JIC ELECTRICAL STANDARDS

JIC ELECTRICAL STANDARDS

  NOTE: NOTE: THIS THIS COPY COPY OF THE JIC JIC ELECTRI ELECTRICA CAL L STAN STANDA DARDS RDS IS INTENDE INTENDED D ONLY ONLY AS AN INFORMATIONAL SOURCE FOR TRAINING INFORMATION – if updated information pertaining to Industrial Electrical Standards are required please refer to NFPA NFPA 79-1994 79-19 94 (ANSI) or later. Additionally: Additionally: Appendix F, Sample Electrical Equipment Data Form has not been included in this copy.

TABLE OF CONTENTS E1. General ............................................. .................................................................... .............................................. .............................................. .............................................. .............................................. .............................................. .............................................. ............................................... ........................ ...4 E1.3 Definitio Definitions. ns. ........................................... .................................................................. .............................................. .............................................. .............................................. .............................................. .............................................. .............................................. .................................... ............. ........4 E 2. Diagrams, Diagrams, Data, Nameplates Nameplates and Identificat Identification ion .............................................................. ..................................................................................... .............................................. .............................................. ...............................................................4 ........................................4 E2.1 Diagrams. Diagrams. General ............................................. .................................................................... .............................................. .............................................. .............................................. .............................................. .............................................. ......................................................4 ...............................4 E2.2 Elementary Elementary (Schematic) (Schematic) Diagram.................... Diagram........................................... .............................................. .............................................. .............................................. .............................................. ............................................. .........................................................5 ...................................5 E2.3 Block and Logic Logic Diagrams. Diagrams. ............................................ ................................................................... .............................................. .............................................. .............................................. .............................................. .............................................. ..........................................6 ...................6 E2.4 Panel Layout and Interconn Interconnectio ection n Diagram. ............................................ ................................................................... .............................................. .............................................. .............................................. .............................................. ........................................6 .................6 E2.10 Equipment Equipment Nameplates. Nameplates. .............................................. ..................................................................... .............................................. .............................................. .............................................. .............................................. .............................................. ...................................... ............... .....6 E3. Supply Circuit Disconnect Disconnecting ing Means .............................................. ..................................................................... .............................................. .............................................. .............................................. .............................................. ............................................... ........................ ...7 E 3.3 Rating. Rating. .............................................. ..................................................................... .............................................. .............................................. .............................................. .............................................. .............................................. .............................................. ............................................ ..................... ...7 E3.9 Mounting. Mounting. ........................................... .................................................................. .............................................. .............................................. .............................................. .............................................. .............................................. .............................................. ......................................... .................. .....8 E3.10 Interlocking Interlocking.. ............................................ ................................................................... .............................................. .............................................. .............................................. .............................................. .............................................. .............................................. ........................................8 .................8 E3.11 Operating Operating Handle. ............................................ ................................................................... .............................................. .............................................. .............................................. .............................................. .............................................. ......................................................8 ...............................8 E4. Protection Protection ............................................. .................................................................... .............................................. .............................................. .............................................. .............................................. .............................................. .............................................. ...............................................8 ........................8 E4.2 General. General. .............................................. ..................................................................... .............................................. .............................................. .............................................. .............................................. .............................................. .............................................. ......................................... .................. .....8 E4.3 Main and Branch Circuit Circuit Overcurrent Overcurrent Protection Protection............... ...................................... .............................................. .............................................. .............................................. ............................................. ............................................. ........................................ ................. 8 E4.4 Control-C Control-Circuit ircuit Overcurrent Overcurrent Protection Protection..................... ............................................ .............................................. .............................................. .............................................. .............................................. .............................................. ..............................................10 .......................10 E5.2 Control Control Voltage.............. oltage..................................... .............................................. .............................................. .............................................. .............................................. .............................................. .............................................. .............................................. .......................................... ................... .12 E5.3 Connectio Connection n of Control Control Devices. Devices. ............................................ ................................................................... .............................................. .............................................. .............................................. .............................................. .............................................. ..................................12 ...........12 E5.4 Circuit Design Design and Interlockin Interlocking.............. g..................................... .............................................. .............................................. .............................................. .............................................. .............................................. .............................................. .................................... ............. .....13 E6. Control Control Equipment Equipment ............................................. .................................................................... .............................................. .............................................. .............................................. .............................................. .............................................. .............................................. ...............................14 ........14 E6.1 Standards. Standards. ........................................... .................................................................. .............................................. .............................................. .............................................. .............................................. .............................................. .............................................. ....................................... ................ .....14 E6.3 Motor Motor Starters Starters ............................................ ................................................................... .............................................. .............................................. .............................................. .............................................. ............................................. ............................................. ..................................... .............. .14 E7 Control Control Enclosures Enclosures and Compartmen Compartments ts ............................................. .................................................................... ............................................. ............................................. .............................................. .............................................. .............................................. ..........................15 ...15 E7.2 Size Definition Definition................. ........................................ .............................................. .............................................. .............................................. .............................................. .............................................. .............................................. .............................................. .................................... ............. .....15 E7.3 Enclosures. Enclosures. ........................................... .................................................................. .............................................. .............................................. .............................................. ............................................. ............................................. .............................................. ............................................15 .....................15 E7.4 Compartment Compartments. s. .............................................. ..................................................................... .............................................. .............................................. .............................................. .............................................. .............................................. .............................................. ..................................16 ...........16 E7.5 Doors. Doors. ........................................... .................................................................. .............................................. .............................................. .............................................. .............................................. .............................................. .............................................. ..................................................16 ...........................16 E 7.6 Door Fasteners. Fasteners. . ........................................... .................................................................. .............................................. .............................................. .............................................. .............................................. ............................................. ........................................................16 ..................................16 E8. Location Location and Mounting Mounting of Control Control Equipment Equipment ........................................... .................................................................. .............................................. .............................................. ............................................. ............................................. ..................................... .............. .16 E8.1 General Requirement Requirements.......... s................................. .............................................. ............................................. ............................................. .............................................. .............................................. .............................................. .............................................. ......................................16 ...............16 E8.2 Control Control Panels. Panels. ............................................ ................................................................... .............................................. .............................................. .............................................. .............................................. .............................................. .............................................. ....................................16 .............16 E8.3 Control Control Panel Enclosure. Enclosure. ............................................. .................................................................... .............................................. .............................................. ............................................. ............................................. .............................................. ............................................17 .....................17 E8.4 Clearances Clearances in Enclosures. Enclosures. ............................................. .................................................................... .............................................. .............................................. ............................................. ............................................. .............................................. ...........................................17 ....................17 E8.5 Miscellaneou Miscellaneouss Control Control Equipment Equipment ............................................ ................................................................... .............................................. .............................................. .............................................. .............................................. ............................................. ..............................17 ........17 E9. Operator's Operator's Control Control Stations Stations and Devices........... Devices.................................. .............................................. .............................................. .............................................. .............................................. .............................................. .............................................. ..................................17 ...........17 E9.2 Fixed Stations. Stations. ........................................... .................................................................. .............................................. .............................................. .............................................. .............................................. .............................................. .............................................. .....................................18 ..............18 E9.3 Control Control Station Station Componen Componentt Arrangement Arrangement................... .......................................... .............................................. .............................................. ............................................. ............................................. .............................................. ..............................................18 .......................18 E9.4 Control Control Station Station Location. Location. .............................................. ..................................................................... .............................................. .............................................. .............................................. .............................................. .............................................. .........................................18 ..................18 E9.5 Pendant Pendant Stations Stations ............................................. .................................................................... .............................................. .............................................. .............................................. .............................................. .............................................. .............................................. .................................18 ..........18 E9.5.1 Pendant Pendant stations stations shall be oil-tight oil-tight.. .............................................. ..................................................................... .............................................. .............................................. .............................................. .............................................. ............................................. ...................... ...18 E10. Electrical Electrical Accessori Accessories es ............................................. .................................................................... .............................................. .............................................. .............................................. .............................................. .............................................. ................................................18 .........................18 E10.1 Plugs and Receptacles. Receptacles. ............................................ ................................................................... .............................................. .............................................. .............................................. .............................................. .............................................. .............................................18 ......................18 E10.2 Work Lights........ Lights............................... .............................................. .............................................. .............................................. ............................................. ............................................. .............................................. .............................................. .....................................................18 ..............................18 E11. Conductors Conductors ............................................. .................................................................... .............................................. .............................................. .............................................. ............................................. ............................................. .............................................. ..........................................19 ...................19 E11.3 Conductor Conductor Ampacity Ampacity ............................................ ................................................................... .............................................. .............................................. .............................................. .............................................. .............................................. ............................................. ...................... ...19 E11.4 Electronic, Electronic, Precision Precision,, Static and Similar Similar Control. Control. ............................................. .................................................................... .............................................. .............................................. .............................................. ..................................................20 ...........................20 E12. Wiring Wiring Methods Methods and Practices Practices ............................................. ................................................................... ............................................. .............................................. .............................................. .............................................. .............................................. ....................................21 .............21 E12.1 General Requirement Requirements. s. ............................................ ................................................................... .............................................. .............................................. .............................................. .............................................. .............................................. .............................................21 ......................21 E12.2 Electrical Electrical Connectio Connections. ns. ........................................... .................................................................. .............................................. .............................................. ............................................. ............................................. .............................................. ...............................................21 ........................21 E12.3 Panel Wiring Wiring ........................................... .................................................................. .............................................. .............................................. .............................................. .............................................. .............................................. .............................................................21 ......................................21 E12.4 Equipment Equipment Wiring........ Wiring............................... .............................................. .............................................. .............................................. .............................................. ............................................. ............................................. .............................................. ............................................22 .....................22 E13. Raceways, Raceways, Fittings Fittings and Bends Bends ........................................... .................................................................. .............................................. .............................................. .............................................. ............................................. ............................................. ..................................... .............. .22 E13.1 General Requirement Requirements. s. ............................................ ................................................................... .............................................. .............................................. .............................................. .............................................. .............................................. .............................................22 ......................22 E13.2 Rigid Rigid Metal Conduit Conduit and Fittings. Fittings. .............................................. ..................................................................... .............................................. .............................................. .............................................. .............................................. .................................................22 ..........................22 E14. Motors Motors ............................................ ................................................................... .............................................. .............................................. ............................................. ............................................. .............................................. .............................................. .............................................. ...........................25 ....25 E14.5 Special Special Characteristi Characteristics. cs. ........................................... .................................................................. .............................................. .............................................. .............................................. .............................................. .............................................. .......................................... ................... ...25 E15. Grounding Grounding ........................................... .................................................................. .............................................. .............................................. .............................................. ............................................. ............................................. .............................................. .............................................25 ......................25 E15.1 Control Control Circuits Circuits .............................................. ..................................................................... .............................................. .............................................. .............................................. .............................................. .............................................. .................................................. ........................... ...25 E15.5 Equipment Equipment Grounding Grounding Conductor Conductorss ............................................. .................................................................... .............................................. .............................................. .............................................. .............................................. .................................................26 ..........................26 E16. Testing Testing ............................................. .................................................................... .............................................. .............................................. .............................................. .............................................. .............................................. .............................................. .......................................... ................... .....26 E17. Gaskets .............................................. ..................................................................... .............................................. .............................................. .............................................. .............................................. .............................................. .............................................. .......................................... ................... ...26 Appendi Appendix x A-Typical A-Typical Graphic Graphic Symbols Symbols for Electrical Electrical Diagrams............. Diagrams.................................... .............................................. .............................................. .............................................. .............................................. .................................................28 ..........................28 *Appen *Appendix dix B—Sample B—Sample Electrical Electrical Diagrams....................... Diagrams.............................................. .............................................. .............................................. .............................................. .............................................. .............................................. .............................................32 ......................32 Appendi Appendix x C-Glossary C-Glossary of Terms Terms ............................................. .................................................................... .............................................. .............................................. .............................................. .............................................. .............................................. ..........................................35 ...................35 Appendi Appendix x D-Device D-Device Designation Designationss .............................................. .................................................................... ............................................. .............................................. .............................................. .............................................. .............................................. ......................................39 ...............39 Appendi Appendix x E-Referen E-References ces to Other Codes and Standards Standards .............................................. ..................................................................... .............................................. .............................................. .............................................. ...................................................40 ............................40 Appendi Appendix x F-Sample F-Sample Electrical Electrical Equipment Equipment Data Form .............................................. .................................................................... ............................................. .............................................. .............................................. .....................................................41 ..............................41

JIC ELECTRICAL STANDARDS FOR  MASS PRODUCTION EQUIPMENT (EMP – 1 – 1967) FOREWORD

THE THE BUIL BUILDE DERS RS AND USER USERS S of machine machine tools tools and Membership Membership in the JIC is open to interested and affec affected ted similar industrial equipment as well as the manufacturers companies, associations and organizations that desire to of electrical apparatus have long realized that safety of the  participate in the fulfillment of these objectives. machine operator and maintenance of production are of  Paralleling the old standards, two new ones have been cardinal importance in the design and purchase of such written, one for General Purpose Machine Tools and one equi equipm pment ent.. To fulf fulfil illl this this real realiza izati tion on in the area area of  for Mass Production Equipment. These new standards are equipment electrification, this standard is the latest in a intended to be basic in nature; that is. they do not contain series which has been issued in the last 25 years. any requirements specific to anyone company. division or  The first form of the machine tool electrical standards was  plant. It is anticipated that purchasers using JIC standards issued by the National Machine Tool Builders' Association Association will will also also add add their their own own parti particu cular lar requir requirem emen ents ts to (NMT (NMTBA BA)) in 1941 1941.. The NMTB NMTBA A stand standard ard has been been   pur purch chas asee spec speciifica ficati tion onss in orde orderi ring ng equi equipm pmen ent. t. revise revised d and reissu reissued ed period periodica ically lly until 1960 1960 when when the Further Furthermore more,, the purchas purchaser er must must clearl clearly y state state which which most recent issue was released. version he requires adherence to, if either . In 1948 1948 the firs firstt elec electr tric ical al standa standard rd for for indus industri trial al Additional requirements for particular equipment such as equipment was issued by the Joint Industry Conference. furnaces, welders. presses. etc., have not been included in The revision and re-issuance of this standard continued either of the standards. It is anticipated that these will be until 1957. covered by addendum sheets to be issued later. Electronic While While the two two standards standards were were very very similar similar,, the Joint Joint applica applicatio tions ns will will also also be cover covered ed more more thorough thoroughly ly in Industry Conference Conference standard also included equipment equipment another standard. other than machine tools and laid particular emphasis on All JIC Standards are advisory on/y. Their use in industry maintenance problems problems peculiar to the mass production production or trade is entire/y voluntary. voluntary. industries. The JIC assumes no liability for any patent infringements In 1963 1963 both both stand standard ardss were ere in need need of revie review w and or asserted patent infringement which may result from the revision. For this purpose a new organization, the Joint use of these standards. Industrial Council (JIC), was formed in order to provide Comme Comments nts or reque requests sts for for informa informatio tion n regarding regarding JIC directi direction, on, coordi coordinati nation on and continui continuity ty of effor effortt in the activities or interpretations of the JIC standards should be devel developm opment, ent, advance advancement ment,, and referr referral al to the United United addressed to the Secretary of the Joint Industrial Council, Stat States es of Ameri America ca Stand Standard ardss Insti Institu tute te (USA (USASI SI)) of  care of the National Machine Tool Builders' Association. standard standardss which which will will encoura encourage ge the safe safe and reliab reliable le 2139 Wisconsin Avenue. Avenue. N.W., Washington. Washington. D. C. 20007. application of controls to machines and equipment used in industrial applications. ACKNOWLEDGEMENT These standards are reproduced with the expressed permission of the Joint Industrial Council This portion is a reproduction of the JIC Electrical Standards for Mass Production Equip ment. EMP-1-1967. SCOPE AND APPLICATION OF STANDARDS These standards supersede the Chrysler Corporation Electrical Standards for Industrial Equipment dated june.1963. They shall apply to all electrical systems, furnished as a part of the machine tool or mass production industrial equipment, which operate from a supply voltage of 600 volts or less, commencing at the power supply terminals on the disconnecting means (See E1.2 for exceptions to this rule). The Sample Electrical Equipment Data Form attached hereto as Appendix F shall accompany all purchase inquiries for the  particular equipment specified herein. See the Foreword Foreword for instructions for orderi ng specialized equipment such as furnaces, welders and mechan ical presses.

E1. General E1.1 Purpose. The purpose of this Electrical Standard is to p rovide rovide detailed detailed specifi specification cationss for the application application of  electrical systems systems to mass production in dustrial equipment which will promote. (1) Safety to personnel. (2) Uninterrupted production. (3) Long life of the equipment. (4) Ease and low cost of maintenance. This This stan standa dard rd is not not int intende ended d to limi limitt or inhi inhibi bitt adva advanc ncem ement ent in the art art of elec electri trica call or mecha mechanic nical al engineering. E1.2 Scope. The provisions of this standard shall apply to all electri electrical cal syste systems, ms, furnish furnished ed as part of the mass mass   production production industrial equipment, which operate operate from a supply voltage of 600 volts or less, commencing at the  power supply terminals on the disconnecting means. Except Exception ion No. No. 1: Hazard Hazardous ous Locat Locations ions.. This This standard standard shall shall not be consid considere ered d adequa adequate te for for mass mass produc productio tion n indus industri trial al equi equipm pment ent intend intended ed for use use in loca locati tions ons designated as hazardous in the National Electrical Code. *Exception No 2. Fixed or Portable Tools. This standard is not intended to apply to 115 volt, single phase, portable type type equipm equipment, ent, using using cord cord connec connectio tions. ns. unless unless such such equipment is auxiliary to the mass production industrial equipment. E1.3 Definitions. *E1.3.1 Mass Production Industrial Equipment . Mass   prod produc ucti tion on indus industri trial al equi equipm pment ent is defi define ned d as any equipment electrically powered or controlled, used in or  neces necessary sary for for manufac manufacturi turing ng proce processe ssess and assemb assembly ly equipment Electrical system systemss shall E1.3.2 E1.3.2 Electric Electrical al System Systems. s. Electrical include: (1) Electrical equipment consisting of motors, solenoidoperat operated ed devic devices, es, limit limit swit switches ches,, pressur pressuree switc switches hes,, control station electrical components and similar contactmaking devices, together with the associated wiring. (2) Electr Electronic onic equipm equipment ent togeth together er with with the associ associate ated d wiring and devices. (3) Static control control equipment equipment together together with the associate associated d wiring and devices. E1.3.3 Nominal Voltages. All voltages hereinafter will be considered nominal 115 volts, 230 volts and 460 volts. (See Appendix Appendix C for definition of nominal voltage.) E1.4 Additional Codes and Specifications. On any point for whic which h spec specif ific ic prov provis isio ions ns are not not made made in this this standard. the provisions of the National Electrical Code (NEC) and state and local codes shall be observed. The  National Fire Protection Association Association (NFPA) (NFPA) Standard Standa rd 79, inclu include ded d with with the Nati Nationa onall Elec Electri trica call Code Code appli applies es specifically to machine tools. Articles 500 through 540 of  the Nationa Nationall Electr Electrica icall Code Code apply apply, as applica applicabl ble, e, to Hazardous Locations. Whenever ver a E1.5 Specific Specific Standa Standards rds and Revisi Revision onss. Whene speci specifi ficc standard standard is mention mentioned ed in this standard, standard, it is under- stood it will be "the latest revision thereof" unless other- wise specified. E1.6 Deviations. Deviations from this standard shall have the approv approval al of the purchas purchaser er in writing writing.. Any waiver waiverss

granted shall apply only to the order in question and shall not be considered as permanent. E1.7 Use of .'Shall" and "Should". "Should". The word '.shall'. is underst understoo ood d as a requirem requirement; ent; the word "shoul "should" d" as a recommendation. *E1.8 *E1.8 Conf Confor ormi mity ty to JIC JIC Stan Standa dard rdss. Whe n the   purchas purchaser er require requiress that electr electrica icall equipm equipment ent and the instal installat latio ion n of such such equi equipm pment ent by the supp suppli lier er shall shall conform to this standard and other requirements, it shall  be so specified on the purchase inquiry. (See E 1.9) purchasee *E1.9 *E1.9 Additi Additiona onall User User Requir Requireme ements nts The purchas inqu inquir iry y shal shalll be acc accompa ompani nied ed with ith an Elec Electr tric ical al Equipm Equipment ent Data Data Form Form and shall shall be confirme confirmed d on the   purchase purchase order. order. (See (See Appendix F for Sample Electrical Equipment Data Form) **E1.10 Approvals and Final Drawings. The industrial equipment builder shall submit to the purchaser diagrams and data speci specifi fied ed on the Electri Electrical cal Equipm Equipment ent Data Data Form. **E1.10.1 Approvals. Approval shall be obtained be- fore electr electrica icall compo component nentss are install installed ed on the industri industrial al equipment. equipment. After preliminary preliminary approval approval any deviations deviations made by the equipment builder shall have the approval of  the purchaser in writing before changes are made. omplet etio ion n of the the **E1.10. **E1.10.2 2 Final Final Drawing Drawingss. On compl indus industri trial al equi equipm pment ent and not later later than than the date date of  shipm shipment ent,, a comp comple lete te set set of non-f non-fol olde ded d tracin tracings gs or  reproducible copies of final diagrams shall be forwarded to the the purc purcha hase serr. The The qual qualit ity y of the the trac tracin ing gs or  reprodu reproduci cible ble copie copiess shall shall permit permit making making changes changes and clearly legible prints. If any field changes are made by the industrial equipment builder. they shall be recorded and a repro reprodu duci cibl blee copy copy of the chang changed ed drawi drawing ng shall shall be forwarded to the purchaser or other designated person E 2. Diagrams, Data, Nameplates and Identification E2.1 Diagrams. General *E2.1.1 Drawing Size. The electrical diagrams. including  panel layout. stock list and sequence of operations should   be shown shown on the same same sheet. sheet. The founda foundatio tion n drawing drawing should be shown on a separate sheet. Multiple sheets shall   be crosscross-ref referen erenced ced.. All inform informati ation on shall shall be clearl clearly y legi legibl blee Shee Sheett size size shall shall be 24" 24" x 36". 36". (For (For sampl samplee diagrams, see Appendix B) *E2.1.2 Diagrams Supplied. Diagrams of the electrical system shall be furnished. The diagrams shall show the equi equipm pment ent seria seriall number number.. the purcha purchase ser' r'ss drawi drawing ng number. purchase order number or similar identification which will indicate the particular equipment to which the diagrams apply. Diagrams shall show all equipment in the elec electri trica call syst system em inclu includin ding g intern internal al wirin wiring g of subsubassemblies. Diagrams of sub-assemblies may be furnished on separate sheets. Except Exception. ion. On industri industrial al equipm equipment ent having having only only one motor and one starter. the diagram normally furnished with the combination starter is satisfactory. provided the diagram diagram shows shows all of the electr electrica icall apparat apparatus us on the industrial equipment. E2.1.3 Symbols and Device Designations. shown in E2.1.3.1 E2.1.3.1 Standar Standard d electrica electricall symbol symbolss as sho Appendix A shall be used for all diagrams For symbols

not not shown shown in Appe Append ndix ix A refe referr to Unit United ed Stal Stales es of  America Standard Y32.2. Symbols for logic devices shall   be in accordance with NEMA Standard IC-I. Industrial Control. Exception. Special symbols symbols may be used where t here is no standard symbol; symbol; such symbol symbolss shall be identified identified and expla explaine ined d both both on the diagr diagram amss and in instru instruct ction ion manuals. E2.1.3.2 The symbols for devices shall be identified by a number or number-Ietter combination, using abbreviations shown shown in Appendi Appendix x D. For For specia speciall abbre abbrevia viatio tions ns not listed. refer to NEMA Standard IC-1. Industrial Control. E2.1 3.3 The following alphabetical designations shall be used for the devices indicated and shall not be used for  other identification purposes: Items Examples Relays-General Us Use CR, 1C 1CR, 2C 2CR   -Master CRM -Automatic CRA -Electronically CRE, 1CRE, 2CRE Energized -Manual(hand) CRH -Latch CRL, 1CRL, 2CRL -Unlatch CRU, 1CRU, 2CRU Timers TR, 1TR, 2TR   Overload Relay OL, 1OL, 2O 2OL Motor Starters 1M, 2M, etc. Reversing Motor   1 M F ( Forward)- 1 M R  Starters (Reverse) Example: 2M F Starter Number  Forward Plugs Example:

1PL, 2PL, etc. 2PL 6

Plug Number  Pole Number  Solenoids 1SOL. 2SOL, 3SOL Limit Switches 1LS, 2LS, 3LS Pressure Switches 1PS, 2PS, 3PS E2.1.3.4 Special abbreviations not covered by the above  paragraphs may be used and shall be identified on the diagram:; and In the instruction manual. E2.1.4 Conductor Identification. Each conductor shall be iden identi tifi fied ed by a numb number er.. lett letter er or numb number er-I -Iet ette ter  r  combinatio combination. n. Consecuti Consecutive ve numbering is preferred. preferred. The identi identific ficati ation on shall shall be used used only only once once in the electri electrical cal system. Each conductor shall have the same identification at all terminals and tie points. All conductors connected to the same termi terminal nal or tie tie point point shall shall have have the same same identification. Where multiconductor cable is used. a color  code may be used to supplement the above identification. Where Where color color-- coded coded multic multicondu onduct ctor or cable cable is used used for  for  wiring identical components. such as limit switches. the color code used shall he consistent and charted on related diagrams. E2.1.5 Sub-assembly Terminal Identification. Terminal numbers. letters or number-Ietter combinations for subassemblies or components shall be identified distinctivelyand associated with the sub-assembly or component.

E2.2 Elementary (Schematic) Diagram. E2.2.1 An elementary diagram shall be furnished for each electrical system. A logic diagram may be furnished in lieu of or in combination with an elementary diagram . E2.2.2 The elementary diagram shall be drawn between vertical lines which represent the source of control power . All control devices shall be shown between these lines. Actuating coils of control devices shall be shown on the right-hand side. All contacts shall be shown between the coils and the left vertical line. Where the internal wiring diagrams of sub-assemblies are furnished on separate sheets. they shall be shown as a rectang rectangle le in the elemen elementary tary diagram diagram with with all externa externall   points points identif identifie ied d and crosscross-re refer ference enced d to the separa separate te sheet(s) sheet(s) of the control control circuit. circuit. Coils and contacts contacts internal to the sub-a sub-asse ssembl mblie iess shall shall be shown in the rectang rectangle le connected to their terminal points. Exception No. 1: Where relay and electronic circuits are mixed. diagrams may be drawn between horizontal lines which represent the source of control power power . verloa oad d rela relay y conta ontact ctss may may be Except Exception ion No.2 No.2. Overl conne connect cted ed to the right right of the coil coil (com (commo mon) n) if the conduc conductor torss betw between een such such contac contacts ts and the coils coils of the magne magneti ticc devi device cess do not exte extend nd bey beyond the contr control ol enclosure. E2.2.2.1 Control device symbols should be shown in the order in which the controls are energized and positioned on the diagr am for clarity. cross-referencing encing system system shall be used in *E2.2.2.2 A cross-refer conj conjunc uncti tion on with with each each relay relay coil coil so that that asso associ ciat ated ed contacts may be readily located on the diagram. Where a relay contact appears on a sheet separate from the one on which the coil is shown. the purpose of the contact shall  be described on the same sheet. E2.2.2.3 Only contacts actually used shall be shown. flow. temperature-sensitive E2.2.2.4 Limit. pressure. float, flow. and simi similar lar s\\ s\\itch itch sym symbols bols shall shall be show shown n on the elementary diagram with all utilities turned off (electric  power, air. gas. oil, water. lubrication. etc.) and with the equipment at its normal starting position. Contacts ts of multiple multiple-c -conta ontact ct devic devices es (e.g.. (e.g.. E2.2.2.5 Contac sele select ctor or swit switche ches) s) shall shall be show shown n on the line line of the elementary diagram where they are connected in a circuit. A mechanical connection between the multiple contacts shall be indicated by a dotted line or arrow. This does not apply to control relays. starters or contactors. E2.2.2.6 Additional charts or diagrams may be used to indicate the positIon of multiple-contact devices such as drum, cam a nd selector switches. connecti tions ons betw between een push button buttons. s. limit limit E2.2.2.7 The connec switches and similar items connected in series shall be shown as test points on the diagram as required in E 12.4.14. E2.2.2.8 The purpose or function of all switches shall be shown shown either either adjace adjacent nt to the sym symbols. bols. or in a switc switch h description description chart. The chart shall be on the same sheet as the symbol. *E2.2.2. 9 The purpose or function of controls such as relays, starters. contactors. solenoids, sub-assemblies and timers shall be shown on the diagram adjacent to their  respec respectiv tivee sym symbols. bols. The number number of positi positions ons of the

solen solenoid oid valve valve shall shall be shown adjace adjacent nt to the valve valve solenoid symbol. alues of capaci capacitor torss and resist resistors ors shall shall be E2.2.2.10 Values shown on the diagram. Descripti iptive ve terms terms for for comman command d and status status E2.2.2.11 Descr func functi tions ons shall shall be in the prese present nt or past past tens tense. e. For  For  exampl example. e. Raise Raise Transf Transferer-Tra Transf nsfer er Raised Raised:: Advanc Advancee Transfer-T Transfer-Transfer ransfer Advanced. Advanced. Terms such as " Transfer  Transfer  Up'. shall not be used. Coils of relay relayss and other other control control devic devices es **E2.2.2.12 Coils should be grouped and drawn in the following order  (1) Sequencing and position indicating relays. etc. (2) Solenoids for valves. Within each group. control devices shall be shown in the order or energization. Exce Except ptio ion: n: Sole Soleno noid idss comm common on to a valv valvee shou should ld be grouped together; for example: “Clamp" and "Un-clamp." Electronic diagrams shall E2.2.3 Electronic Electronic Diagram. Electronic inclu include de perti pertinen nentt data data for for maint maintena enanc ncee purpo purpose sess as follows. (1) Voltage and current data necessary for maintenance  purposes. (2) Normal voltages on transformer windings. (3) Signal input and output voltages. (4) Potentials applied to tube elements. (5) Oscilloscope traces. showing wave form and peak- to peak voltages where meter readings are inadequate. (6) The type and sensitivity or test instruments to be used and the condition of the circuit. (7) (7) The instan instantan taneo eous us polar polarit ity y or each each trans transfo form rmer  er  winding in phase sensitive circuits. (8) (8) The The elec electr tric ical al valu values es of capa capaci cito tors rs.. resi resist stor ors. s. inductances and other electronic components. E2.3 Block and Logic Diagrams. Where the comple complexit xity y or the E2.3.1 E2.3.1 Block Diagram. Diagram. Where contro controll syste system m warrants warrants.. a bloc block k diagram diagram of contro controll funct unctio ions ns shal shalll be furn furnis ishe hed. d. Each Each bloc block k shal shalll be identi identifie fied d and crosscross-re refer ference enced d in a manner that the internal circuitry may be found readily on the elementary diagram. E2.3.2 Logic Diagram. A logic diagram of the electrical syste system m shall shall be furnish furnished ed when when static static contro controll or logic logic modules are supplied. The diagram need not show power  connections. E2.4 Panel Layout and Interconnection Diagram. *E2.4.1 The panel layout shall show the general physical arrangeme arrangement nt of all compon components ents on the control control panel. Devices may be represented by rectangles or squares and shall be identified with the same marking as used on the eleme lement ntar ary y diag diagra ram m Spar pare pane panell spac pace shal shalll be dimensioned The drawings shall include a layout of the operator's operator's console console or push button station, station, but terminal numbers need not be shown. This layout may be combined on the same drawing with the interconnection interconnection diagram or  wiring table. (See Sample Diagram in Appendix B.) Photographs raphs of electr electronic onic chassis chassis and similar  similar  E2.4.2 Photog complex devices devices ma} he furnis hed in lieu of panel layouts,  provided each component is clearly visible visible and identified. interconnection diagram or wiring table table shall E2.4.3 -An interconnection   be furnished to Indicate the Interconnecting conductors  between all terminals on each terminal block for all panel,

and chassis chassis comprising comprising the complete complete electrical electrical system. system. Each Each connec connectio tion n shall shall be identifie identified d as shown shown on the elemen elementary tary diagram Blank Blank space spacess and spare spare terminal terminalss shall be shown. For logi logicc contr control ol syst system ems, s, a panel panel lay layout out **E2.4.4 For diagram diagram shall shall (1) consist consist of an outline outline of the contro controll  panel, and (2) show the general physical arrangement of  the the pane panell-mo moun unte ted d devi device ces. s. Each Each devi device ce may may be represented represented a square or rectangle. Each device shall have the same identification as on the elementary diagram. stock list list shall shall show show quantity quantity,, E2.5 E2.5 Stoc Stock k List List The stock manufacturers name, type or model and catalog number of  each device used: motor horsepower, frame size. type of  enclosure, and speed: and any other information necessary to order replacement electrical and electronic items E2.6 Sequence of Operation Operation. The sequence of operation shall indicate the progression of operations of all push  buttons, buttons, limit switches switches.. relays. relays. solenoids solenoids and other devices as shown and identified on the elementary diagram. Graphical representations, such as bar charts. may be used to supplement written descriptions. E2.7 Instruction Manuals . On complex equipment. such as numerical control system systems. s. servo servo controls, controls, electrica electricall variable-speed drives. etc.. an instruction manual shall be furnished. The following shall be included: (1) Information necessary necessary for calibrating calibrating and adjusting adjusting components. devices and sub-assemblies. sub-assemblies. (2) Operati Operation on instruct instruction ions. s. including including all informa informatio tion n neces necessar sary y to descri describe be the operat operation ion of the: the: comple complete te system. (3) Maintenance instructions, including information and suggestions for locating and replacing faulty components. suggested maintenance schedules and related data. (4) (4) A reco recomm mmend ended ed spare spare parts parts list list with with comp comple lete te ordering information and suggested quantities. E2.8 Electrical Layout. The electrical layout shall consist or an outline or the equipment, not necessarily to scale. showing the control panel enclosure and its dimensions, opera operato tor' r'ss cons consol olee and acce access ssor ory y units units not not atta attache ched d directly to the equipment. such as hydraulic power units. in their relative locations The drawing shall also show the locati location on or contro controll devi device cess whose whose locat location ion cannot cannot be readil readily y dete determ rmine ined d from from the elem element entar ary y and othe other  r  elec electri trica call diagra diagrams. ms. such such as limit limit swit switch ches es used used on indexing mechanisms. All devices shall be identified as shown on the elementary diagram. equipm pment ent requi requirin ring g E2.9 Found Foundati ation on Drawing Drawing. On equi conduit in the foundation. the minimum size, purpose and location of the conduit to be used shall be shown on a foundation drawing. E2.10 Equipment Nameplates. E2.10.1 Main Nameplate. A permanent non-corrodible nameplate shall be attached to the control enclosure door  This nameplate shall list the following: (1) Equipment serial number  (2) Supply voltage, phase and frequency. frequency. (3) Rated K V A or full-Ioad current (see E 2 .10.1.1). (4) NEMA interrupting capacity of the circuit breaker (if  supplied) (5) Ampere rating of the largest motor .

(6) Supplier's electrical diagram number. here only only a sing single le moto motorr and and mot motor  Exception. Where controller are used, the motor nameplate may serve as the electrical equipment nameplate if it is plainly visible. E2.10.1.1 .The full-load current shown on the name- plate shall be not less than the sum of the full-Ioad currents required for all motors and other equipment which may be in operation at the same time under normal conditions of  use. use. Where Where unusual unusual loads, loads, duty duty cycle cycles, s, etc.. etc.. require require overs oversize ized d conduc conductor tors, s, the require required d capaci capacity ty shall be included in the .”full-load current" rating as marked. E2.10.1.2 Where more than one Incoming supply circuit is provid provided, ed, the nameplat nameplate: e: shall shall state state the abov abovee information for each circuit overcurrent protection protection is provided provided in E2.10.1.3 Where overcurrent accordance with E 4 3. Main and Branch Circuit Overcurrent Protection. the: nameplate shall be permanently marked "Overcurrent "Overcurrent protection protection provided at equipment equipment supply terminals. A separate nameplate may be used for  this purpose Wheree the the build uilder er wishes shes to indi indica cate te E2.10.1.4 Wher compl omplia ianc ncee with ith this this and and othe otherr stand tandar ards ds,, it is reco recomm mmend ended ed that that the namep nameplat latee be marke marked d with with a notat notatio ion n simi similar lar to the foll follow owing ing:: '.The '.The elec electr tric ical al equipment and wiring on this machine conform to the following standard(s) ...” Additi tiona onall Name Namepl plat ates es Where Where elec electri trica call E2.10.2 Addi equipm equipment ent is remove removed d from from the original original enclosur enclosure, e, or  where where equipm equipment ent is so placed placed that the manufac manufacture turer's r's nameplate is not readily visible, an additional nameplate shall be permanently attached to the equipment or enclosure. Nameplates shall not be removed from electrical equipment. E2.11 Device Identification Control and power devices shall shall be plainly plainly and permanen permanently tly identifie identified. d. using using the same identification as shown on the elementary diagram. Identification shall be shown on a plate mounted adjacent to, not on, the device. Control station components shall be identified by function. (See E 9.3.2) Exception No.1. Where the size or location of the devices make make individ individual ual identi identific ficati ation on impract impractica ical. l. such such as on electronic assemblies, assemblies, group identification s hall be used. Wheree panel panel lay layouts outs do not permi permitt Exception Exception No.2. Wher mounting identification identification plates plates adjacent adjacent to components, components, such as relays, the permanent relay identification shall be   place placed d on the relay relay where where it is plainly plainly visibl visible. e. and a secon second d identif identifica icatio tion n provid provided ed on the top of the panel panel wireway wireway cover directly directly below below the relay. relay. The wireway wireway covers shall be identified to show their proper location. **E2.12 Identification Plates. **E2.12.1 Plates for devices mounted inside the control enclosure shall be one of the following: (1) Non-corrodible metal for engraving stock; a minimum of 0.031 inch thick. (2) Non-corrodible metal for embossing stock; a mini mum of 0.012 inch thick. (3) Laminated phenolic for engraving stock; a mini- mum of 0.062 inch thick. Plates shall be held in place with metallic drive screws or  the equiva equivalen lent. t. Perman Permanent ent adhesi adhesives ves shall shall be used used for  for  attaching nameplates to wireway covers. covers.

Platess for for devic devices es mounte mounted d externa externall to the **E2.12.2 **E2.12. 2 Plate control enclosure shall be non-corrodible metal. a minimum of 0.031 inch thick for engraving stock or 0.012 inch thick for embossing stock. Plates shall be held in  place with metallic d rive screws. E3. Supply Circuit Disconnecting Means *E3.1 Scope. This section shall apply to all industrial equi equipm pmen ent, t, incl includ uding ing port portab able le and and semi semi-p -por orta tabl blee equipment except: (1) small bench-type tools powered by a single motor rated less than 1/4 horsepower operating from a 115 volt supply, and (2) welding transformers and their control circuits. E3.2 Type. E3.2.1 Where nominal 115 volt, single phase, is the only  power supply to the equipment, a fused disconnect switch or circuit breaker of suitable size shall be ins talled. E3.2.2 On all other equipment the builder shall furnish, as spec specif ifie ied d by the purcha purchase serr, one one of the follo ollowi wing ng disconnecting means: (1) A fusib fusible le or non-fu non-fusib sible le motor motor circuit circuit swit switch ch conconforming to all requirements, except enclosures, listed in  NEMA Standard KS-I, Enclosed Switches, for heavy duty type HO switches, or  (2) A circuit breaker conforming with N EMA Standard AB-I, Molded Case Circuit Breakers, or  (3) A fusible fusible or non-fusible circuit in terrupter. When a separ separat atel ely y mount mounted ed safe safety ty swit switch ch is E3.2.3 When specified by the purchaser as auxiliary equipment, it shall   be be a NEMA NEMA heavy heavy duty duty indus industri trial al type type,, manual manually ly-opera operate ted, d, fusi fusibl blee or non-f non-fus usib ible le (as (as spec specif ifie ied) d) and mounted in a NEMA Type 12 enclosure. E 3.3 Rating. E3.3.1 The ampacity of the disconnecting means shall be not less than 115 115 percen percentt of the sum of the fullfull-Ioa Ioad d currents currents required required for all equipm equipment ent which which may be in operation at the same time under normal conditions. interrupting ing capaci capacity ty of the discon disconnec necting ting E3.3.2 The interrupt means shall be not less than the sum of the locked rotor  current of the largest motor plus the full-load current of  the other connected operating equipment. disconnec necting ting means means shall shall be E3.4 Application. Application. The discon applied in accordance with E4, Protection. E3.5 Position Indication. The disconnecting means shall   plai plainl nly y indic indicat atee wheth whether er it is in the open open or clos closed ed  position. (See E 3.11.3) The E3.6 Suppl Supply y Conduc Conducto tors rs to be Disconn Disconnect ected ed. The disconn disconnect ecting ing means means shall shall disco disconnec nnectt all unground ungrounded ed conductors conductors of the supply supply circuit circuit simultaneous simultaneously ly.. Where ther theree is more more than than one one supp supply ly sour sourcce, addi additi tion onal al individual disconnecting means shall be provided for each suppl supply y circ circui uitt so that that all all suppl supply y condu conduct ctors ors may may be interrupted. incoming g supply supply E3.7 Suppl Supply y Line Connect Connection ion. The incomin conduc conductor torss shall shall terminat terminatee at the disconn disconnect ecting ing means means with no connection to terminal blocks or other devices ahead of the disconnecting means. E3.8 Exposed Live Parts There shall be no exposed live   part partss when when the disc disconn onnec ectin ting g mean meanss is in the open open  position.

E3.9 Mounting. E3.9.1 The disconnecting means shall be mounted within the control enclosure. *Exception: Where panel-mounting or an 800 ampere or  larger disconnecting disconnecting means is impractical, the equipment equipment  builder shall furnish a circuit breaker in a NEMA Type 12 enclosure for installation by the purchaser . *E3.9.2 If more than one disconnecting means is provided for multiple supply circuits in a single enclosure, they shall shall be grou groupe ped d in one one loca locati tion on and mecha mechanic nical ally ly interlocked with the door(s). When disc disconn onnec ects ts are mount mounted ed in sepa separat ratee E3.9.2.1 When enclosures, each supplying power to part of a complete machine or equipment, the following provisions shall be made: (1) A main disconnecting means shall be furnished to deenergize the entire system, system, and (2) (2) The disc disconn onnec ectin ting g means means in any of the separ separat atee control enclosures shall de-energize all current- carrying components in that enclosure when placed in the “OFF”  position. Exception: Control devices and terminals located in the enclosure but energized from a remote source need not be de-energized if iden tified by yellow yellow wiring. *E3.9.3 The disconnecting means shall be mounted at the top top of the contro controll panel; panel; no other other equipm equipment ent shall shall be mounted directly above it. In enclosures with more than three doors, the disconnecting means shall be on the panel at either the extreme right or left. bench-ty type pe equipm equipment ent the comb combinati ination on **E3.9.4 On benchstarter need not be mounted on the equipment. E3.10 Interlocking. E3.10.1 Where there are two or more sources of power to the the equip quipm ment ent or wher here ther theree are are two or more ore independent disconnecting means. not mechanically interlock locked ed with ith each each othe otherr. pow power wiring iring from from each each disconnecting means shall be run in separate conduit, and shall not terminate in or pass through common junction  boxes. When the discon disconnec necting ting means means is mounted mounted *E3.10.2 When withi within n the contr control ol encl enclos osur ure. e. it shall shall be interl interloc ocke ked d mecha mechanic nical ally ly with with the contr control ol encl enclos osur uree door door(s (s). ). A suita suitabl blee devi device ce,, opera operate ted d by a scre screwd wdri rive verr or othe other  r  commo ommon n hand hand tool tool,, shal shalll be pro provide vided d so that that the the interlocks may be by- passed and the panel doors opened without without disconnecting disconnecting the power power.. Interlocking Interlocking must be reactivated reactivated automatically automatically when panel doors doors are closed. closed. Progressive interlocking, door to door, shall not be used. **E3.10.3 All doors on multiple-door enclosures shall be interl interloc ocke ked d simu simulta ltane neou ousl sly y with with the door door whic which h is interlocked with the main line disconnecting means. Exce Except ptio ion n No. No. 1. When When the disc disconn onnec ecti ting ng means means is sepa separa rate tely ly moun mounte ted, d, it shal shalll be mech mechan anic ical ally ly or  electrically interlocked with the control e nclosure door(s). Exce Except ptio ion n No.2 No.2:: The inter interlo lock ck requir requirem emen ents ts of this this   paragraph do not apply to industrial equipment such as electric power for resistance welders or electric furnaces unless specified by the purchaser. However, it does apply to motor control for such apparatus.

Mechanical cal interlo interlocki cking ng shall shall be provid provided ed **E3.10.4 Mechani  betwee  between n the disconnecting disconnecting means and its associate associated d door  to accomplish both of the following: following: (1) Prevent closing of the disconnecting means while the enclosure door is open, unless an interlock is operated, and (2) Prevent closing of the disconnecting means while the door door is in the initial initial latch latch posi positi tion on or until until the door  hardware is fully engaged E3.11 Operating Handle. erating ing hand handlle of the the E3.11.1 E3.11.1 Locatio Location. n. The opera disconn disconnect ecting ing means means shall shall be readily readily acces accessib sible. le. The center of the grip, when in its highest position, shall not  be more than 6 1/2 feet above the floor and should not be lower than 3 feet above the floor . **E3.11.1.1 The operating handle shall be mounted on the front of the control compartment or enclosure, not on a door. cking. g. The The operat eratin ing g hand handle le of the the *E3.11.2 Lockin disconnecting means shall be so arranged that it may be locked in the “OFF" position. Provision shall be made for  a minimum of three locks having shackles 0.375 inch in diameter. *E3.11.3 Position Indication. The operating handle shall   plainly indicate indicate at all times whether whether the disconnecti disconnecting ng means is in the open or closed position. (See E 3.5) Mechanical cal linkage linkage betw between een the **E3.11.4 Linkage. Mechani disconnecti disconnecting ng means and its operating operating handle shall be 12 inch inches es or less less in leng length th and and shal shalll be such such that that the the operat operating ing handle handle is in contro controll of the discon disconnec nectt at all times. E4. Protection section shall apply apply to all industrial industrial *E4.1 Scope. This section equipment, equipment, except except bench-typ bench-typee machines powered powered by a single motor rated less than 1/4horsepower. E4.2 General. Figure re 4-1 4-1 shows shows typi typica call circ circuit uitss whic which h are E4.2.1 Figu acceptable for protection of electrical systems. *E4.2.2 Fuses for power and control shall be dual element types having a minimum interrupting capacity of 100.000 ampe ampere ress at rate rated d voltag ltage. e. Fuses ses shal shalll meet meet the the  performance standards outlined in NEMA Standard FU-1, Low Low Voltage Voltage Fuses. Fuse dimensions dimensions shall conform conform to those listed for NEMA Class H. Exception: The interrupting capacity requirement does not apply to fuses in the control circuit below the main control circuit protective device(s). Examples are those used for    prot protec ecti tion on of indiv individ idual ual sole soleno noid idss and smal smalll subsubassemblies. E4.3 E4.3 Main Main and and Bran Branch ch Cir Circuit cuit Over Overccurre urrent nt Protection. E4.3.1 The main overcurrent protection shown in line “C" of Figure 4-1, Typical Diagrams, Columns 1 through 4 inclusive, may or may not be furnished as part of the electrical system as specified In E 3.2. Where furnished as   part part of the syste system, m, it shall shall consis consistt of a single single circui circuitt  breaker or set of fuses, and the nameplate shall bear the marking required in E 2.10.1.3. Additional Overcurrent Protection. Protection. On a machine E4.3.2 Additional with with more more than than one one branc branch h circu circuit it,, addit additio ional nal over over--

current protection as shown on line ..D" of Figure 4-1, Typical Diagrams, Columns 3 and 4, shall be furnished as  part of the electrical system. Overcurrent protection, such as fuses or overcurrent trip units of a circuit breaker, shall  be placed in each ungrounded branch circuit conductor. Where Where a circui circuitt breake breakerr is used, used, it shall open all ungrounded conductors of the branch circuit. E4.3.3 Overcurrent protective devices shall be located at the point where the conductor to be protected receives its supply except as follows: Exception No. 1: Where all of the following conditions are complied with: the conductor (1) has an ampacity of at least least one-thi one-third rd that of the conducto conductorr from from which which it is

supplied, (2) is suitably protected from physica1 damage. (3) is not over 25 feet long, and (4) terminates in a single circuit breaker or set of fuses. Exception No. 2. Where all of the following conditions are complied with: the conductor (1) has an ampacity of not less less than than the sum sum of the maximu maximum m conti continu nuou ouss load load currents, (2) is not over 10 feet long, and (3) does not extend beyond beyond the control panel enclosure. E4.3.4 Selecting Overcurrent Devices. If the calculated value value for for overc overcurre urrent nt (short (short circui circuit) t) devic devices es does does not correspond to standard ratings or sizes, the next larger  size or ratin g may be used.

Figure 4-1 Typical diagrams electrical system protection Line Reference Single Multiple Motors Motor  A Supply, NE NEC Article 67 670

B

Disconnecting Means, Sect. E3

C

Supply Conductor an and Ma Machine Overcurrent Protection (when Supplied), Sect E4.3.1 Additional Ov Overcurrent Protection (as Required). Sect E4.3.2 Control Circuits. Conductors and Transformers, Sect E4.4; Undervoltage, Sect E4.5

D

E

F

Motor Controllers Sect £6

G

Motor Overload Protection, Sect E 4.6

H

Motors, Se Sect E1.4 ; Addition al al Motor Overload Protection, Sect E4.6 All Conductors, Sect. E1l

Column 1

Column 2

E4.3.5 Individual Motor Overcurrent Protection. E4.3.5.1 The overcurrent protective (short circuit) device for for a branch branch circui circuitt supply supplying ing a single single motor shall be capab capable le of carrying carrying the starting starting current current of the motor motor.. Overcurrent Overcurrent protection protection shall be considered considered as obtained obtained when the overcurrent device has a rating or setting not exceeding that shown in Table 4-1. *E4.3.5.2 Where the overcurrent protection specified in Table 4-1 is not sufficient for the starting current of the motor. it may be increased to a maximum of 200 percent of the motor full-load current for dual element fuses and 400 percent for circuit breakers. Several Motors on One Branch Circuit. Circuit. Two Two or  E4.3.6 Several more more moto motors rs and and thei theirr cont contro roll equi equipm pmen entt may may be connected to a single branch circuit provided all of the following following requirements a re complied with: (1) The maximum size of conductors connected to a motor  controller shall be in accordance with Table Table 4-2. (2) The rating rating or setting setting of the overc overcurre urrent nt protec protectiv tivee device shall be as low .as practicable and shall not exceed the values shown in Table 4-3 for the smallest conductor  in the circuit, and (3) Motor and control circuits shall be arranged so that a minimum number of branch-circuit overcurrent protective devices are required. Circuits. Overcurrent Overcurrent protectio protection n E4.3.7 lighting Branch Circuits. for lighting branch circuits shall not exceed 15 amperes. E4.4 Control-Circuit Overcurrent Protection *E4.4.1 The control conductors shall be protected against steady overloads and short circuits. An overcurrent device shall be connected in series with each ungrounded leg of  all branch control circuits. Solenoids and control shall be consi consider dered ed separat separatee branch branch circui circuits. ts. The overc overcurren urrentt

Column 3

Column 4

devices shall be rated at not more than 125 percent of the current rating of the transformer transformer and shall interrupt short circuits without damage to the transformer or conductors. E4.4.2 The rating of overcurrent protective devices in the control circuit shall be as low as practicable and shall not excee exceed d the values values given given in Table able 4-4 for the smalle smallest st conductor in the circuit. In Tables 4-4 and 4-5, the smaller  of the computed overload ratings shall be used. E4.4.3 The transformer for the control circuit shall be  protected in the secondary circuit against overloads and short short circ circui uits ts with with over overcu curre rrent nt devi device cess sele select cted ed in accordance with Table 4-5. **E4.4.4 Solenoids mounted external to the control panel and having an inrush current exceeding 150 percent of the seal sealed ed valu valuee shall shall be indiv individ idual ually ly prote protect cted ed by an indicat indicatinging-ty type pe overc overcurren urrentt protec protecti tive ve devic devicee rated rated approximately 130 percent of the sealed solenoid current. Where a fuse is used, it shall be a dual element type. The device shall be connected between the solenoid and the control relay contact.

*Table *Table 4-1—Mot 4-1—Motor or Overcur Overcurre rent nt Protec Protectiv tivee Device Device Rating

Percent of Full-Load Current Thermal Magnetic Dual Element Type of Motor  Circuit Breaker, Fuse Maximum Maximum Rating Rating of  Setting Motors Marked with Code Letter Ind icating Locked-Rotor  KVA KVA All AC Single Phase and Polyphase Polyphase Squirrel Squir rel Cage and Synchronous Motors Code Letter A 125 150 Code Letter B to E 125 200 Code Letter F to V 125 250 Motors Not Marked with Code Letter Letter Indicating LockedRotor KVA Single Phase, All 125 250 Types Squirrel Cage and 125 250 Synchronous High Reactance Squirrel Cage  Not More than 30 Amperes Full Load 125 250 Current More than 30 Amperes Full Load 125 200 Current Wound Rotor 125 150 Direct Current 125 150 For motors not included in the table refer to National Electrical Code, Article 430, Table 430-16. If the calculated value for the overcurrent (short circuit) devices do not correspond to standard ratings or sizes, the next larger size or rating may be used. *Table *Table 4-2—Ma 4-2—Maxim ximum um Conduc Conductor tor Size for NEMA Motor Controllers (Starters)† Maximum Conductor Size, Controller Size AWG or MCM 1 8 2 4 3 0 4 000 5 500 †See USA Standard C19.1, Industrial Control Apparatus

*Table *Table 4-3—Power Conductor Overcurrent Protection

Conductor  Size, AWG 14

Maximum Circuit Breaker Rating, Amperes 60

Maximum Dual Element Fuse Rating, Amperes 30

12 10 8 6 4 3 2 1 0 00 000 0000

80 100 150 200 250 300 350 400 500 600 700 800

40 50 80 100 125 150 175 200 250 300 350 400

Table 4-4—Control Conductor Overcurrent Protection Conductor Size, Maximum Rating, Amperes AWG 22 3 1/2 20 6 1/2 18 8 16 10 14 15 12 20 10 30 8 40 6 60 4 70 3 80 2 100 1 110 0 125 00 150 000 175 0000 200

*Tab *Table le 4-5— 4-5—Co Cont ntrrol Trans ransfo form rmer er Protection (115 Volt Secondary)

Over Overcu curr rren entt

Control Transformer Size, Maximum Rating Amperes Volt-Amperes 150 1.6 200 2.0 250 2.5 300 3.2 500 5 750 8 1000 10 1250 12 1500 15 2000 20 3000 30 5000 50 For For transfor transformer merss larger larger than 5000 5000 voltvolt-ampe amperes res,, the  protective device rating shall be based on 125 percent of  the secondary current rating of the transformer. E4.5 Undervoltage Protection. Undervoltage protection shall be provided for all equipment which may initiate a moti motion on upon upon return return of powe powerr afte afterr an under undervo volt ltag agee condition. E4.6 Motor Overload Protection Protection. Each moto motorr and rela relate ted d condu conduct ctor orss shall shall be E4.6.1 Each   prot protec ecte ted d agains againstt running running over overlo load ad by the use use of a separat separatee overl overload oad devic devicee respon responsiv sivee to motor motor current. current. Embe Embedd dded ed therma thermall sens sensing ing devi device cess may may be used used in addition to the current responsive devices. Exception: Short-time rated motors or high reversing duty motors which cannot be adequately protected by external overload devices shall be protected by a thermal overload device mounted in th e motor. E4.6.2 The minimum allowable number and location of  overload devices devices shall be as shown in Table 4-6. E4.6.3 The rating of the current sensing overload device shall be based on the motor full-load current, except that. if the rating does not match a standard manufactured size, the next larger standard size shall be used, taking into consideration the service factor, ambient temperature of    bot both h the the moto motorr and its its contr control olle lerr and typ type of moto motor  r  enclosure E4.6.4 Embedded thermal sensing overload devices shall   be sensitive to the temperature of the motor or to both tempera temperature ture and current current.. In additio addition, n, motors motors shall shall be   prot protec ecte ted d again against st stall stalled ed condi conditi tion onss by the use use of a separate protective device which is responsive to motor  current. E4.6.5 Resetting of the motor overload device shall not restart the motor  Standard NEMA NEMA Desig Design n B motors motors used used on **E4.6.6 Standard special special duty cycle cycle applications, applications, such as high reversing reversing duty, shall be protected by overload devices specifically selected for for the appl ication. E5. Control Circuits E5.1 Source of Control Supply. The source of supply for  control circuits shall be taken from the load side of the main disconnecting means.

E5.2 Control Voltage. Voltage. E5.2.1 AC control voltage shall be nominal 115 volts, single phase, obtained from a transformer with an isolated secondary winding, except as follows: follows: Except Exception ion No.1: No.1: Other Other volta voltages ges may be used, used, where where necessary, for the operation of electronic, static or similar  devices used in the control circuit. These special voltages shall be obtained from separate two-winding tra nsformers. Exception No.2: Exposed, grounded control circuits may   be used when when suppli supplied ed from from an isolat isolating ing transfor transformer  mer  having a primary rating of not more than 115 volts, a secondary rating of not more than 25 volts and a capacity of not more than 50 volt-amperes. **A complete description of the circuit and the reason for  its applica applicatio tion n must must be presen presented ted to and permis permissi sion on obtained from the purchaser in writing before such circuit is used. magnetic device having an in- rush Exception No.3: Any magnetic curre current nt exce exceed eding ing 20 ampere amperess at 115 volt voltss may may be energiz energized ed directl directly y from from the line through through contac contacts ts of a contactor or relay rated for line voltage. The coil of the contactor or relay shall be fed from the 115 volt control circuit Exception No.4: Control voltages less than 115 volts may  be used where components rated for 60 cycles are applied to a lower frequency (e.g., a coil rated at 115 volts, 60 cycles, maybe applied to 95 volts, 50 cycles). E 5.2.2 DC control voltage shall not exceed 250 volts. Exception: Other voltages may be used, where necessary, for for the opera operati tion on of elec electr troni onicc devi device cess used used in the electrical system. system. E5.3 Connection of Control Devices. Indicator lamps, or transformer transformer primary windings windings E5.3.1 Indicator for Indicator lamps, and operating coils of control devices shall be connected to the same side of the control circuit. Contacts shall be connected in the other side of the control circuit. verloa oad d rela relay y conta ontact ctss may may be Except Exception ion No.1 No.1: Overl conne connect cted ed to the right right of the coil coil (com (commo mon) n) If the condu conduct ctor orss betw betwee een n such such conta contact ctss and coil coilss of the magne magneti ticc devi device cess do not exte extend nd bey beyond the contr control ol enclosure. Exception No2: Where relay and electronic circuits are mixed, control contacts in the electronic circuit may be connected as required. Contacts ts shall shall not be connec connected ted in paralle parallell to E5.3.2 Contac increase ampacity elayss use used for sele electin cting g "Man "Manua ual" l" or  *E5.3.3 Relay .'Auto .'Automat matic" ic" circui circuits ts shall shall be energiz energized ed through through push  buttons located at the operator's main control station. The circuit shall be protected from undervoltage and return to the "Neutral" mode upon power failure, thus requiring the operator to select the "Manual" or "Automatic" mode E5.3.4 Separately mounted solenoid or magnetic brakes may be connected directly across motor terminal leads. **E5.3.5 Solenoids shall be relay controlled with separate normally-open contacts of the same relay connected in each lead of the solenoid. Not more than two contacts shall shall control control any solen solenoid. oid. (See (See Sample Sample Elemen Elementary tary Diagram, Appendix B).

Exception: Where a grounded control circuit is specified, a single normally-open contact shall be connected in the ungrounded lead of the solenoid. E5.4 Circuit Design and Interlocking *E5.4.1 Where improper sequencing may create a hazard or cause damage to the equipment or work in process,  protective interlocks shall be provided. These interlocks shall give protection against both: (1) Failure of one or more devices to function properly, and (2) (2) Impr Improp oper er sequ sequen enci cing ng in manu manual al or auto automa mati ticc operation. For setu setup p purpo purpose ses, s, manua manuall means means,, prefe prefera rabl bly y by   pushbu pushbutto ttons, ns, shall shall be provi provided ded to perfor perform m individ individual ual functions. Direct operation of solenoid valves with rods or  tools is not considered “manual means.” *E5.4.2 Where applicable, the requirements of E 5.4.2.1 through E5.4.2.19 inclusive shall be provided. E5.4.2.1 Opposing Motions Interlocked. Starters, relays, conta ontact ctor orss and sole soleno noid idss whic which h are are mech mechan anic ical ally ly interlocked shall also be electrically interlocked to prevent simultaneous energization. Plugging ing Circuit Circuits. s. Pluggin Plugging g switc switches hes or zero zero E5.4.2.2 Plugg speed switches, used to control the application or removal of power, power, in order that tha t moving pa rts may be slowed down, stopp stopped, ed, or revers reversed, ed, shall shall be provid provided ed with with featu features res incorp incorporat orated ed in the control control circuit circuit to (1) preven preventt the reappl reapplic icat atio ion n of powe powerr afte afterr the comp comple leti tion on of the   plugg plugging ing operat operation ion,, and (2) preven preventt the applica applicatio tion n of    powe powerr through through any manual move movemen mentt of the plugging plugging switch switch shaft or of the motor or equipment. Timing relays are not permitted for plugging motors used for tapping at the end of the forward stroke. De-energization. "Stop" functions shall E5.4.2.3 "Stop" by De-energization.   be be init initia iate ted d thro throug ugh h de-e de-ene nerg rgiz izat atio ion n rath rather er than than energization of control devices where possible. E5.4.2.4 Movement Initiation by Limit Switches. Control circuits shall be designed so that when the equipment is in its "home" or "end of cycle" position, movement of any  part of the equipment can be initiated by limit switches only if all of the following conditions are met: (1) The control is set for automatic operation, (2) The control is of the holding circuit type, is energized, and (3) The condition condition of the automatic operation operation is indicated  by pilot lights. E5.4.2.5 "Jog" ("Inch") Circuits. "Jog" ("Inch") circuits shall be designed so that the prevention of "Run" or " Automatic" operation during jogging shall be inherent. *E5.4.2.6 "Anti-Repeat" Operation. On equipment where conti continu nuou ouss cons consec ecut utiv ivee cycl cycles es of opera operati tion on of the equipment are not a normal or a desired operation, the circuit shall be arranged so that such operation cannot be obta obtaine ined d by the use use of any butt button on or contr control ol means means avai availa labl blee to the equi equipm pment ent opera operato torr. Spec Specif ific ical ally ly,, continuous consecutive cycles shall not result even though the "Cycl "Cyclee Start" Start" button button(s) (s) is held continuous continuously ly in the "Start" position. Timers shall not be used in anti-repeat circuits. pindle le Dri Drive Inte Interl rloc ock ked with ith Feed. E5.4.2.7 Spind Interlocking shall be provided to insure that the spindle

drive motor contactor is energized before the tool is driven into the work piece while in t he "Automatic" cycle. cycle. Contact ctor or for for Contr Control ol Circu Circuit it Load Loads. s. The E5.4.2.8 Conta auxiliary contact on any starter or contactor shall not be used in excess of its rating for carrying control circuit loads. An additional relay or contactor shall be used for  this purpose. Changi ging ng from from Rapi Rapid d Trav raverse erse to Feed. eed. E5.4.2.9 Chan Hydraul draulic ical ally ly actu actuat ated ed heads heads shall shall not not requ require ire an energizing operation to change from rapid traverse to feed rate. E5.4.2.10 One Station for Motor Starting. There shall be only only one station station effe effecti ctive ve at any time for for starting starting all motors motors concurrently concurrently.. Howe However ver,, multiple multiple "Stop" "Stop" stations stations may be used. *E5.4.2.11 Overspeed Protection for DC Motors. Shunt and compound-wound DC motors shall be equipped with overspe overspeed ed or field-los field-losss protection protection to prevent prevent excessiv excessivee motor speed. Sequence nce Contro Controll by Press Pressure ure Swit Switche ches. s. E5.4.2.12 Seque Pressure switches alone shall not be used to determine sequence or operation. E5.4.2.13 Rotary Cam Limit Switches Used as Sequence Contr Control ol.. Rotar otary y cam cam swit switch ches es shall shall not not be used used as sequence controls on equipment unless the position of the equipment component or the location of the material in   process is indicated by separate controls, such as limit switc switches hes,, which which are interlo interlocke cked d with with the rotary rotary cam switch. Exception: This requirement does not apply to presses *E5.4.2.14 Control Control or Valves. alves. Electricall Electrically y controlled controlled (sol (solen enoi oid) d) hydra hydrauli ulicc and pneuma pneumati ticc valv valves es shall shall be appli applied ed in such such a manner manner that in the event event of pow power  fail failur uree ther theree will ill be no haza hazard rd or dama damage ge to the the equipment. (1) Workpie orkpiece ce clampin clamping g applic applicati ations. ons. The clamping clamping solen solenoid oid valve valve shall shall remain remain energi energized zed througho throughout ut the worki orking ng cycl cyclee and and unti untill the the uncl unclam amp p sole soleno noid id is energized. Example: Example: Clamps Clamps actuat actuated ed by hydrau hydraulic lic or pneumati pneumaticc means and controlled controlled by two-positi two-position, on, double-s double-solen olenoidoidoperated four-way valves. (2) Indexing applications. Exam Exampl plee No. 1: Hydrau drauli licc inde indexi xing ng mech mechan anis isms ms controlled controlled by three-positi three-position, on, spring-centered, spring-centered, doubledoublesolenoid-operated four-way valves. Exam Exampl plee No.2: o.2: Pneu Pneuma mati ticc inde indexi xing ng mech mechan anis isms ms controlled by two single-solenoid, spri ng-offset, ng-offset, three-way thr ee-way valves; or a two or three-position four- way valve. valve. Two push buttons shall **E5.4.2.15 Two-Hand Operation. Two  be provided for each operator for protection against pinch  points or other movement hazards and shall include all of  the following. (1) The circuits circuits shall require maintained depression depression of  each each butt button on throu through ghou outt the cycl cyclee or until until a point point is reached in the cycle where the hazard ceases, (2) Each pair of buttons shall be located and arranged so that operation by means other than the two hands of the operator is prevented, and

(3) The circuit shall be designed and wired so that the equipment cannot be operated unless both buttons at each station are released between successive successive operations. **E5.4.2.16 Multiple Start Stations. Where more than one cycle start station is provided, all "Start" buttons shall be concurrently concurrently depressed depressed to initiate the cycle, cycle, and released released   betw between een succe successi ssive ve operati operations, ons, unless unless interlo interlockin cking g is  provided to require either (1) the use of one station at a time, time, or (2) the initiati initiation on of the cycl cyclee by depres depressing sing  buttons in a specified sequence. **E5.4.2.17 Limit Switch Interlocking. Where necessary, limit switches shall be interlocked by the use of both the norma normall llyy-op open en and the normal normally ly-c -cllosed osed conta contact ctss to   prevent damage caused by sticking of the switch in the tripped position. Indexing ing Interl Interloc ocke ked d with with Full Full Depth Depth **E5.4.2.18 Index Operation. In the "Automatic" mode, interlocking shall be  provided on indexing equipment so that each head must reach reach the the full full limit limit of its its opera operati tion on and retur return n to its starting position before before indexing can occur. **E5.4.2.19 Independent Return of Heads Such as Drills, Taps and Reame Reamers. rs. Each head head unit shall return to its start starting ing posi positi tion on upon upon compl complet etio ion n of its its feed feed cycl cyclee Independently of other units. E5.4.3 Whenever practicable, limit switches shall be used to (1) sense the position of equipment elements and parts in process, and (2) control the proper sequencing of the equipment Hinged ed or slidi sliding ng doors doors ,to ,to comp compart artme ment ntss E5.4.4 Hing containing belts, gears or other moving parts which may expose hazardous conditions, shall be interlocked through limit switches switches or other means to prevent equipment from operating when doors are not closed. E6. Control Equipment E6.1 Standards. E6.1.1 Control devices shall conform to USAS Standard C19. C19.1, 1, Indu Indust stri rial al Cont Contro roll Appa Appara ratu tus, s, and and NEMA NEMA Standard IC-1, Industrial Control. Polypha phase se contro controll apparatu apparatuss shall shall confor conform m to E6.12 Poly USAS Standard C 19.1. Industrial Control Apparatus, and  NEMA Standard Standard IC1, Industrial Control, and be suitable suitable for 600 volt service regardless of voltage applied. Controll circui circuitt transfor transformer merss shall shall conf conform orm to *E6.13 Contro  NEMA Standard ST-1, Specialty Transformers, Section 4, Machine Tool Transformers, and shall be Type 1, without integral overcurrent protection. The transformer primary winding shall be dual rated 240/480 volts at 60 cycles with a single secondary secondary winding rated 120 volts. volts. Ratings for other frequencies shall be as specified in the NEMA standard. Exception: Transformers rated less than 75 volt- amperes (e.g., for use in combination motor starters) shall conform to N EMA Standa andarrd ST-1, Section 3, Contr ontro ol Transformers. Control devices devices external to the control control enclosure, enclosure, E6.1.4 Control such as limit switches switches,, pushbuttons, pushbuttons, selector selector switches switches,, valve solenoid enclosures and pressure switches, shall be oil-tight. E6.1.5 Precision and other small devices used for control "whi "which ch do not come come withi within n the scop scopee of the abov abovee standards shall conform to applicable accepted standards.

E6.2 General Requirements. devices shall be frontfront*E6.2.1 Panel mounted control devices mounted, connected and wired. Exception: This does not apply to such direct current and large large alternat alternating ing current current equipm equipment ent not comme commerci rciall ally y available for front connection. (See E 7.5.2) *E6.2.2 Screw-type terminals with captive saddle straps or equivalent means of retaining stranded conductors shall  be provided on control devices. .Exception: This requirement does not apply to devices mounted external to the control enclosure and normally equipped with leads, such as valve solenoids and clutches. (See E 6.2.4) Control device devicess and coils coils shall be marked in E6.2.3 Control accordance with published pertinent standards or with the make maker' r'ss name name or trad tradem emar ark, k, orde orderi ring ng numb number er and applicable applicable descriptiv descriptivee electrical electrical specifi specification cationss such as voltage and frequency. Exception: Where the device is too small to identify, the information shall be shown on the diagram or stock list. *E6.2.4 Electrically energized devices located external to the contro controll enclo enclosur sure. e. such such as clutch clutches, es, soleno solenoids ids and other coil-operated devices, shall be enclosed and include an. oiloil-ti tight ght encl enclos osure ure for for condu conduit it termi terminat natio ion n and connection purposes. Coils shall have leads which extend a minimum of four inches outside the enclosure. Leads shall be equipped with pressure connectors. Connections shall be bolted and taped. Control ol conta contact ctss opera operate ted d by slow slow movi moving ng E6.2.5 Contr mechanisms shall be of the quick-make and quick-break  type. Exception: This does not apply to pushbuttons, selector  switches or instruments **E6.2.6 The application of limit switches having more than one normally-open normally-open an d one normally-close normally-closed d pole shall require the purchaser's approval. **E6.2.7 Solenoids used for actuating valves, brakes and other mechanisms shall have a continuous duly rating. **E6.2.8 Additional transformer capacity of 25 percent above requirements, but not less than 100 volt-amperes nor more than 1000 volt-amperes, shall be furnished, or a separate transformer shall be provided and mounted on the control panel. Exception: Exception: This requirement does not apply to control transformers used in combination motor starters. **E6.2.9 Rectifiers used in a control circuit for dynamic   braking of AC motors shall be supplied supplied from isolating isolating transformers other than the regular control transformer. **E6.2.10 Relays shall have a complete set of contacts (e.g., a four-pole block shall have all contacts furnished). **E6.2.11 The following devices should not be used: (1) Stepping switches (2) Push selector switches for start-stop operations (3) Latch relays, except for memory indication (4) Relays with overlapping contacts (5) Neutral position switches E6.3 Motor Starters Across-th s-the-l e-line ine starting starting shall shall be employ employed ed for  E6.3.1 Acros alternating current motors. Exception No. 1: Where the purchaser specifies otherwise.

Exception Exception No.2: Where the equipment equipment requires limited accelerating torque. E6.3.2 Alternating current motor starters shall open all of  the power conductors connected to associated motors. E6.3.3 Several motors may be controlled by one starter or  contactor if all of the following following are complied with: (1) Ratings of the starter or contactor for horsepower horsepower,, locke locked d rotor rotor current current and other other charact characteris eristic ticss listed listed in   NEMA Standard IC-1, Parts 21B and 27B, shall not be exceeded, (2) Each motor shall have individual overload relays, and *(3) All overload relays shall be the same make. E6.3.4 The rating of starters for plug-stop, plug-reverse, or jogging jogging duty requiring repeated repeated interruption interruption of stalled moto motorr curre current nt or repe repeat ated ed clos closing ing of high high transi transien entt currents encountered encountered in rapid motor reversal reversal involving more than five openings per minute shall be in accordance with Table 6-1. E6.3.5 Conversion equipment, such as from AC to DC, shall shall be furnish furnished ed for for any elec electric trical al apparatus apparatus unless unless otherwise specified by the purch aser. *E6.3.6 Polyphase motor starters shall be of the magnetic type and shall not be smaller than N EMA Size 1. For  alternating current motors the starter shall be capable of  interrup interrupting ting the stalle stalled d rotor rotor current current of the motor motor or  motors. E6.4 Group Starting of Motors . The starting of motors shall be in sequence so that a group of motors started simultaneously will not exceed either of the following. (1) An aggregate of 100 horsepower, when the smallest motor of the group is 10 ho rsepower rsepower or larger, or  (2) An aggregate of 75 horsepower, when the smallest motor of the group is 7 1/2 horsepower or smaller. *Table 6-1—Starter Rating for Plug-Stop or Jogging Duty† Maximum Horsepower Horsepower rating ratin g 230 Volts, 460/575 Volts, Size Starter  Three Phase Three Phase 1 3 5 2 10 15 3 20 30 4 30 60 5 75 150 6 150 300

†See NEMA Standard IC-1, Industrial Control E7 Control Enclosures and Compartments E7.1 General. This section does not apply to combination motor starters except that they shall be in NEMA Type 12 enclosures. Control enclos enclosure uress and compar compartmen tments ts shall shall be E7.1.1 Control constructe constructed d in conformanc conformancee with applicable applicable sections of  this standard and both of the following: (1) NEMA Type 12 (See NEMA Standard IC-l, Industrial Control) (2) (2) Unde Underw rwri rite ters rs Labor aborat ator orie iess Stan Standa dard rd UL 508, 508, Industrial Control Equipment Exception: Equipment normally requiring ventilation may   be house housed d in ventila ventilated ted enclosur enclosures es or compar compartme tments, nts,

 provided they are located so that the equipment is capable of operating satisfactorily and without hazard. *E7.1.2 Where heating from control devices results in a tempera temperature ture rise rise which which is detrime detrimental ntal to the containe contained d equipment or its operation, forced air ventilation or forced circulated air shall be used. Any ventilating opening shall   be designed to prevent the entrance of any deleterious substance. substance. When forced air ventilation ventilation is required, required, the cabi cabine nets ts shal shalll be pres pressu suri rize zed. d. Air Air filt filter erss shal shalll be commercially available types types and sizes. E7.1.3 The thickness of sheet steel used for walls and doors of enclosures or compartments shall be as shown in Table 7-1. Except Exception ion No. No. 1: If a suppor supporting ting frame frame or equiva equivalent lent reinf reinfor orce ceme ment nt is used used,, the minimu minimum m encl enclos osur uree wall wall thickness for areas over 1200 square inches shall be 0.075 inch if made of sheet steel. Except Exception ion No.2: No.2: The thickne thickness ss of walls walls and doors doors of  compartments shall be a minimum of  1/8 inch for cast material. E7.1.4 The depth of the control enclosure or compartment should be a minimum consistent with the maximum depth of the contr control ol devi device cess plus plus the requi require red d elec electri trica call clearances **Exce **Excepti ption on No. No. 1: In no case shall the depth depth of the enclosure be less than eight inches. **Exception No.2: When the panel area of floor- mounted enclo enclosure suress exce exceeds eds 3600 square square inches. inches. the minimum minimum depth shall be 12 inches. *E7.1.5 The height and width of the door opening shall  be at least one inch greater than the corresponding corresponding height and width of the control panel to be enclosed. E7.1.6 A permanent metal data pocket shall be attached to the inside inside of the enclos enclosure ure or compar compartme tment. nt. If space  permits, the pocket should be at least 10 1/2 inches wide and of adequate depth and thickness to accommodate all electrical diagrams. Compartment ent doors, doors, enclos enclosure uress and enclo enclosur suree E7.1.7 Compartm doors shall be designed to h ave sufficient sufficient rigidity to assure continuing proper alignment between mating parts, such as door fasteners and locking devices. Door align aligning ing guid guides es may may be used used to insure insure E7.1.8 Door alignment. Reinforcements shall be used, as necessary, to  prevent door warpage. The interi interior or of encl enclos osure ure and panel panel shall shall be E7.1.9 The finished in a light color . E7.2 Size Definition. E7.2.1 A small enclosure or compartment is one which accomm accommoda odates tes a panel panel having having less less than 1500 1500 square square inches of area. E7.2.2 A large enclosure or compartment is one which accommodates a panel(s) having 1500 square inches or  more of area. E7.3 Enclosures. *E7.3.1 Mounting feet or other suitable means external to the enclosure shall be provided for equipment-mounted enclosures. Separately mounted enclosures shall be freestanding. There shall be no holes holes in the enclos enclosure ure for  *E7.3.2 There mounting the enclosure or mounting controls within the enclosure.

**E7.3.3 There shall be no knockout holes through the enclo enclosur suree for for mounting mounting compon components ents on the enclo enclosure sure except as provided in E8.2.3. **E7.3.4 Conduit or wireway openings shall be cut only as required. One additional hole may be cut in the side or    bott bottom om for for tempor temporary ary power power line connec connecti tion. on. Where Where wireway and conduit are disconnected for shipment, such openings shall be sealed prior to shipment. **E7.3.5 Other equipment shall not be mounted on the exterior of the control enclosure unless specified by the  purchaser. E7.4 Compartments. Compart artme ments nts for for buil built-i t-in n contr control olss shall shall be E7.4.1 Comp isolated from coolant and oil reservoirs. Compartmen tments ts shall shall be readily readily access accessibl iblee and E7.4.2 Compar enclosed. E7.4.3 Compartments shall not be considered enclosed if  they are open to (1) the floor. (2) the foundation on which .the equipment equipment rests, or (3) other compar compartme tments nts of the equipment which are not clean and dry. E7.4.4 Where ventilation is required, the requirements of  E 7.1.1 and E7.1.2 shall apply. E7.5 Doors. E7.5.1 Hinged doors which swing horizontally shall be  provided for control enclosures and compartments. E7.5.2 Control enclosures containing panels with backconnec connecte ted d devic devices es shall shall be equipp equipped ed with with rear access access doors to those panels. (See E 6.2.1). E7.5.3 Doors shall not exceed 36 inches in width. *E7.5.4 Door swing shall be a mini mum of 165 degrees. **E7.5.5 Door swing shall be such that ready access to the disconnect handle is not blocked. **E7.5.6 Doors on large enclosures should be reinforced to prevent door warpage. Welded construction should be used. Continuous hin ges (piano type), type), welded welded in **E 7.5 7 Continuous  place, are preferred for all enclosure doors. E 7.6 Door Fasteners. . astene ners rs on smal smalll encl enclos osur ures es and and *E7.6.1 Door faste compartments shall be designed to seal the door tightly around its perimeter Vault-type hardware, which latches simultaneously at the top and bottom. shall be used on small enclosure doors. fasten ener erss on larg largee encl enclo osures ures and and E7.6.2 Door fast compartments shall be designed to seal the door tightly around its perimeter. Vault-type hardware, which latches simultaneously at the top, center and bottom, shall be used on large enclosure doors. vault-typ typee hardwar hardwaree in both both E7.6.1 E7.6.1 and **E7.6.3 The vaultE7.6.2 on the door enclosing the disconnecting means shall be interlocked with the disconnecting means. (See E3.9 and E3.10) Table 7-1—Metal 7-1—Metal Thickness for Walls and Doors Doors of  Enclosures or Compartments

Maximum Area of Any Surface, Square Inches Less than 360

Maximum Dimension, Inches 18

Minimum Thickness (Nominal) of Metal, Inches 0.075

Equivalent Manufacture r’s Standard Gauge, MSG 14

360 1200 1500 Over 1500

24 48 60

0.075 0.075 0.106 0.132

14 14 12 10

E8. Location and Mounting of Control Equipment E8.1 General Requirements. Contro roll equip quipme ment nt exte extern rnal al to the the contr ontrol ol E8.1.1 Cont enclo enclosure sure,, such such as limit limit switc switches hes,, pressur pressuree switc switches hes,,   brakes, solenoids, pushbutton stations, etc., shall be (1) mounted rigidly in a readily accessible and reasonably dry and clean location, (2) provided with adequate clearance for replacement, and (3) free from accidental operation by normal movement of machine components or operator  Control olss shou should ld be mount mounted ed on an exter exterio ior  r  *E8.1.2 Contr surface of the equipment between 1 1/2 and 7 feet, but in no case less than 12 inches, above the operating floor line. Terminal erminal block blockss shall shall be mounted mounted a minimum minimum of 18 inches above the operating operating floor floor line. Terminal Terminal blocks blocks located in compartments at sectional points shall not be rece recess ssed ed more more than than four four inche inchess from from the equi equipm pment ent surface. Control ol equi equipme pment nt shall shall be so mount mounted ed and E8.1.3 Contr located that it will not interfere with machine adjustments or maintenance. E8.1.4 Pipe lines, tubing or devices for handling air, gases or liqu liquid idss shall shall not be loca locate ted d in elec electri trical cal contr control ol enclosures or compartments. erminal block blockss shall shall be mounte mounted d to provid providee E8.1.5 Terminal unobstructed access to the terminals and their conductors. The blocks shall not be mounted above each other in a  plane perpendicular to the panel. *E8.1.6 Separately-mounted terminal strips shall be used for power circuits and control circuits. E8.2 Control Panels. *E8.2.1 Control devices, normally panel-mounted, shall  be mounted in one enclosure or compartment. E8.2.2 Starters, contactors and other control devices shall   be be front front-m -mou ount nted ed on a rigid rigid metal metal panel panel so that that the compl complete ete panel panel can be remov removed ed through through the enclo enclosure sure opening Such panel shall be a minimum of 0.106 inch, nominal ( MSG No 12) for mounting devices with screws 1/4 inch or smaller. Additional reinforcement or heavier  gage gage panels panels shall shall be provi provided ded where where larger larger screw screwss are required. All mounting screws shall have the Unified form of thread. thread. Equip Equipme ment nt shall shall be mount mounted ed so that that any component can be replaced without removing the panel.   No No compo component nentss shall shall be mounted mounted behind behind door door pillars pillars unless adequate adequate space is provided for replacement replacement and servicing. *E8.2.3 Control equipment shall not be mounted on the door or sides of the enclosure except for such devices as   pushb pushbutt uttons, ons, select selector or switc switches hes and pilot pilot lights. lights. Such Such devices shall be wired from terminal strips on the control  panel. E8.2.4 Swing-out panels located between the enclosure or  compartment door and the control panel shall not be used. Exception: Electronic panels may be of the swing-out or  sliding type for servicing.

Panel-mou mounte nted d control control compo component nents, s, such such as *E8.2.5 Panelrelays, shall be mounted in numerical order from left to right and top to bottom corresponding to the panel layout. Starters and contactors should be mounted in a similar  manner  Any devi device ce(s (s)) mount mounted ed on the contr control ol panel panel E8.2.6 Any carrying line voltage or a combination of line voltage and control voltage, shall be grouped above or to the side and segreg segregate ated d from from devic devices es which which carry carry only only the control control voltage. This does not apply where the line voltage is 115 volts. In no case shall any device he mounted directly above the disconnecting means. *E8.2.7 Spare terminals shall be provided on each control  panel. The number shall be ten percent or the total in use on the panel or a minimum or eight for control conductors and th ree for power conductors. conductors. E8.2.8 Where required for maintenance, space shall be  provided adjacent to all devices mounted on the control  panel. minimu mum m or 15 perc percen entt or clea clearr pane panell **E8.2.9 A mini mounting space shall be provided on large panel and 30   percent on small panels to permit adding future control devices. On large panels, the total space should be divided into two or more more space spacess (See (See Appendi Appendix x B, Panel and Control Station Layout) Layout) Exception: This does not apply to combination starters. E8.3 Control Panel Enclosure. E8.3.1 The enclosure shall be mounted in such a manner  and position as to guard it against oil, dirt, coolant and dust, and to minimize the possibility of damage from floor  trucks or other moving equipment. E8.3.2 The panel shall not be set to such depth from door  frame or other projecting portion of the equipment as to interfere with inspection and servicing. E8.3.3 No portion of the equipment immediately above the door opening and less than six feet from the floor  should should project project more more than six inches beyond beyond the door  door  frame. **E8.3.4 The bottom of the lowest panel-mounted control device shall not be less than 18 inches above the operating floor line. In no case shall the top of panel- mounted contr control ol devi device cess be more more than seve seven n feet feet abov abovee the operating floor line. E8.4 Clearances in Enclosures. E8.4.1 Enclosures or compartments for mounting control  panels shall provide ample room between the panel and the encl enclos osure ure for for prop proper er maint maintena enanc ncee and wirin wiring g to terminals. E8.4.2 Exposed, non-arcing, current-carrying parts within an enclo enclosur suree or compar compartme tment nt shall shall have an air space space  between them and the uninsulated walls of. the enclosure or compartment, other than the device-mounting plate or   panel, including conduit fittings, of not less than one-half  inch for 250 volts or less, and not less than one inch for  voltages between between 250and 600 volts. Where barriers barriers betw between een metal metal enclos enclosure uress or  E8.4.3 Where compartments and arcing parts of control are required, they they shall shall be of flameflame-reta retardant rdant insulat insulating ing material materialss which will not readily carbonize.

E8.5 Miscellaneous Control Equipment Limit swit switches ches or posit position ion-se -senso nsors rs and their  their  E8.5.1 Limit associated actuators shall be installed so that accidental overtravel will not damage them. Limit swit switch ch actuato actuators rs shall shall be designe designed d and E8.5.2 Limit applie applied d in accorda accordance nce with with the switc switch h manufac manufacture turer's r's speci specific ficati ations ons for for travel, travel, f1y f1y-back -back and other other related related characteristics,

Solenoid oidss shall shall be accessi accessible ble and shall shall not be E8.5.3 Solen submerged in oil. Exception: Where the solenoid is sealed in an individual oil-filled container. E8.5.4 Solenoids for operating devices shall be mounted so that liquids will drain away from the enclosure. E8.5.5 Devices with a rotating member shall be mounted so as to prevent rotation of the station ary member. member. Plug-in in devi device cess and asse assemb mbli lies es shou should ld be E8.5.6 Plugmechanic mechanicall ally y secur secured. ed. Automat Automatic ic locki locking ng upon upon full full insertion is preferred. E8.5.7 Female threaded fasteners, providing at least two full threads engagement, may be used to mount devices on readily removable sub-assemblies. sub-assemblies. E9. Operator's Control Stations and Devices E9.1 Device Requirements. Pushbutton operators, operators, selector selector switch switch operators operators E9.1.1 Pushbutton and indicating lights shall be of the oil-tight type. Pushbutt utton on operat operators ors shall retain retain their their color  color  E9.1.2 Pushb identificat identification ion throughout throughout their life. life. The color color code code for   push buttons shall be as shown In Table Table 9-1. E9.1.3 Emergency pushbutton operators shall be of the  palm or mush room type. E9.1.4 Palm or mushroom type buttons shall not be used in start start circui circuits, ts, unless two or more more are connecte connected d in series. E9.1.5 “ST ART”. button operators shall be of the fullyguarded type

*Table 9-1—Pushbutton Color Code

Color Red Yellow

Black 

Typical Function Stop, Emergency Stop Return, Emergency Return Start Motors, Cycle, etc. Any operation for  which no other color is specified

Example Stop of one or more motors, master stop. Return of machine elements to start position. Start of one or more motors, start cycle or partial sequence.

*Table 9-2—Pilot Light Lens Color Code

Color

Typical Function

Red

Danger, Abnormal Condition, Fault Condition

Amber  (Yellow)

Attention

Example Voltage applied: cycle in automatic: faults I air, water, lubricating or  filtering systems: ground detector systems. Motors running, machine in cycle,; unit or head in forward position.

Green

Safe Condition (Security)

White or  Clear 

 Normal Condition

End of cycle, unit or head returned; motors stopped; motion stopped; contactors open.  Normal pressure or air, water, lubrication

*Table 9-3—Multiple Station Pilot Light Requirements Color Typical Function Example Red

Amber  (Yellow) Green White or  Clear 

Power On, Emergency On, Automatic Cycle Motors Running, Machine in Cycle, Full Depth End of Cycle, Heads in Returned Position Parts in Place, Lubrication Normal, Pressure Normal (Water, Air, Air, Gas) G as)

Ground detectors; lubrication failure; master  relay on; pressure failure(water, air, gas). Machine elements in advanced position; manual cycle.

E9.1.6 The color code for pilot lights shall be as shown in Table 9-2. .”STOP" P" button button operat operators ors shall be of the un**E9.1.7 .”STO guarded type. Indicating ng lights lights shall shall be of the push-t push-to-t o-test est **E9.1.8 Indicati typ type, powe powere red d by indiv individ idua uall trans transfo form rmers ers mount mounted ed integrally with the lamp base. The secondary voltage shall  be less than six volts for use with six volt lamps. E9.2 Fixed Stations. E9.2.1 Fixed control stations shall be dust, moisture and oi1-tight, complete with metal enclosure and cover  *E9.2.2 Pushbutton and pilot light enclosures with six or  more units, shall be equipped with hinged covers. *E.9.2.3 Where more than 16 units are required, terminal strips shall be furnished in the enclosure. E9.3 Control Station Component Arrangement. "START” T” buttons s hall be mounted above or to the E9.3.1 "STAR left of their associated "STOP" buttons. Exception: This requirement does not apply to "ST ART”  buttons in series. E9.3.2 A legend (name) plate 'shall be provided for each contro controll statio station n compo component nent to identif identify y its functi function on and located so that it can be read easily by the equipment operator from his normal work position. Markings on the   plat plate: e: shall shall be perm permane anent, nt, such such as by embos embossi sing ng or  engraving E9.4 Control Station Location. Control stations stations shall be mounted in a reasonably E9.4.1 Control clean and dry location E9.4.2 Control stations shall be located within easy reach of the equipment operator and placed so that the operator  does not have to reach reach past past spindl spindles es or other other moving moving  parts. E9.4.3 Controls shall be free from possibility of accidental operation either by normal movement of the equipment or  the operator. *E9.4.4 Pushbuttons shall be mounted on a surface which is not less than 45 degrees from the horizontal plane. Pipe lines, lines, tubing tubing or devic devices es for for handling handling air, air, E9.4.5 Pipe gases, or liquids shall not be located in control stations.

**E9.4.6 Ground detector lamps shall be mounted on the front of the main control enclosure (See E15.1.1) E9.5 Pendant Stations E9.5.1 Pendant stations shall be oil-tight. E95.2 A wobble stick or rod operator at .the bottom of the station may be used for “EMERGENCY STOP" control. E9.5.3 Pendant push button stations shall be supported by suitable means other than the flexible electrical conduit or  multiconductor cable. E9.5.4 For grounding requirements, see E 15.3. **E9.6 Multiple Station Equipment **E9.6.1 Pilot lights shall be furnished to show (1) the   posit position ion of mechanic mechanical al comp componen onents, ts, such such as clamps clamps,, trans transfe fers rs,, trans transfe ferr finge fingers rs and loca locato tors rs,, and (2) (2) the functions shown in Table 9-3. **E9.6.2 Pilot Lights shall be located at the main control station and arranged in accordance with the sequence or  operations. **E9.6.3 Pushbuttons shall be provided at the operator's main main contr ontrol ol stat statio ion n to prov provid idee compl omplet etee manu manual al operation in accordance with the sequence of operation. operato tor' r'ss contr control ol stat station ion,, incl includi uding ng a **E9.6.4 An opera selec selector tor swit switch, ch, shall shall be provid provided ed at each each station station for  manual operation of individual individual heads. The control circuit shall be interlocked to prevent operation from the main control station when the local selector switch is set in either "MANUAL” or "OFF" position. The nameplate on the the sele select ctor or swit switch ch shal shalll read read from from left left to righ right, t, “AUTOMATIC-MANUAL-OFF”. E10. Electrical Accessories E10.1 Plugs and Receptacles. E10.1.1 Plugs and receptacles shall be approved for the voltage applied and conform to all of the following: following: (1) A locking locking feature to prevent accidental d disconnections. isconnections. (2) A skirt or shroud that will contain any arc and will  protect the poles when not in use. (3) (3) A gromm grommet et around around the cord cord whic which h will will prev prevent ent entrance of contaminants and (4) Means which effectively seal the receptacle when ever  the plug is removed. Exception: Items (3) and (4) above do not apply to subassemblies mounted within the control enclosure. E10.1.2 Plugs and receptacles shall be provided with a grounding pole and so constructed that the grounding pole is made before any current-carrying poles are made and is not broken until all current carrying poles of the plug have been disconnected. E10.1.3 The grounding pole or both plugs and receptacles shall only be used for grounding purposes and not as a normal current-carrying pole. E10.2 Work Lights circuit voltage shall not exceed exceed 150 E10.2.1 The lighting circuit volts between conductors. E10.2.2 Work lights, where furnished, shall be supplied from one or th e following sources: (1) A separate isolating transformer connected to the load side of the equipment disconnecting means. Overcurrent  protection shall be provided in secondary circuit.

(2) The 115 volt control circuit, with separate overcurrent   protection for the lighting circuit. This system may be used only with a grounded control circuit. (3) The plant lighting circuit. (4) The line side of the main disconnecting means where a sepa separa rate te prim primar ary y disc discon onne nect ctin ing g mean means, s, isol isolat atin ing g transfor transformer mer and secon secondary dary overc overcurre urrent nt protec protecti tion on are furnish furnished ed in a NEMA NEMA Typ Typee 1 enclos enclosure ure and mounted mounted withi within n the contr control ol encl enclos osure ure,, adja adjace cent nt to the main main disconnecting means. conductors to stationary or built-in lights  E10.2.3 The conductors shall conform to E11, Conductors. The conductors within fixtures shall be not smaller than AWG AWG No.18.  E10.2.4  Flexible cords shall be all thermoplastic,. Type STO.  EI0.2.5 For grounding requirements, see E15.2.  EI0.2.6  Incandescent lampholders shall be of the medium  base, screw shell type type and rated r ated 660 watts, 250 volts.  E10.2.7  Lampholders shall not incorporate a switch or  receptacle. 10.2.8 Stroboscopic effects from lights shall be avoided.  E 10.2.8 E11. Conductors E11.1 Specifications.  E11.1.1 Conductors (other than those specified in E11.2 and E 11.4) shall conform to one of the following: following: (I) Type MTW. (2) Types ypes THWN THWN or THHN THHN having having all characte characteris ristic ticss equal to Type MTW, MTW, except insulation thickness. (3) Multiconductor, all thermoplastic cable, Type Type STO. (4) Multic Multicondu onducto ctor, r, control control cable cable having having individ individual ual conductors of Type MTW, THWN, or THHN construction and a jacket similar to Type STO STO construction (5) Mineral-insulated metal-sheathed cable, Type MI.  E  11.1.2 Conductors shall be not smaller than: (1) Power circuits, No. 14 AWG. *(2) Control circuits in raceways and on the equipment,  No.14AWG. Exce Except ptio ion: n: No. No. 16 A WG may may be used used in jack jacket eted ed multiconductor cables. (3) Control Control circui circuits ts on panel panel and within within the operat operator' or'ss control station, No. 16 AWG AWG . *(4) *(4) Internal Internal wiring wiring of electr electronic onic,, static static and precis precision ion devices, No.22 A WG. Conductors shall be annealed stranded copper, copper,  E11.1.3 Conductors conforming conforming to the requirements requirements of ASTM StandardB8, StandardB8, Class C for non-flexing service and B174 Class K for  flexing service. Table 11-1 shows minimum stranding for  single conductors. Exception: Stranding for MTW conductors in sizes 1 A WG through 4/0 AWG inclusive may be 19 strand, and 37 strand for sizes 250 MCM through 500 MCM inclusive. Conductors in multiconduct multiconductor or cable cable shall meet  E11.1.4  E11.1.4 Conductors the requirements in E 11.1.3. Exception: Stranding shall be for constant flexing service as shown in Table 11-2. insulation n on the conducto conductorr shall shall have have a  E11.1.5 The insulatio readil readily y identi identifia fiable ble contin continuou uouss marking marking to indicat indicate: e:  National Electrical Code Type, voltage, size, temperature rating and manufacturer. In no case shall any part of the identification be obtained by the use of fibrous material.  E11.1.6  Metal-clad cable shall not be used.

*E11.2 Special Insulations. Where required by ambient conditions, conditions, other conductor conductor insulating material should be used. Wiring in and external to panels used on or adjacent to high heat generating generating equipm equipment, ent, such such as furnace furnaces, s, ovens, heat treating equipment, etc., shall have Underwriters' writers' approved approved Type AV AVA, SFF2 SFF2 or equal insulation insulation unless otherwise specified by the purchase r. E11.3 Conductor Ampacity allowab able le ampa ampaci city ty of cond conduc ucto tors rs in  E11.3.1 The allow racew raceway ayss conta containi ining ng more more than than six six condu conduct ctor orss with with ambient temperature not greater than 40 C (104 F), and conductors not close to heat dissipating components, shall not exce exceed ed the limits limits speci specifie fied d in Table able 11.3. 11.3. These These ampacit ampacitie iess are based based on the number number of conducto conductors rs in raceways according according to Table Table 13-1 For raceways containing less than six conductors, refer to NFPA 79, Table 200-A, for conductor ampacity. Table 11-1—Single Conductor Stranding Conductor Size, AWG or  MCM 22 20 18 16 14 12 10 8 6 4 3 2 1 0 2/0 3/0 4/0 250 300 350 400 500

Class C 19 19 20 19 19 19 19 19 19 19 19 19 37 37 37 37 37 61 61 61 61 61

Stranding Class K   † † † 26 41 65 104

†Use Class C Stranding

Table able 11-2— 1-2—M Multi ultico cond nduc ucto torr (Constant Flexing Service)

Cabl Cablee

Controller Size, AWB

No. of Strands

18

41

16

65

14

41

12

65

10

105

Stra Strand ndin ing g

Table 11-3—Conductor Ampacity Conductor Size, AWG or MCM 22 20 18 16 14 12 10 8 6 4 3

Rating in Amperes In Control In Conduit or Wireway Enclosure Power and Control Control Power   3 --5 --6 --8 8 -12 12 11 16 16 14 24 24 21 32 32 28 45 45 39 57 57 49 65 65 56

2 1 0 2/0 3/0 4/0 250 300 350 400 500 750 1000

77 90 102 119 135 160 177 196 213 229 262 327 373

77 90 102 119 135 160 --------

67 77 88 102 116 138 151 168 182 196 224 280 319

Motor circuit circuit conductors conductors shall have an ampacity ampacity  E11.3.2 Motor not less than 125 percent of the full-Load current rating of  the highest rated motor in the group, plus the sum of the full-load current ratings of all other connected motors and apparatus in the group which may be in operation at the same time. E11.4 E11.4 Electr Electronic onic,, Precis Precision ion,, Static Static and Similar Similar Control.  E11.4.1 Conductors used to connect electronic, precision, static or similar devices or panels shall conform to the following: (1) Conductor insulation shall be water and oil resistant, flame flame retardant material with an operating operating temperature rating rating of 90 C in dry loca locati tions ons.. Spec Specia iall insula insulati tions ons suitab suitable le for for higher higher tempera temperature turess shall shall be used used where where necessary. Conductor insulation shall be adequate for the voltage on that conductor. (2) Where the conductors are run with or adjacent to other  condu conducto ctors, rs, all conduc conductor torss shall shall be insulat insulated ed for for the maximum voltage voltage involved. involved. In no case shall insulation insulation rated less than 300 volts be used. Exception: Bare conductors (such as resistor and capacitor  leads, "jumpers" between adjacent terminals, etc.) may be used if the method of securing insures adequate electrical clearance.

E12. Wiring Methods and Practices E12.1 General Requirements. color-coded as follows: follows:  E12.1.1 Conductors shall be color-coded (1) Black--Line, load and control circuits at line voltage, AC or DC. (2) Red--AC control circuits. (3) Blue--DC control circuits. (4) Yellow ellow--I --Inter nterloc lock k control control circui circuits ts wired wired from from an external power source. (5) Green (with or without a yellow stripe)--Equipment grounding conductors. (6) White--Grounded circuit conductor. conductor. Exception No. 1: Internal wiring on individual devices  purchased completely wired. wired. Except Exception ion No.2: No.2: Where insulatio insulation n is used used that is not available in the colors required. Exception No.3: Where multiconductor cable is used. Exception No.4: Conductors used to connect electronic,  precision, static or similar devices or panels. Exception Exception No.5: Equipment for use outside the United United States where the above color code is not in agreement with established electrical codes. Exce Except ptio ion n No.6 No.6:: Addi Additi tiona onall colo colors rs may may be used used to facilitate identification between control panel and devices on the equipment; however, black shall be used for all wiring at line voltage.  E12.1.2 Conductors shall be identified at each termination   by by markin marking g with with a numbe numberr to corr corres espo pond nd with with the diagram(s).  E12.1.3  E12.1.3 Identification tags shall be made of oil- resistant material. If wrap-type adhesive strips are used, they shall  be a minimum of 1 3/8 inches long. Sleeve-type tags shall  be undersized so that they will not slip off the conductor if  the conductor is removed from its termination point.  E12.1.4 Terminals on terminal blocks shall be plainly and  permanently marked to correspond with the identification shown on the electrical diagram(s).

*E12.1.5 Terminals on terminal blocks shall be numbered in numerical ascending order, starting from top to bottom, or from left to right. Exception: Terminals for remote interlock wiring shall be grouped separately (See EI2.4.16)  E12.1.6  There shall be no exposed terminals external to control enclosures, compartments and junction boxes. Conductor torss and cable cabless shall shall be run witho without ut  E12.1.7  Conduc splices from terminal to terminal. *Exception: *Exception: Splices Splices may be made to leads attached attached to electrical devices, such as motors and solenoids, and shall  be insulated with oil-resistant electrical tape. Splices shall  be made according to E6.2.4. aped connec connectio tions ns shall be cover covered ed with with oiloil E12.1.8 Taped resistant adhesive tape which will not support combustion and conforms to Milit ary Specification Specification MIL-I-7798A.  E12.1.9 Terminal blocks shall be wired and mounted so that internal and external wiring does not cross over the termi terminal nals. s. Not Not more more than than two two cond conduc ucto tors rs shall shall be terminated at each terminal connection. **E12.1.10 Power wiring external to the cont rol enclosure shall be sized for the next larger horsepower motor, up to and including 25 horsepower. E12.2 Electrical Connections. *E12.2.1 Electrical connections to motors, solenoids and similar devices with integral leads, size No.4 AWG and smaller, shall be made with ring-type pressure connectors approved in accordance with Underwriters’ Laboratories Standard Standard UL 486. The connec connector torss shall shall be bolted bolted and taped. Soldered Soldered or insulation-pier insulation-piercing cing type type connectors connectors (lugs) are not acceptable. *E12.2.2 Ring-type pressure connectors shall be used to connect connect conductors conductors to devices devices with lug-type lug-type terminals which are not equipped with saddle straps or equivalent means of retaining conductor strands Except Exception ion No. No. 1: Sold Soldere ered d connec connectio tions ns may be used used within the protective shell of a plug or receptacle and for  internal internal connec connectio tions ns of a sub-as sub-assem sembly bly which which can be removed for bench service.

Table 12-1—Number 1 2-1—Number of Conductors in Panel Wireways† Wireway Size, Inches 1x1 1x2 1x 3 1 1/2 x 2 2x2 1 1/2 x 3 2x3 2 1/2 x 3 3x3

MTW 3/64 in. insulation; Maximum  No. 20 40 60 60 80 90 120 150 180

No. 14 AWG Conductors MTW 2/64 in. insulation; Maximum  No. 30 59 89 89 118 133 178 222 266

THWN, THHN Maximum O.D. 0.110 in; Maximum No. 53 105 158 158 210 236 316 394 473

No. 16 AWG Conductors MTW 2/64 in. THWN, THHN insulation; Maximum Maximum O.D. 0.110  No in; Maximum No. 38 64 76 127 113 191 113 191 152 254 170 286 226 381 283 477 340 572

Table 12-1 is based on 50 percent of area fill of wireway using stranded conductors. †When conductors other than No. 14 or 16 AWG are used, determine equivalent number of No. 14 conductors by multiplying number of conductors of sizes other  than No. 14 or 16 by “conductor “conductor equivalent” equivalent” from Tables Tables 13-2 and 13-3. Add the result result to the number number of No. 14 conductors conductors and use total for selecting selecting size of  wireway from Table 12-1.

E12.3 Panel Wiring Panell wirin iring g shal shalll be conta ontain ined ed in pane panell E12.3.1 Pane wireways, unless the total number of starters, relays and timers timers is less less than six. six. Where Where wirew wireway ayss are not used, used, conductors shall be bundled to keep them in place. number of conduc conductor torss in panel panel wirew wireway ayss E12.3.2 The number shall not exceed the values listed in Table Table 12-1.

panel wire wireway way material material shall shall not suppor supportt E12.3.3 The panel combustion. It shall be made of non-warping, insulating materia materiall rated rated for for the highest highest volta voltage ge applie applied d to any conduc conductor tor contain contained. ed. The wirew wireway ay shall shall not contain contain expos exposed ed metal metal parts, parts, except except for for the mounting mounting screw screwss where used.

*E12.3.4 Control panels shall be equipped with terminal  blocks for all external wiring requiring No. 4 AWG and smaller conductors. Conductors larger than No. 4 AWG may be terminated directly on t he device. Exception: This does not apply to supply line conductors. (See E3.7) E12.4 Equipment Wiring Conductors and their connections connections external to the E12.4.1 Conductors contr control ol panel panel encl enclos osure ure shall shall be tota totall lly y encl enclos osed ed in suitable metal raceways or enclosures as described in E13, except as otherwise permitted in this section. Multiconductor tor cable cable or liquid-tight liquid-tight flexible flexible *E12.4.2 Multiconduc metal conduit may be used for flexible flexible connection connectionss to  pendant push button stations. Multicondu onduct ctor or cable, cable, Type STO, STO, having having a *E12.4.3 Multic yellow color and secured at each end with an oil-tight connector, or liquid-tight flexible conduit, shall be used for for connec connectio tions' ns' to station stationary ary or infrequ infrequentl ently y moved moved devices, such as limit switches and solenoids, operated at control voltage. The exposed length of cable or flexible conduit between connectors shall not exceed three feet. Minimum wire size of cable shall be No.16 AWG. E12.4.4 Liquid-tight flexible metal conduit and fittings shall shall enclo enclose se conduc conductor torss to station stationary ary or infrequ infrequentl ently y move moved d devi device ces, s, such such as moto motors rs,, brak brakes es and othe other  r  apparatus, operated at line voltage. The length shall not exceed three feet. E12.4.5 Connections to continuously moving parts shall  be made with extra flexible conductors (Class K in Table 11-1) 1-1) enca encase sed d in liqu liquid id-ti -tight ght flex flexib ible le metal metal or nonnonmetallic metallic conduit not exceeding exceeding 1 1/2 inches trade size, size, or  with extra flexible multiconductor cable (See Table 11-2). Flexible cable and conduit shall have vertical connections and shall have sufficient slack to avoid sharp flexing and straining. Except Exception ion:: Horiz Horizontal ontal connec connectio tions ns may be used used if the flexible cable cable or conduit is adequately supported. installatio tion n of flexi flexibl blee condui conduitt and cable cable E12.4.6 The installa shall be such that liquids drain away from the fittings.  E12.4.7  Where liquid-tight flexible metal conduit is used for for flex flexing ing applica application tions, s, fittin fittings gs shall shall include include baske baskett weave or equivalent grips. E12.4.8 Where there is relative motion between flexible condu conduit it or cabl cablee and parts parts in proce process ss or equi equipm pment ent components components,, the construction construction and supporting supporting means shall  be such that there will be a clearance of at least one inch under all operating conditions. Barriers or guides shall be  provided where the clearance cannot be maintained. E12.4.9 Where practicable, conductors of any circuit shall  be contained in the same raceway ra ceway.. Conduc ucto tors rs conne connect cted ed in AC circu circuit itss and  E12.4.10 Cond conductors connected in DC circuits may occupy the same racew raceway ay,, regardle regardless ss of volta voltage, ge, provid provided ed they they are all insulated for the maximum voltage on any conductor in the raceway. Wheree equi equipm pmen entt must must be rem removed oved and and E12.4.11 Wher electrical circuits broken, plugs and receptacles may be used, provided they are polarized and of the grounding type. The male plug shall be connected to the load circuit. Power and control circuits shall not be carried in the same  plug.

*E12.4.12 Where equipment is constructed so that wiring must be disconnected for shipment, terminal blocks in an accessib accessible le enclosure enclosure shall be provided at the sectional sectional  points. Spare terminals shall be provided in each terminal enclosure, external to the control panel. The number shall  be ten percent of the total in use or a minimum of six, whichever is greater. E12.4.13 Sharp edges, burrs, rough surfaces or threads, with which the insulation of the conductors may come in contact, shall be removed from conduit fittings, raceways or any other parts. Where necessary, additional protection consisting consisting of a flame-retard flame-retardant, ant, oil-resistant oil-resistant,, insulating material shall be provided to protect conductor insulation. *E12.4.14 Wiring external to the control panel shall have a termination at the terminal blocks on the control panel. One wire shall shall be returned, returned, for for test test purpos purposes, es, from a connection between limit switches, push buttons or other  devic devices es connec connected ted in series series.. The commo common n side side of the contro controll circui circuitt shall shall be wired wired to a terminal terminal in master  master  terminal boxes. specified, a raceway raceway complete complete with *E12.4.1.5 Where specified, conduc conductor torss shall shall be furnish furnished ed betw between een a separa separatel telyymounted control enclosure and terminal boxes mounted on the equi equipm pment ent.. Exter Exterior ior wire wirewa ways ys (not (not condu conduit it)) compl complete ete with with conduct conductors ors shall shall be furnish furnished ed when when the number of conductors conductors required exceeds exceeds that for which three-i three-inch nch conduit conduit is suitab suitable. le. In either either case, case, terminal terminal  boxes shall be furnished on the equipment for terminating conductors from the control enclosure. Interlock ck contro controll circui circuitt wiring, wiring, which which is **E12.4.16 Interlo energized from a remote control power source, shall be segregated in terminal boxes and readily identified with yellow insulation so the conductors can be distinguished from from other other wiring wiring in the box. box. Boxe Boxess contain containing ing such such wiring shall be indicated on a plate affixed to the outside of the cover which reads: Separately Energized Interlock  Wiring. E13. Raceways, Fittings and Bends E13.1 General Requirements. Minimum Conduit Conduit Size. Size. No condu conduit, it, rigid rigid or  E13.1.1 Minimum flexible, smaller than 1/2 inch diameter trade size shall be used. Grounding. g. See See E15 for for accepta acceptable ble means means of  E13.1.2 Groundin grounding. E13.1.3 Type of Fittings. Fittings used with raceways and multiconductor cables shall be liquid-tight. E13.1.4 Accessibility of Covers. Covers shall be readily accessible. E13.1.5 Gaskets. Gaskets shall con form to E 17. Number er of Condu onduct ctor ors. s. The The num number of  E13.1.6 Numb conductors in conduit and wireways shall not exceed the quantity listed in Table Table 13-1. E13.2 Rigid Metal Conduit and Fittings. Corrosion Resistance. Resistance. Rigid Rigid conduit conduit and fit*E13.2.1 Corrosion tings tings shall shall be of a galv galvani anize zed d or shera sherardi rdize zed d stee steel, l, meeting the requirements of USAS Standard C80.1, Zinc Coated Rigid Steel Conduit, and C80.4, Fittings for Rigid Steel Conduit, or when requested, of a corrosion resistant material suitable for the conditions. Dissimilar metals in contact which would cause galvanic action shall not be

used. Conduit shall be protected against corrosion, inside and outside, except at threaded joints. ype of Fittings. Fittings. Unless Unless structural structural diffic difficultie ultiess E13.2.2 Type  prevent, fittings shall be threaded. They shall be made of  malle malleab able le or duct ductil ilee iron iron and have have impac impactt stren strength gth compar comparabl ablee to that of the condu conduit. it. Cover Coverss on condui conduitt fittings shall be gasketed. Table 13-1—Number 13-1—Number of Conductor Conductorss in Conduit Conduit and External Wireways† Conduit-C or  Wireway-W, Size, Inches 1/2-C 3/4-C 1-C 1 1/4-C 1 1/2-C 2-C 2 1/2-C 3-C 3 x 3-W 3 1/2-C 4-C 4 x 4-W 5-C 5 x 5-W 6-C 6 x 6-W

 No. 14 AWG Conductors THWN, THHN MTW 3/64 in. MTW 2/64 in. Maximum OD insulation, insulation, 0.110 in. Maximum no. Maximum no. Maximum no. 5 7 12 9 13 22 14 20 36 24 35 63 33 48 85 54 79 141 77 113 201 120 174 310 144 210 374 160 230 416 200 300 535 260 375 694 320 470 842 400 585 1050 465 680 1215 580 850 1500

E13.2.3 Running Threads. Running threads shall not be used on conduit. E13.2.4 Conduit Support. All conduit shall be securely held in place and supported at each end. Where threadless fittings must be used, due to difficulty in assembly, conduit shall be fastened to the equipment so that it cannot be accidentally pulled apart, E13.2.5 Size of Bends. Bends of rigid conduit shall be made so that the conduit will not be damaged and the internal diameter of the conduit will not be effectively reduced. The radius of the curve of the inner edge of any field bend shall not be less tha n shown in Table 13-4. Numberr of Bends, Bends, A run of conduit conduit shall shall not E13.2.6    Numbe contain contain more than the equivalent of four quarter-bends quarter-bends (360 degrees total). Locknuts, Bushings and Seals. E13.2.7 Use of Locknuts, Where condui conduitt terminat terminates es in a threadle threadless ss *E13.2.7.1 Where opening opening,, a locknut locknut shall be provided provided both inside inside and outs outsid idee the encl enclos osur ure, e, and the condu conduit it end end shall shall be equipped with an insulating bushing. A suitable oil-tight means (such as an oil-resistant synthetic rubber O-ring and a metal cup) shall be provided between the outside lock locknut nut and open opening ing.. When When the condu conduit it enters enters the opening through a conduit conduit connector connector,, the shoulder of the connector may serve as the outside locknut. The O-ring assembly assembly or an equivalent equivalent sealing device shall also be furni urnish shed ed when when a lock locknu nutt is used used as a jam jam nut nut on connectors fitted to threaded hubs. E13.2.7.2 When the conduit enters the opening through a condui conduitt connec connector tor equipp equipped ed with with a tapered tapered surfac surfacee or  similar sealing action, no locknuts or gaskets are required,  providing the resulting seal is liquid-tight. E13.3 E13.3 Liquid Liquid-tig -tight ht Flexibl Flexiblee Condu Conduit it and Fitting Fittingss. Flexible conduit shall be installed in a manner that liquids

will tend to run off the surface instead of draining toward the fittings. Metallic ic Conduit Conduit.. LiquidLiquid-tigh tightt flexi flexibl blee metal metal  E13.3.1 Metall conduit shall consist of an oil-resistant, liquid-tight jacket or lining in combination with flexible metal reinforcing tubing. E13.3.2 Non-Metallic Conduit. E13.3.2.1 Liquid-tight flexible non-metallic conduit shall consist of a water and oil-resistant and flame-retardant material. It shall be constructed of a seamless liner and cover, cover, bonded together with one or more layers of flexible, flexible,  braided, reinforcing cords.

1 1/2

Table 13-2—MTW Conductor Equivalents Conductor Size, AWG

Insulation thickness, 64th inches

16 14 14 12 12 10 10 8 8 6 4 3 2 1 0 00 000 0000

2 2 3 2 3 2 3 3 4 4 4 4 4 5 5 5 5 5

Maximum OD, Inches

0.130 0.147 0.178 0.166 0.197 0.190 0.221 0.252 0.283 0.321 0.370 0.402 0.432 0.513 0.546 0.593 0.645 0.702

Equivalent  No. 14 AWG 1/64 inch Insulation Conductors 0.53 0.68 1.0 0.87 1.2 1.15 1.5 2.0 2.5 3.3 4.3 5.1 5.9 8.3 9.4 11.0 13.0 16.0

For conductors 250 MCM and larger, use actual area of conductors and calculate conduit size on basis of 40 percent conduit area fill.

Table 13-3— 3-3—‘‘THW THWN Equivalents

and

THH THHN

Conductor Size, AWG

Maximu m OD, Inches

Equivalent No. 14 THWN, THHN Conductor 

16 14 12 10 8 6 4 3 2 1 0 00 000 0000

0.100 0.110 0.130 0.170 0.220 0.257 0.328 0.356 0.388 0.452 0.492 0.541 0.590 0.647

0.83 1.0 1.39 2.39 4.0 5.5 8.9 10.5 12.6 17.0 20.2 24.1 28.6 34.6

Conductor Equivalent  No. 14 AWG 1/64 inch Insulation MTW Conductors 0.31 0.38 0.53 0.91 1.52 2.1 3.4 4.0 4.8 6.5 7.7 9.2 10.9 13.2

For conductors 250 MCM and larger, use actual area of conductors and calculate conduit size on basis of 40 percent conduit area fill.

Table 13-4—Minimum Radii of Conduit Bends Conduit Size, Inches 1/2 3/4 1 1 1/4 1 1/2 2 2 1/2 3 3 1/2 4 5 6

Radius of Conduit Bends, Inches 4 5 6 8 10 12 15 18 21 24 30 36

Table able 13-5 13-5—Li —Liqu quidid-Ti Tigh ghtt Conduit Dimensions Trade Size, Inches 1/2 3/4 1 1 1/4

 Nominal Inside Diameter, Inches 0.622 0.824 1.049 1.380

Flexi Flexible ble Minimum Wall Thickness, Inches 0.140 0.140 0.175 0.185

NonNon-Met Metall allic ic

1.610

0.200

E13.3.2.2 The conduit shall be resistant to kinking and shall shall have have physic physical al characte characteris ristic ticss compar comparabl ablee to the  jacket of multiconductor cable. The cond condui uitt shal shalll be suit suitab able le for use use at E13.3.2.3 The temperatures of 80 C in air and 60 C in the presence of  water , oil or coolant. E13.3.2.4 The conduit shall have dimensions as near as  practicable to the limits given i n Table 13-5. E13.3.3 Standards for Fittings . Connectors for liquidtight tight flexi flexible ble metal and non-met non-metalli allicc condu conduit it shall shall be liquid-tight, made of metal, designed to electrical trade size sizess and meet meet the requi require remen ments ts of Unde Underw rwri rite ters' rs' labo laborat ratori ories es Stand Standard ard UL 514. 514. Fitti Fittings ngs shall shall have have suf suffici ficient ent threa thread d length length to acco accomm mmod odat atee a gaske gaskett assembly, assembly, a box wall thickness of 0.125 inc h and a locknut and bushing. E13.4 Compartments and Raceways . Descripti iption. on. Racew Raceway ays, s, juncti junction on boxes boxes and   E13.4. E13.4. I  Descr wiring should be external to the base or column of the equipment. However, compartments and raceways within the column or base may be used to enclose conductors,  provided they are isolated from coolants and oil reservoirs and are enclosed except as noted in E13.4.2. Conductors shall be protected from mechanical damage and abrasion. Gene Genera rall purp purpos osee flex flexib iblle cond condui uitt may may be used used as additional additional protection protection in compartments compartments and raceway racewayss if  fastened at each end. Raceways. Raceway Racewayss integral with  E13.4.2 Drainage of Raceways. equipment equipment bases or columns shall be arranged to drain to convenient points. Openings of 1/4 inch diameter shall be  provided at such points to permit drainage.  E13.4.3 Compartment Door Hinges. Compartment doors exceeding 150 square inches should be hinged. E13.5 Junction, Pull and Terminal Boxes. Boxes shall  be readily accessible. *E13.5.1 Construction. Junction, pull and terminal boxes shall shall not have knock knockout outss and shall shall be provided provided with gasketed covers. Boxes shall be oil-tight. Mounting means external to the box shall be provided. Covers larger than 150 square inches shall be hinged. Covers not hinged shall be captive to the box. Boxes 24 square inches and smaller shall be made of sheet steel, a minimum of 0.060 inch thick, and those larger  than 24 but less than 320 square inches, not less than 0.075 inch thick. Cast boxes shall be made of metal and shall conform to UL Standard 508. Cover fasteners shall  be external external to the enclosed area and captive captive to the box or  cover. Terminal enclosures 320 square inches and larger shall conform to Section E7. Vault-type hardware need not be furnished on the door unless the surface enclosed exceeds 1500 square inches.  E13.5.2 Motor Junction (Conduit) Boxes. Motor junction (conduit) boxes shall not be used for wiring to solenoid valves, limit switches and other control devices. Exception No. 1: Leads from separately mounted motor    bra brake kess may may be connec connecte ted d in the box if the brake brake is connected directly to the motor terminal leads and has no other connections.

Exception No.2: Connections for motor-mounted devices, such such as brak brakes es,, therm thermos ostat tats, s, plug pluggin ging g swit switche chess or  tachometer tachometer generators, may be connected in the motor   junction (conduit) box. E13.6 Wireways. Exterior wireways may be used when rig rigidl idly sup support porteed and and clea clearr of all all opera perati ting ng or  conta contamin minat ating ing port portio ions ns of the equi equipm pment ent and shall shall conform to the following: following: (1) Wireways Wireways shall be oil-tight . (2) Metal thickness shall be a minimum of 0.075 inch (No.14 USS gage). (3) Covers on wireways shall be hinged, shaped to overlap the sides sides and held held close closed d by captive captive screws screws or other  other  suitable fasteners exterior to the wireways. Gaskets for  cove covers rs and sect sectio ion n joint jointss shall shall conf confor orm m to E17. E17. For  sections mounted horizontally the covers shall be on top. (4) Wireway Wirewayss with knockouts knockouts are not acceptabl acceptable. e. Only such openings as are required for wiring the equipment shall be provided. (5) (5) Corne Corners rs,, bend bends, s, edge edges, s, etc., etc., shall shall have have all burrs burrs remove removed. d. Additi Additional onal protec protecti tion on shall shall be provid provided ed to  protect conductor insulation at all sharp bends and drop   points. points. Such protection protection may consist consist of fibre, plastic or  other material to cover the edge or corner with sufficient radius .to prevent damage to the insulation. (6) Conducto Conductorr fill fill shall shall not exceed exceed 40 percen percentt of the wireway cross-sectional cross-sectional area. E14. Motors Except pt as note noted d in this this stand standard ard,, E14.1 Standards Standards. Exce motors shall meet the requ irements of the following: (1) USA Standard C6.1, Terminal Markings for Electrical Apparatus. (2) USA Standard C50, Rotating Electrical Machinery. (3) NEMA Standard MG-l, Motors and Generators. E14.2 Type of Motor . *E14.2.1 AC motors shall be standard Design B, footmounted, mounted, single-end single-end shaft, anti-friction anti-friction bearings. bearings. Motors Motors up to and including 100 horsepower, 1800 rpm, are to be totally-e totally-enclo nclosed, sed, fan-coole fan-cooled, d, except except motors motors smaller smaller than frame size 184 need not be fan-cooled. Where polyphase  power is available, motors 1/4 horsepower and larger shall  be polyphase.  Note: The use of motors with short-time ratings and all other other motors motors not conf conformi orming ng to E 14.2.1 14.2.1 shall shall require require written approval.  E14.2.2 Integral horsepower AC motors, NEMA Frame 445 US or smaller, but not exceeding 100 horse-power, 1800 rpm, shall be dual voltage. Motor voltage ratings shall be as specified by purchaser. Exception: Multi-speed motors may be single voltage. E14.3 Mounting of Motors.  E14.3.1 Each motor shall be mounted where it is readily accessible for maintenance and not subject to damage. All motor-driven couplings, belts and chains shall be easily replaceable.  E14.3.2 The motor mounting arrangement shall be such that all motor hold-down bolts can be removed easily and replac replaced ed and juncti junction on (condu (conduit) it) boxes boxes shall shall be readily readily accessible.  E14.3.3 Motor compartments shall be clean and dry and adeq adequa uate tely ly vent vented ed dire direct ctly ly to the the exte exteri rior or of the the

equi equipm pmen ent. t. Unle Unlesss othe otherr compa ompart rtme ment ntss meet meet the the requirements of the motor compartment, there shall be no openings of any kind between the motor compartment and any other compartment of the equipment. Where a conduit or pipe is run into the motor compartment from another  comp compart artme ment nt not not meet meeting ing the moto motorr comp compart artme ment nt requirements, any clearance around the conduit or pipe shall be sealed. Direct-coupled, upled, foot-m foot-mounted ounted motors motors shall be  E14.3.4  Direct-co aligned properly. properly. Couplings shall be flexible type. type.  E14.3.5 Motors mounted within machine compartments or enclosures shall be provided with sufficient space for  ease of lubrication, servicing and replacement. Sufficient air circulation shall be provided so that the motor, when under under full-l full-load oad conditi conditions, ons, will will not excee exceed d its rated rated temperature rise. motor compar compartmen tmentt or mounting mounting space space **E14.3.6 The motor shall be of sufficient size to accommodate a NEMA frame size size motor motor,, compl complete ete with with juncti junction on box, box, two two NEMA NEMA horsep horsepow ower er sizes sizes larger larger,, at the same same speed, speed, than that recomm recommende ended d by the industri industrial al equipm equipment ent builder builder for  driving the equipment. Arrow A permanen permanentt metal metal arrow arrow to *E14.4 Direction Direction Arrow indicate the proper direction direction of rotation rotation of each motor  shall be provided. The arrow shall not be mounted on the motor. E14.5 Special Characteristics. E14.5.1 Special motors with static and dynamic balance and noise control shall be used only to eliminate machine trouble from these sources. In no case shall the degree of    balance be less than that specified in N EMA Standard MG-l, Motors and Generators. Speciall charact characteris eristic ticss of AC motor motorss shall shall be E14.5.2 Specia shown on a separate nameplate mounted adjacent to the conv convent entio ional nal moto motorr namep namepla late te.. The manuf manufac actur turer' er'ss catalo catalog g numbers numbers shall shall not be consi consider dered ed suff suffici icient ent to designate such ch aracteristics. Typical Typical examples are: (1) Special insulation. (2) Special shaft length. (3) Special torque. (4) Special balance. (5) Special lubrication. Integral-horsepowe ower  r  **E14.6 **E14.6 Motor Motor Junct Junction ion Boxes Boxes. Integral-horsep motor junction boxes shall not have knockouts A gasket shall be furnished on the cover of the motor junction box, and between the junction box and the motor frame. E15. Grounding E15.1 Control Circuits *E15.1.1 Ungrounded control circuits shall be equipped with ground detector lights. For typical connections, see Sample Elementary Diagram, Appendix B. Exception: Ground detector lamps are not required where a combination motor starter is the only control on the equipment. E15.1.2 When a grounded control circuit is specified, the side side of the the circ circui uitt conne onnect cted ed to the the coil coilss shal shalll be   perm permane anentl ntly y grou grounde nded. d. There There shall shall be no conta contact ctss   betw between een solen solenoid oidss and the grounde grounded d conduc conductor tor (See (See E5.3.1). Insulation on the grounded conductor shall be white white and shall shall be connected connected directly directly to the control control tran transf sfor orme merr with withou outt over overcu curr rren entt prot proteectio ction. n. The The

grounding conductor shall be green (with or without a yellow stripe) or bare. Table 15-1—Size 1 5-1—Size of Grounding Conductors Column “A” Amperes 20 30 40 60 100 200 400 600 800 1000 1200

Copper Wire Size, AWG 14 0r 16† 14 12 10 8 6 4 2 0 00 000

Table 16-1—High Potential Test Voltages Voltages Circui cuit Voltage age 115 230 380 460 550

Test est Voltage age 1230 1460 1760 1920 2100

 E15.1.3 Exposed control circuits operating at 25 volts or  less shall be grounded. (See E5.2.1, Exception No.2.) E15.2 Lighting Circuits. One conductor of the lighting circ circui uitt fed fed from from a sepa separa rate tely ly moun mounte ted d isol isolat atin ing g transformer shall be grounded only at the transformer . Exception: Where the lighting circuit is fed from the plant lighting circuit, the grounded conductor shall be identified  by a white or natural gray colored Insulation. E15.3 Stationary Equipment. All exposed, non-current carry carrying ing meta metall parts parts of equi equipm pment ent,, such such as contr control ol enclosures, raceways. control stations, separately mounted apparatus, and portable and pendant accessories, shall be grounded. grounded. For separately separately mounted electrical electrical apparatus. a   bond bonding ing condu conducto ctorr shall shall be included included in the wiring wiring for  for   bonding such apparatus to the equipment. E15.4 Methods of Grounding . Bonding by attaching the equipment to the machine with bolts or screws shall be considered a satisfactory ground where all paint and dirt are removed from joint surfaces. Moving machine parts, other than removable accessories or attachments, having metal-to-m metal-to-metal etal bearing surfaces surfaces shall be considered considered as adequately bonded. Sliding parts separated by oil or air  under pressure a re not considered bonded together. E15.5 Equipment G rounding rounding Conductors  E15.5.1 A copper or other corrosion-resistant conductor  shall be used for grounding and bonding purposes. Where a cond conduc ucto torr othe otherr than copp copper er is used used,, its its elec electr tric ical al resistance per lineal foot shall not exceed, and its tensile strength shall not be less than that of the allowable copper  conductor . Equipm pment ent grou groundi nding ng condu conduct ctors ors may may be  E15.5.2 Equi insulated or bare and shall be protected from damage by means equivalent to those provided for live conductors. If  an insulated equipment-grounding conductor is used, the insulation sh all be green (with or without a yellow yellow stripe).  E15.5.3 Raceways shall not be used in lieu of a grounding or bonding conductor. conductor.  E15.5.4  The size of the equipment grounding conductor  shall be as shown in Table 15-1 Column “A” indicates

maxi maximu mum m capa capaci city ty in ampe ampere ress or the the over overcu curr rren entt  protective device device in the ci rcuit ahead of the equipment . E16. Testing E16.1 Circuit Circuit Tests. When all wiring of the electrical system is complete, the builder shall test each circuit for  continuity, continuity, short circuits a nd fault grounds capable of withwithE16.2 Test Voltages. Wiring shall be capable standing the appropriate test voltage shown in Table 16-1. See NEMA Standard IC-1, Industrial Control. Control. Devices Devices which do not fall within the scope of Industrial Control Standard Standardss (e.g., (e.g., meters. meters. rectif rectifier iers. s. lamp lamp holder holders, s, snap switches switches,, electronic electronic equipment. equipment. ground detector detector lamps. etc.) and which require lower test voltages than specified above, above, should be disconnected disconnected before before high voltage voltage tests tests are made. E17. Gaskets Gasketss shall shall be of an oil-re oil-resis sistant tant E17.1 Materials. Gasket synthetic material. *E17.2 Doors. Door sealing gaskets shall be at least 1/8 inch inch thic thick k and and shal shalll be held held firml irmly y in plac placee by a continuous metal retainer in addition to the adhesive. E17.3 Covers Covers. Cover sealing gaskets shall be at least 1/ 16 inch thick and shall be held firmly and permanently in  place.

Appendix A-Typical Graphic Symbols for Electrical Diagrams SWITCHES CIRCUIT INTERRUPTER 

DISCONNECT

LIMIT

CIRCUIT BREAKER  NORMALLY OPEN

NORMALLY CLOSED

NEUTRAL POSITION ACTUATED

HELD ELD CLOSE LOSED D

LIMIT (CONTINUED) MAINTAINED POSITION

CLOSED

NORMALLY OPEN

OPEN

FO O T

FLOW (AIR,WATER,ETC. (AIR,WATER,ETC. ) NORMALLY OPEN

LIQUID LEVEL

PROXIMITY SWITCH

NORMALLY CLOSED

NORMALLY OPEN

NORMALLY CLOSED

NORMALLY OPEN

2-POSITION

1

2

TEMPERATURE

NORMALLY CLOSED

NORMALLY OPEN

F

NORMALLY CLOSED

NON-PLUG F

F

R 

R 

ROTARY SELECTOR  3-POSITION

1

 NP

PLUGGING

CABLE OPERATED (EMERG. SWITCH)

SELECTOR 

PLUGGING W/LOCK-OUT COIL

 NP

VACUUM & PRESSURE

NORMALLY CLOSED

TOGGLE

HELD ELD OPEN OPEN

2

NON-B RI RIDGING CO CONTACTS

†BRIDGING CO CONTACTS

OR

OR

3

 

1 LO †TOTAL CONTACTS TO SUIT NEEDS

THERMOCOUPLE

PUSHBUTTONS SINGLE CIRCUIT

-

1

-

2

-

+

NORMALLY OPEN

+ NORMALLY CLOSED

+

DOUBLE CIRCIRCUIT MUSHROOM HEAD

MAINTAINED CONTACT

CONNECTIONS, ETC CONDUCTORS NOT CONNECTED

CONNECTED

Appendix A-Typical Graphic Symbols for Electrical Diagrams (Continued) CONNECTIONS. (CONT’D) CONTACTS GROUND

CHASSIS OR  FRAME NOT NECESSARILY GROUNDED

PLUG AND REC’P.

RELAY, RELAY, ETC E TC

TIME DELAY AFTER COIL ENERGIZED NORMALLY OPEN

DE-ENERGIZED

 NORMALLY CLOSED

NORMALLY OPEN

NORMALLY OPEN

NORMALLY CLOSED

THERMAL OVERLOAD

NORMALLY CLOSED

COILS RELAYS, TIMERS, ETC.

SOLENOIDS, BRAKES, ETC. GENERAL

2-POSITION HYDRAULIC

3-POSITION PNEUMATIC

2-POSITION LUBRICATION

THERMAL OVERLOAD ELEMENT

CONTROL CIRCUIT TRANSFORMER 

H1 2-H

H3

H2

H4

2-L

3-P

X2

X1

COILS (CONTINUED) VARIABLE AUTO-TRANSFORMER 

LINEAR VARIABLE VARIABLE D IFFERENTIAL TRANSFORMER 

AUTO TRANSFORMER 

COILS (CONTINUED) SATURABLE TRANSFORMER 

REACTORS SATURABLE CORE

SATURABLE CORE

COILS (CONTINUED)

MOTORS

REACTORS (CONTINUED) ADJUSTABLE IRON CORE

3 PHASE MO MOTOR

DC MOTOR  

MAGNETIC AMPLIFIER  WINDING

AIR CORE

A

MOTORS (CONT’D) DC MOTOR FIELD

RESISTORS, CAPACITORS, ETC. RESISTOR 

HEATING ELEMENT

H

TAPPED RESISTOR 

RHEOSTAT

POTENTIOMETER  

Appendix A-Typical Graphic Symbols for Electrical Diagrams (Continued) RESISTORS, CAPACITORS, ETC. (CONTINUED )

METERS

CAPACITORS FIXED

ADJUSTABLE

POLARIZED ELECTROLYTIC

METER SHUNT

VOLT

AMP

VM

AM

FUSES (ALL TYPES)

-

+

RESISTORS, CAPACITORS, ETC (CONTINUED) PILOT LIGHTS

HORN, SIREN, ETC.

PUSH-TO-TEST

BUZZER

BELL

THERM THERMOC OC’PL ’PLE E

BATT BATTER ERY Y

+

R 

R 

-

LETTER DENOTES COLOR 

ELECTRONIC TUBES

SHIELDED CABLE COLD CATHODE SHOW ALL CONDUCTORS CONDUCTORS INS IDE VOLT. REGULATOR  SHIELD

DIODE

TRIODE

TETRODE

PENTODE

SHIELD

CONDUCTOR  ● DOT IN ANY TUBE ENVELOPE DENOTES GAS

ELECTRONIC TUBES (CONTINUED) THYRATRON

IGNITRON

PHOTOTUBE

NEON LIGHT AC

DC

AC W/INT. RES.

SEMICONDUCTORS RECTIFIER  DIODE

RECTIFIER  BRIDGE

ARC SUPPRESSORS AC

DC

AC AND DC

AC

-

+ AC

LIST VALUES OF RES. AND CAPT

ZENER  DIODE

Appendix A-Typical Graphic Symbols for Electrical Diagrams (Continued) SEMICONDUCTORS (CONTINUED) TUNNEL DIODE

VARICAP DIODE

TRANSISTOR  PNP

TRANSISTOR  NPN

TRANSISTOR  UNIJUNCTION

SILICON CONTROLLED RECTIFIER 

TRANSISTOR  SURFACE BARRIER 

SEMICONDUCTORS (CONTINUED) TRANSISTOR  TETRODE

TRINISTOR

TRIGISTOR

BINISTOR  

TRANSISTOR  FIELD EFFECT

VARISTOR 

S

SEMICONDUCTORS (CONTINUED) THERMISTOR

PHOTOSENSITIVE CELLS ASYMMETRICAL

SYMMETRICAL

T

MISCELLANEOUS TERMINAL BLOCK 

SYNCRHRO OR  RESOLVER 

TACHOMETER  GENERATOR 

CORE OF SQUARE LOOP MATERIAL

LOCATION OF RELAY CONTACTS

1 CR 

1

10

TG

1CR 

11

CLAMP (2–3–4)

2 1CR 

12

3 DIFFERENTIAL SYMMETRICAL NONSYNCHRO LINEAR  RESISTOR 

15

1CR  1

NUMBERS IN PARENTHESIS DESIGNATE THE LOCATION OF RELAY CONTACTS A LINE BENEATH A NUMBER SIGNIFIES A NORMALLY CLOSED CONTACT.

SEQUENCE CHARTS PROGRAM OR SEQUENCE TIMER TIMER  CONTACT

RESET POSITION

TIMING (MINUTES) 1

2

3

4

5

6

7

CAM SWITCH OPERATION TIME (MINUTES)

DEGREES 90

180

DEGREES OPERATION

OP EN ENS

1TR - 1

0

2

1CS

22º TO 180º

1TR - 2

3.75 1.9

7.2 8.5

2CS 3CS

0º TO 194º 225º TO 360º

SHADED PORTION INDICATES CONTACT CLOSED

9

SWITCH

CL OS OS ES ES

ITR - 3

8

270

SHADED PORTION INDICATES CONTACT CLOSED

*Appendix B—Sample Electrical Diagrams The drawings which follow are intended only to illustrate proper electrical drafting practices outlined in the standard. Diagram shown is for ungrounded control circuit. DISC 1M

1FU

1OL

1T1

1L1

L1 2FU 460V 3Ø 60

HYDRAULIC HYDRAULIC PUMP MOTOR  3 HP 1800 RPM FRAME 213

1T2

1L2

L2

1MTR  3FU

1T3

1L3

L3 15 AMP

2OL

2T1 SPINDLE MOTOR  2 HP 1800 RPM FRAME 184

2T2 2MTR  2T3 H3

H1

H2

H4 T

X1 10 AMP 6FU

10 AMP 4FU 1PB MASTER STOP 1

1OL 9

1

10

CR  M

3

AUTOMATIC

CRM

4PB

11 5

CRM

CRH

13

12

2LT

CRA

3PB RESET

5

14

6 3LT

CRH

7 CYCLE START

2CR 

5

16 7PB

15

6PB

1LS 17

1CR 

9

18

2LS

26

26

6LS

5LS

19

22

7CR 

20

6CR 

22

21

CR  A

6

R 

5

5PB MANUAL

11

8

4

1M

2

4

2

1M

7

10 AMP 7FU

R 

2OL

8

1

10 AMP 5FU 1LT

2PB START MOTORS

3

H2

115 V

“AUTOMATIC”

CR  H

MANUAL 6, 7, 15, 18, 23 “MANUAL”

A

5 23

1 CR 

6

21

21

ASTER RELAY 3,3 AUTOMATIC 5, 14, 16, 21

CLAMP PART CONTROL 9, 33, 33, 35, 35

1PS “LUBE FAULT”

R 

10 1FS 11 5

24

25

26

5CR 

28

29

2 CR 

12 2CR 

CRA HEAD FORWARD 8PB 37

15

CRA

7CR 

30

33

4CR 

3LS

34

5CR  35

36

40

39

4 CR 

HEAD RETURN 9PB

CRH

41

19

5CR  44 8

CRA 5

10PB UNCLAMP

22

47

4LS

5LT

5CR 

A

8CR 

48

7CR 

51

50

6 CR 

CRH

6CR 

“FULL DEPTH”

5

49

23

52

24

6

26

8

1 5

53 11PB EMERGENCY RETUREN

27 28

54

5 7LT

8 CR 

“HEAD RETRACTED” 6

A 9CR

55 EMERGENCY RESET

5

G 2LS

2PB

29 30

8

1LS

12PB

56

7CR

 

57

UNCLAMP CONTROL 8, 22, 34, 34, 36, 36

HEAD RETRACTED NDICATOR  8, 14, 17, 22, 28

7 CR  6LT

25

HEAD RETURN CONTROL 14, 38, 38

ULL DEPTH CONTROL 12, 14, 17, 20, 21

5 CR 

43

6LS

5LS

43

8CR 

8 46

45

6

HEAD RETRACTED 42

20

HEAD FORWARD CONTROL 37, 37

3 CR 

HEAD IS FORWARD 7CR 

9CR 

5

18

21

9CR  32

5CR  

16 17

8CR  31

CRH

38

ANTI-REPEAT CONTROL 8, 13

28

13

14

6

CLAMPS ARE IN NDICATION 14, 20, 21, 29 “CLAMPS ARE IN”

5 9 CR 

8CR  9CR 

8LT

58

6 R 

5

“EMERGENCY RETURN ACTIVE”

4

3 GROUND DETECTOR LIGHTS

9LT 31

59

2 32

CHANGES

10LT

1 1CR 

1CR  60

8FU†

60

2-H

SOL A

61

6 CR

62

9FU†

62

2-H

SOL B

63

6CR 

1CR 

64

10FU†

64

2-H

SOL C

65

1CR 

6 CR 

66

11FU†

66

2-H

SOL D

67

6CR 

3CR 

68

12FU†

68

2-H

SOL E

69

3CR 

4CR 

70

13FU†

70

2-H

SOL F

71

4CR 

33

LH CLAMP 3

4 LH UNCLAMP

34

RH CLAMP

35 36

RH UNCLAMP

37

HEAD FORWARD 3

4

38

HEAD RETURN

†WHERE SOLENOID FUSE IS PART OF TERMINAL STRIP ASSEMBLY, CONDUCTOR NUMBER DOES NOT CHANGE SEQUENCE OF OPERATION

A. PRESS “START MOTORS” PUSHBUTTON “2PB” MOTORS START “MOTORS RUNNING” LAMP “1LT” ARE ENGERGIZED. B. P RESS EITHER AUTOMATI AUTOMATIC “4P B” OR MANUAL “5PB” PUSHBUTTON, CORRESPONDING RELAY RELAY AND LAMP ARE ENERGIZED. NOTE: TO SWITCH FROM MANUAL TO AUTOMATIC. OPERATOR MUST PRESS “RESET” PUSHBUTTON “3PB” BEFORE PRESSING AUTOMATIC AUTOMATIC PUSHBUTTON “4PB” . C. AUTOMATIC CYCLE WITH MOTORS RUNNING AND “CRA” ENERGIZED. MACHINE IS SET FOR AUTOMATIC CYCLE HEAD MUST BE RETRACTED AND PART UNCLAMPED TO START CYCLE. 1. OPERATOR LOADS PART IN FIXTURE AND PRESSES BOTH “CYCLE START” PUSHBUTTONS “6PB” AND “7PB” ENERGIZING “1CR” (SOL A AND SOL C) TO CLAMP PART 2. CLAMPED PART TRIPS “1LS” AND “2LS”. ENERGIZING “8CR” RELAY “3CR” (SOL E) IS ENERGIZED MEMENTARILY. STARTING HEAD FORWARD IN RAPID ADVANCE. HEAD CAMS VALVE INTO FEED. 3. WHEN HEAD IS IN FORWARD POSITION, “3LS” IS TRIPPED, ENERGIZING RELAY “5CR”. 4. “5CR” CONTACT ENERGIZES RELAY “4CR” (SOL F) AND HEAD RETURNS. 5. WHEN HEAD IS FULY RETRACTED, “4LS” IS TRIPPED, DE-ENERGIZING “4CR” AND ENERGIZING “7CR” WHICH ENERGIZES “6CR” (SOL B AND SOL D) UNCLAMPING PART. 6. WHEN PART IS UNCLAMPED, “5LS” AND “6LS” ARE TRIPPED, DE-ENERGIZING DE-ENERGIZING RELAY “6CR”. 7. “2CR” RELAY PREVENTS MACHING RE-CYCLING IF BOTH “CYCLE START” PUSHBUTTONS ARE NOT RELEASED. D. MANUAL CYCLE: 1. WITH HEAD RETRACTED RETRACTED AND PART UNCLAMPED, PRESS “CYCLE START” START” PUSHBUTTONS “6PB” AND “7PB”, ENERGIZING ENERGIZING RELAY “1CR” (SOL A AND SOL C) TO CLAMP PART. 2. PRESS “HEAD FORWARD” PUSHBUTTON “8PB”, ENERGIZING “3CR” (SOL E) TO START HEAD FORWARD. 3. TO RETURN HEAD TO RETRACTED POSITION, POSITION, PRESS “HEAD RETURN” PUSHBUTTON “9PB”, ENERGIZING ENERGIZING “4CR” (SOL F). 4. WITH HEAD RETRACTED, RETRACTED, PRESS “UNCLAMP” PUSHBUTTON “10PB ”, ENERGIZING ENERGIZING “6CR” ( SOL B AND SOL D) TO UNCLAMP PART. E. EMERGENCY RETURN: IF “EMERGENCY RETURN” PUSHB UTTON “11PB” IS PRESSED ON EITHER EITHER “AUTOMATIC” OR  “MANUAL” CYC LE, THE HEAD WILL RETURN AND REMAIN IN THE RETRACTED POSITION, IN ORDER TO START CYCLE, THE “EMERGENCY RESET” RESET” PUSHBUTTON “12PB ” OR “START MOTORS” PUSHBUTTON “2PB” MUST BE PRESSED. F. LUBRICATION FAULT: FAULT: IF OVER-PRES SURE OR INADEQUATE SUPPLY IS INDICATED INDICATED BY THE OPERATION OF PRESS URE SWITHC “1PS” OR FLOAT SWITCH “1FS”, “LUBE FAULT” LAMP “4LT” IS LIGHTED AND RELAY “2CR” WILL REMAIN DE-ENER GIZED AT AT THE END OF THE MACHINE CYCLE. WHEN THE FAULT IS CORRECTED, “2CR” WILL BE ENERGIZED WHICH ALLOWS THE OPERATOR TO RESUME NORMAL OPERATION OF THE MACHINE.

LIMIT SWITCHES

1LS ( 8,2 6) TRIPPED WHEN PART IS CLAMPED CLAMPED 2LS ( 8,2 6) TRIPPED WHEN PART IS CLAMPED CLAMPED 3LS (14,19) TRIPPED WHEN HEAD IS FORWARD FORWARD 4LS (19,24) TRIPPED WHEN HEAD IS RETRACTED 5LS ( 8,2 1) TRIPPED WHEN PART IS UNCLAMPED UNCLAMPED 6LS ( 8,2 1) TRIPPED WHEN PART IS UNCLAMPED UNCLAMPED 1PS (10,12) OPERATED BY LUBE SYSTEM OVERPRESSURE 1FS (11,12) OPERTED BY ADEQUATE ADEQUATE LUBE SUPPLY FOR PANELS AND CONTROL STATION LAYOUT SEE FOR HYDRAULIC DIAGRAM SEE . LUBRICATION DIAGRAM SEE .

PART. NO.

. .

PURCHASE ORDER NO. P.O. 1234 . SERIAL NO. OF MACHING TYP 5678 . THESE DIAGRAMS DIAGRAMS USED F OR  MACHINE NO.

SHEET 2 .

AMT S YM YM

LAST WIRE NUMBER USED 71 . LAST RELAY NUMBER USED 9CR . SUPPLIER’S DWG. NO SUPPLIER’S NAME

FULL CATALOG DESCRIPTION OF ALL ITEMS

.

DES. BY J,I,C.

XY 100 DET. BY W.T.

CHECKED SAFETY BY R.S. OK P.N. DATE 8-2-66

DESCRIPTION SHEET SHEETS DWG.NO. Purchasers 2 dwg. no

SCALE

SAMPLE ELECTRICAL DIAGRAMS

PLANT DIVISION

XYZ MACHINE CO.

PANELS AND CONTROL STATION LAYOUT  .    M    R    E    T    9    B    T    1

1T1 1T2 1T3

   V    0    6    4

271 272

1” X 3”

   ”    3    X    ”    2    /    1    1

2T3

1M

CYCLE START

DISC

2OL

MOTORS RUNNING

9”

R 

AUTOMATIC

1LT

MANUAL

2LT

R 

A

3LT

 .    M    R    E    T    4    1

EMERG. RETURN ACTIVE 4LT

R 

START MOTORS

1FU 2FU 3FU

AUTOMATIC

MANUAL

EMERG. RESET

3

   U    U    F    F    4    5

4 5

12PB

5PB

RESET

12

1PB

3PB

11PB

14

T

CRM

CRA

CRH

CLAMPS ARE IN

FULL DEPTH

   U    U    F    F    6    7

A

   B    T    4

5LT

G

6LT

R 

27 37 41

9LT

CYCLE HEAD UNCLAMP FORWARD

HEAD RETURN

7PB

   ”    3    X    ”    2    /    1    1    B    T    2

A

LUBE FAULT

   V    5    1    1

43

CYCLE START

115V

7LT

HEAD RETRACTED

58

   B    T    5

13

460V

   V    5    1    1

55

   V    5    1    1

11

EMERG. RETURN

MASTER  STOP

1 1/2” X 3”

2

4PB

2PB

CYCLE START STATION

52

54

7 10

1

51

53

6

1OL

 .    M    R    E    T    6    3

2 5

6PB

9 1/2”

 .    M    R    E    T    2    1

1

10PB

1 1/2” X 3”

1CR 

2CR

3 CR

4CR

5CR

 

8PB

9PB

CYCLE START STATION

CONTROL STATION PANEL

CONTROL S TATION 1 1/2” X 3”

 .    M    R    E    T    9    2

47 51

6CR 

52 53

7CR 

9CR 

8CR 

6 1/2”

 .    M    R    E    T    9 1T1 1T2

7 1/8”

55

1T3 2T1

   V    0    6    4

 .    M    R    E    T    6    2

2T2

   V    5    1    1

   ”    3    X    ”    2    /    1    1

 .    M    R    E    T    1    1

26 1/2” 7 1/2”

   B    T    3

   B    T    7 1FT8

12 13 14

GROUND DETECTOR  LIGHTS

1 2 3 5

   V    5    1    1

   B    T    8

R 

R 

9LT

10LT

51 52 53 54 55

   V    5    1    1

4

1 1/2” X 3”

11

15

   B 2T3    T    6

1 1/2” X 3”

 .    M    R    E    T    6    2

   V    5    1    1

   B    T    9 AMT SYM PART. NO.

8 TERM

DES. BY J.I.C.

   U 66    U    U68    U    U70 60    U62    U 62    U64    U 64    F    F    F 68    F    F    F    1    2    3    8    9    0    1    1    1    1

XY 100 DET. BY W.T.

15 1/8” CHECKED SAFETY BY R.S. OK P.N.

60 62 64 66 60 70

5 1/2”

DESCRIPTION SHEET SHEETS DWG.NO. Purchasers 2 dwg. no

SAMPLE ELECTRICAL DIAGRAMS

115 V” MASTER TERMINAL BOX PANEL MAIN CONTROL PANEL

DATE 8-2-66

SCALE

PLANT DIVISION

XYZ MACHINE CO.

Appendix C-Glossary of Terms Terms  Actuator The cam, arm or similar mechanical device used to trip limit switches. condition ion of the atmosp atmosphere here   Ambient Conditions. The condit adjacent to the electrical apparatus. The specific reference may apply to temperature, contamin ation, humidity hu midity,, etc. Ambient ent temp tempera eratur turee is the   Ambient Ambient Temperature emperature. Ambi temperature of the surrounding cooling medium, such as gas or liquid, which comes into contact with the heated  parts of the apparatus. Current-c t-carr arry ying capa capaci city ty expre express ssed ed in  Ampacity Curren amperes. (NEC-NFPA No.70)  Anti-Plugging Protection . Anti-plugging protection is the effect of a control function or a device which operates to  prevent application of counter-torque by the motor until the motor speed has been reduced to an .acceptable value. (NEMA IC-1  Apparatus. Control apparatus is a set of control devices used to accomplish the intended control functions. (USAS C42.25) Auxiliary contacts of a switching switching  Auxiliary  Auxiliary Contacts Contacts. Auxiliary device are contacts in addition to the main-circuit contacts and function with the movement of the latter. (NEMA IC1)  Auxiliary Device. Any electrical device other than motors and motor starters necessary to fully operate the machine or equipment.   Block Diagram. A block diagram is a diagram showing the relatio relationshi nship p of separat separatee sub-un sub-units its (bloc (blocks) ks) in the control system.  Bonding Conductor . .A, bonding conductor is one which serves to connect exposed metal surfaces together. branch h circ circui uitt is that that porti portion on of a   Branch Circuit . A branc wiring wiring syste system m extendin extending g bey beyond the final final overc overcurre urrent nt device protecting the circuit. (A device not approved for    branch branch circui circuitt protec protecti tion, on, such such as a thermal thermal cutout cutout or  motor overload protective device, is not considered as the overcurrent overcurrent device device protecting protecting the circuit.) circuit.) (NEC-NFP (NEC-NFPA  No.70) Screw-type ype fastener fastener that is retained in Captive Captive Screw. Screw. Screw-t some some manner manner when when unscr unscrew ewed ed and canno cannott easi easily ly be separated from the part it secures. Chassis . Sheet metal box, frame, or simple plate on which electronic components and their associated circuitry can  be mounted.. Circuit Breaker . A device designed to open and close a circuit by non-automatic means, and to open the circuit automaticall automatically y on a predetermine predetermined d overload overload of current, without injury to itself when properly applied within its rating. (NEC-NFPA No.70) circui uitt inte interr rrup upte terr is a nonnonCircuit Circuit Interru Interrupter  pter  A circ automatic automatic manually operated operated device device designed to open, under under abnormal abnormal conditi conditions. ons. a currentcurrent-carr carryi ying ng circui circuitt without injury to itself  magnet etic ic star starte terr havi having ng a Combination Combination Starter  Starter . A magn manually manually operated operated discon disconnec necting ting means means built built into into the same enclosure with the magnetic contactor. Compartment  A space within the base, frame or column of the equipment. Component See "device."

Conduit. Conduit. Flexible, Flexible, Metal  A flexible metal conduit is a flexi flexible ble racew raceway ay of circul circular ar cross cross secti section on specia specially lly const construc ructe ted d for for the purp purpos osee of the pulli pulling ng in or the withdrawing of wires or cables after the conduit and its fittings are in place (USAS (USAS C42.95) Conduit. Flexible Non-metallic . A flexible non- metallic condui conduitt is a flexi flexible ble raceway raceway of circul circular ar cross cross secti section on specially constructed for the purpose of the pulling in or  the withdrawing of wires or cables after the conduit and its fittings are in place Conduit, Rigid Metal . A rigid metal conduit is a raceway specially constructed for the purpose of the pulling in or  the withdrawing of wires or cables after the conduit is in  place and made of metal pipes of standard weight and thicknes thicknesss permitt permitting ing the cutting cutting of standard standard threads threads.. (USAS C42.95). contac acto torr is a devi device ce for repe repeat ated edly ly Contactor. A cont establishing establishing and interrupting an electric electric power circuit. (USAS C42.25) Continuous rating is the rating which Continuous Rating  Continuous defin defines es the subst substantia antially lly constant constant load load which which can be carried for an indefinitely long time. (NEMA IC-1 ) Control . See "controller electric.” Control Circuit. The control circuit of a control apparatus or system is the circuit which carries the electric signals directing the performance of the controller, but does not carry the main power circuit. (NEC-NFPA No.70) Cont Control rol Circ Circui uitt Trans ransfo form rmer  er . A contr ontrol ol circ circui uitt transformer is a voltage transformer utilized to supply a volta voltage ge suitab suitable le for for the operat operation ion of contro controll devic devices. es. (USAS C42.25) Control Circuit Voltage The control circuit voltage is the voltage provided for the operation of shunt coil magnetic devices. Control Compartment . A control compartment is a space within the base, frame, or column of the machine used for  mounting the control panel. Control Panel . See "panel." Control Station . See "operator's control station." Controller Electric . An electric controller is a device, or  group of devices, which serves to govern, in some predetermined manner, the electric power delivered to the apparatus to which it is connected. (USAS C42.25) control devic devicee is an individ individual ual  Device(Component). A control device used to execute a control function. (USAS C42.25)  Disconnecting Means. A disconnecting means is a device whereby the current-carrying conductors of a circuit can  be disconnected from thei r source of supply.  Disconnec  Disconnectt Switch Switch (   Motor Motor Circuit Circuit Switch). Switch). A motor  circuit switch is a switch intended for use in a motor   branch circuit. It is rated in horsepower, and it is capable of interrupting the maximum operating overload current of a motor of the same rating at the rated voltage. (USAS C42.25) (Also see NEMA IC-I for definition of operating overload.)  Dynamic Braking  Dynamic braking of an electric drive is a syst system em of brakin braking g in whic which h the motor motor is used used as a generator, and the kinetic energy of the motor and driven machinery is employed as actuating means of exerting a retarding force. (USAS (USAS C42.25)

  Electrical Electrical Equipment  Equipment  . In this his stand tandar ard d the the term erm ”Ele ”Elect ctri rical cal Equip Equipme ment" nt" inclu include dess elec electr troo-mag magne neti tic, c, elec electr troni onicc and stat static ic appar apparatu atuss as well ell as the more more common electrical devices. organized zed arrangem arrangement ent of all   Electrical Electrical System. System. The organi electrical and electro-mechanical components and devices in away away that will properly properly control the particular particular machine tool or industrial equipment. Electro tro-m -mec echan hanic ical al is the term term  Electro-Mechanical . Elec applied to any device in which electrical energy is used to magnetically cause mechanical movement.  Electronic Control  The term applied to define electronic, stat static ic,, preci precisi sion on and asso associ ciat ated ed elec electr tric ical al contr control ol equipment.  Elementary (  Sc Schem hematic atic)) Diagra Diagram m. An elem element entary ary (schematic) wiring diagram is a diagram using symbols and a plan of connections to illustrate in simple form the scheme of control. of control. case, box box or struct structure ure surround surrounding ing the  Enclosure The case, electri trical cal equipme pment, nt, which protects it from contamination. The degree of tightness is usually specified (e.g., (e.g., NEMA Type Type 12). (See (See NEMA Standard Standard IC-1 for  various enclosure descriptions and USAS C42.95, Section 91, Qualifying Terms.) Terms.)   External Control Devices. All control devices mounted external to the control panel.  Eyelet . Eyelets are used on printed circuit boards to make reliable electrical connections from one side of the board to the other side. electrical system system so designed designed Fail-Safe Operation. An electrical that the failure of any component in the system will pre vent unsafe operation of the controlled equipment. Feeder . A feeder is the circuit conductors between the service service equipment, or the generator generator switchboa switchboard rd of an isolated plant, and the branch circuit overcurrent device. (NEC-NFPA No.70) “motor-field failure relay ." Field Loss Re/ay . See “motor-field Grounded d means means connec connected ted to earth earth or to Grounded . Grounde some conducting body which serves in place of the earth.. (NEC-NFPA No.70) grounde ded d circ circui uitt is a circu circuit it in Grounded Circuit . A groun which which one conducto conductorr or point point (usuall (usually y the neutral neutral or  neutral neutral point point of transform transformer er or generat generator or winding windings) s) is intentionally grounded (earthed), either solidly or through a groundin g device. (USAS (USAS C42.15) grounding ng conduc conductor tor is one Grounding Grounding Conductor . A groundi which, under normal conditions, carries no current, but serves serves to connec connectt expos exposed ed metal metal surfac surfaces es to an earth earth ground, to prevent hazards in case of breakdown between current current-car -carry rying ing parts parts and the expos exposed ed surfac surfaces. es. The conductor, if insulated, is colored green, with or without a yellow stripe. Covered, shielded, fenced, fenced, enclosed enclosed or otherotherGuarded  Covered, wise protected by means of suitable covers or casings,  barriers, rails or screens, mats or platforms to remove the likelihood of dangerous contact or approach by persons or  objects to a point of danger. (USAS C42.95)  Inching. See .”jogging”  Inrush Current . The inrush current of a solenoid or coil is the steady steady-st -state ate current current taken taken from from the line with the armature blocked in the rated maximum open position.

 Isolating Transformer  Transformer . See "insulating transformer ."  Insulating  ( Isolating  ) Transformer. An insulati insulating ng (or  isolating) isolating) transformer is a transformer transformer used to insulate one circuit from a nother. (USAS C42.15)   Interconnecting Wire The term .”interconnecting wire" refers refers to those those connec connectio tions ns betw between een sub-as sub-assem sembli blies, es,   panels, chassis and remotely mounted devices and does not necessarily apply to the internal connections of these units. . diagra ram m sho showing ing all all   Interconn Interconnection ection Diagram Diagram A diag terminal blocks in the complete system with each terminal identified. interloc ock k is a devi device ce actu actuat ated ed by the  Interlock . An interl operation of some other device with which it is directly associated, to govern succeeding operations of the same or  allied devices. NOTE: Interlocks may be either electrical or mechanical. (ASA C42.25)   Intermittent Duty. Intermittent duty is a requirement of  service that demands operation for alternate intervals of  (l) load and no-load; or (2) load and rest; or (3) load, noload load and rest; rest; such such alternat alternatee interva intervals ls being being defini definitel tely y specified. (NEMA IC-1)  Interrupting Capacit. Interrupting capacity is the highest current at rated voltage that the device can interrupt. Jogging g is the quickl quickly y repeat repeated ed  Jogging  (  Inching  ). Joggin closure of the circuit to start a motor from rest for the  purpose of accomplishing small movements of the driven machine. (ASA C42.25) C42.25)  Joint . A joint joint is a conne connect ctio ion n betw betwee een n two two or more more conductors. (ASA C42.95)  Large Enclosures See E7 .2 of these JIC Standards. latching g relay relay is one that that can be   Latching Latching Relay. A latchin mechanic mechanicall ally y latche latched d in a given given posit position ion manually manually,, or  when operated by one element, and released manually or   by the operation of a second element. (ASA C42.20) Legend plates plates identify identify the function function of    Legend Legend Plates. Legend operator controls, indicating lights, etc.  Limit Switch . A limit switch is a switch which is operated   by by some part or motion motion of a powe power-d r-driv riven en machine machine or  equipment equipment to alter the electric electric circuit associated associated with the machine or equipment. (ASA C42.25)  Locked-Rotor  Locked-Rotor Current  Current . The lock lockeded-rot rotor or current current of a motor is the steady-s steady-state tate current taken from the line with the roto rotorr lock locked ed and with with rated rated volt voltag agee (and (and rated rated freque frequency ncy in the case case of alternat alternatinging-curr current ent motors) motors) applied to the motor. motor. (ASA C42.10)   Logic Control Panel Layout. Layout. The physical position or  arrangement of the devices on a chassis or panel.   Logic Diagram. A logic diagram is a diagram showing the relationship of standard logic elements in a control system. No internal detail of the logic elements need be shown.   Magnetic Device A magnetic device is a device actuated  by electro-magnetic electro-magnetic mean s.  Magnetic Starter . A magnetic starter is a starter actuated  by electro-magnetic electro-magnetic mean s. . The The main main encl enclos osur uree on the the   Maste Masterr Termin erminal al Box  equipment containing terminal blocks for the purpose of  termi terminat nating ing cond conduc ucto tors rs from from the contr control ol encl enclos osur ure. e. (Norm (Normall ally y asso associ ciat ated ed with with equi equipm pment ent requir requiring ing a separately mounted control enclosure.)

 Motor-Circuit Switch . See “disconnect switch."  Motor Junction (Conduit) Box . An enclosure on a motor  for the purpose of terminating a conduit run and joining motor to power conductors.  Motor-Field Failure Relay (Field Loss Relay). A motorfield failure relay is a relay which functions to disconnect the motor armature from the line in the event of loss of  field excitation. (NEMA IC-1) Nominal nal volta voltage ge is the utiliza utilizatio tion n   Nominal Voltage.   Nomi voltage. See the appropriate NEMA Standard for device voltage ratings.   Norm Normal ally ly Open Open and Norm Normall ally y Clos Closed ed. The The term termss ”normally open" and “normally closed," when applied to a magne magneti tical cally ly oper operat ated ed swit switchi ching ng devi device ce,, such such as a contactor or relay, or to the contacts thereof, signify the  position taken when the operating magnet is de-energized. These terms apply only to non-latching types of devices. (NEMA IC-1) Operating Floor  A floor or platform used by the operator  under normal operating conditions. Operating ing overl overload oad is the over over-Operating Operating Overload  Overload  Operat current current to which which elect electric ric apparatu apparatuss is subj subject ected ed in the cours coursee of norma normall oper operati ating ng cond condit itio ions ns that that it may may encounter. (USAS C42.25) . (Note 1: The maximum operating overload is considered to be six times normal full-load current for alternatingcurrent current industri industrial al motors motors and contro controll apparatu apparatus; s; four  four  time timess normal normal full full-l -loa oad d curre current nt for for direc directt- curr current ent industrial motors and control apparatus used for reducedvoltage starting: and ten times normal full-load current for direct-current industrial motors and control used for  full-voltage starting.) (Note (Note 2: It should be understood understood that these overloads overloads are current currentss that may persist persist for a very very short short time time only only, usually a matter of seconds.) Operator’s Control Station (Pushbutton Station) . A push  button station is a unit assembly of one or more externally operable pushbutton switches, sometimes including other   pilot devices such as indicating lights or selector switches in a suitable suit able enclosure. (USAS (USAS C42.25) Outline Drawing. Drawing showing approximate overall shape with no detail. Overcurren urrentt in an elec electric tric circuit circuit is that Overcurrent. Overc curre current nt whic which h will will caus causee an exce excess ssiv ivee or dange dangero rous us temperature in the conductor or conductor insulation. devicee operat operative ive on Overcurre Overcurrent nt Protective Protective Device A devic excessive current and maintains the interruption of power  in the circuit. Overla lapp ppin ing g cont contac acts ts are are Overlap Overlappin ping g Contact Contactss Over comb combinat ination ionss of two two sets sets of contac contacts, ts, actuat actuated ed by a common means, each set closing in one of two positions, and so arranged that the contacts of one set open after the contacts of the other set have been closed. (NEMA IC-1). device ce that that prov provid ides es over overlo load ad Overloa Overload d Relay Relay A devi  protection for electrical equipment.  Pane. A subpla subplate te upon upon which which the control control devic devices es are mounted inside the control compartment or enclosure.  Panel Layout. The physical position or arrangement of  the components on a panel or chassis. pendant nt stat statio ion n is a pushb pushbut utto ton n   Pendant Pendant (Station) (Station) A penda station suspended from overhead and connected by means

of flexible cord or conduit, but supported by a separate cable  Plugging. Plugging is a control function which provides   braking by reversing the motor line voltage polarity or    phase sequence sequence so that the: motor develop developss a countercountertorque while exerts a retard ing force. (NEMA IC-1)   Plug-in Device Component or group of components and their circuitry while can be easily installed or re moved from the equipment. Electrical connections are made by mating contacts.  Polarized Plug  A plug so arranged that it may be inserted in its receptacle only in a predetermined position.  Potting . Potting is a method or securing a component or  group of components by encapsulation.  Precision Device. A precision device is a device that will operat operatee within within prescri prescribed bed limits limits and will will consis consisten tently tly repeat operations within those limits. . A conduc conductor tor or terminal terminal applied applied   Pressure Connector  with pressure so as to make the connection mechanically and electrically secure. -Proof (used as a suffix). Apparatus is designated as spla splashp shpro roof of,, dust dustpro proof of,, etc. etc.,, when when so cons constru truct cted ed,,   protected protected or treated that its successful successful operation operation is not interfered with when subjected to the specified material or  condition.  Pushbutton Station. See "Operator’s control station."  Raceway. Any channel for holding wires, cables or bus  bars, which is designed expressly for, and used solely for, this purpose. (NEC-NFPA No.70)  Readily Accessible. Capable of being reached quickly for  operation, renewal, or inspection without requiring those to whom ready access is requisite to climb over or remove obsta obstacle cless or to resort resort to portab portable le ladders ladders,, chairs, chairs, etc. etc. (NEC-NFPA No.70)  Relay. A relay is a device which is operative by a variation in the conditi conditions ons of one electri electric: c: circui circuitt to effe effect ct the operation or other or  other devices in the same or another electric circuit.(NEMA IC-1)  Schematic Diagram . See “elementary diagram."  Semiconductor. A device which can function either as a conductor or a non-conductor, depending on the polarity of the applied applied voltage voltage such as a rectif rectifier ier or transist transistor  or  whic which h has a varia variabl blee condu conduct ctanc ancee depe dependi nding ng on the control signal applied.   Sequence of Operation A written detailed description of  the order in which electrical devices and other parts of the equipment should function.  ,  , Shield Shielded ed cable cable is single single or multiple multiple   Shielded Shielded Cable conductor cable surrounded by a separate conductor (the "shield "shield") ") intended intended to minimiz minimizee the effe effects cts of adjac adjacent ent electrical circuit"  Short-Time  Short-Time Rating  The short-time rating is the rating that defines the load which can he carried for a short and definitely specified time; the machine. apparatus or device  being at approximately room temperature at the time the load is applied (NEMA IC-1)  Small Enclosure See E7.2 of these: JIC Standards solenoid id magnet magnet (solen (solenoid) oid) is an elect electroro Solenoid  A soleno magn magnet et havi having ng an ener energi gize zed d coil oil appr approx oxim imat atel ely y cylin cylindri drical cal in form form and an armature armature whose whose motion motion is

reciprocating within and along the axis of the coil, (USAS C42.25)  Starter. A starter is an electric controller for accelerating a motor motor from from rest rest to normal speed, speed, (NOTE' (NOTE' A devic devicee desi designe gned d for for start starting ing a moto motorr in eithe eitherr direc directi tion on of  rotation rotation includes includes the additional additional function function of reversing reversing and should be designated a controller,) (NEMA IC-1) IC-1) associated with electronic electronic and other    Static Static Device. As associated control or information handling circuits, the term “static” refers to devices with switching functions that have no moving parts. multi-posi ositio tion n relay relay in   Stepping Stepping Relay (Switches) (Switches) A multi-p which moving wiper contacts mate with successive sets of  fixed contacts in a series of steps, moving from one step to the next in succe successi ssive ve opera operation tionss of the relay relay,, (USA (USAS S C83.16) A subsub-as asse semb mbly ly is an asse assemb mbly ly of   Sub-Assembly. electrical or electronic components mounted on a panel or  chassis which forms a functional u nit by itself,  Subplate A rigid metal panel on which control devices can be mounted and wired,  Swingout Panel  A panel which is hinge-mounted in such a mann manner er that that the the back back of the the pane panell may may be made made accessible accessible from the f ront of the enclosure. sign,, mark mark or draw drawin ing g agre agreed ed upon upon to  Symbol. A sign represent an electrical device or component part thereof. controll devic devicee respon responsiv sivee to Temperature Control. A contro temperature, Terminal. A point of connection in an electrical ci rcuit. Terminal Block. A terminal block is an insulating base or  slab equipped with one or more terminal connectors for  the purpose purpose of making making electr electrica icall connec connectio tions ns thereto thereto,, (NEMA IC-1). distributing point in circuit circuit wiring, other  Tie Point. A distributing than a terminal connection, where junctions of leads are made. Apparatus us is design designate ated d as -Tigh -Tightt (used (used as a suff suffix). ix). Apparat watertight, dust-tight, etc., when so constructed that the enclosing case will exclude the specified material, ( USAS C42.95) Undervoltage ge or low-vo low-voltage ltage Undervoltage Undervoltage Protection Protection Undervolta   prote protecti ction on is the effe effect ct of a devic device, e, operati operative ve on the reduction or failure of voltage" to cause and maintain the interruption of power power to the mai n circuit, (USAS C42.25) Vault-Type Hardware See E7.6 of these JIC Standard. ire-wrapp apping ing is a techniq technique ue used used to Wire-Wrapping. Wire-wr terminate conductors. Wireway. Wireways are sheet metal troughs with hinged covers covers for housing and protecting protecting electrical electrical conductors conductors and cable and in which conductor are laid in place after  the wireway has been installed as a complete system. Wobble Stick. A wobble stick is a rod extending from a   pendant station to operate the ”Stop” contacts and will function when pushed in any direction.

Appendix D-Device Designations The device designations given below are intended for use on diagram diagramss in conne connecti ction on with with the corres correspon ponding ding graphic graphical al symbols to indicate the function of the particular device. These device designations are based on the assignment of a standard letter or letters to the fundamental function that is performed by a component or device. Suitable prefix numbers ( I, 2, 3, 4, etc.) and suffix letters (A, B, C, D, etc.) may be added to the basic designation to differentiate between devices performing similar  functions. The assignmen assignmentt of a designat designation ion to a device device on a specif specific ic equipment Is governed by the function of that device on that  particular equipment and not by the type or nature of the device or its possible use for other functions in other equipment. The same type of device may perform different functions on different equipment or even on the same equipment and, consequently, may be identified by different designations.

Designation

Device

A ABE ABU AH AM AT B CAP CB CH CI CON COS CR CRA CRE CRH CRL CRM CRU CS CT CTR DAS DB DISC DT DVC DZ FA FB FD FF FL FLD FLS FS FTB FTS FU FW GRD HTR IOL LO LS LT LVT M MAX MB MC MCS MF

Accelerating Contactor or Relay Alarm or Annunciator Bell Alarm or Annunciator Buzzer  Alarm or Annunciator Horn Ammeter  Autotransformer  Brake Relay Capacitor  Circuit Breaker  Chassis or Frame (not necessarily grounded) Circuit Interrupter  Contactor  Cable Operated (Emergency) Switch Control Relay Control Relay, Automatic Control Relay, Electronically-Energized Electronically-Energized Control Relay, Manual Control Relay, Latch Control Relay, Master  Control Relay, Unlatch Cam Switch Current Transformer  Counter D Diode Diode Arc Suppressor  Dynamic Braking Contactor or Relay Disconnect Switch Tunnel Diode Varicap arica p Diode Zener Diode F Forward Field Accelerating Contactor or Relay Fuse Block  Field Decelerating Contactor or Relay Full Field Contactor or Relay Field Loss Contactor or Relay Field Flow Switch Float Switch Fusible Terminal Block  Foot Switch Fuse Field Weakening Ground Heating Element INST Instrument Instantaneous Overload Lock-Out Coil (located in plugging switch) Limit Switch Pilot Light Linear Variable Differential Transformer  Motor Starter  Magnetic Amplifier Winding Magnetic Brake Magnetic Clutch Motor Circuit Switch Motor Starter -Forward

MR MSH MTR   NLT OL PB PC PL PLS POT PRS PS PSC Q QBN QFE QSB QT QTG QTM QTN QU QVR R REC RECP RES RH RSS S SCR SOC SOL SS ST SX SYN T TACH TAS TB T/C TCS TGS TR TRE TVM V VAT VM VS WLT WM X

Motor Starter -Reverse Meter Shunt Motor  Neon Light Overload Relay Pushbutton Printed Circuit Plug Plugging Switch Potentiometer  Proximity Switch Pressure Switch Photosensitive Photosensitive Cell Transistor  Binistor Transistor  Field- Effect Transistor. Surface-Barrier Transistor. Tetrode Trigistor  Thermistor  Trinistor  Transistor, Unijunction Varistor  Reverse Rectifier  Receptacle Resistor  Rheostat Rotary Selector Switch Switch Silicon Controlled Rectifier  Socket Solenoid Selector Switch Saturable Transformer  Saturable Core & Reactor  Synchro or Resolver  Transformer  Tachometer Generator  Temperature-Actuated Switch Terminal Block  Thermocouple Thermocouple Switch Toggle Switch Time Delay Relay Timer Relay. Electronically-Energized Tachometer Indicator  Electronic Tube Variable aria ble Autotra nsformer  Voltmeter  Vacuum acuu m Switch Work Light Wattmeter  Reactor  

Appendix E-References to Other Codes and Standards

Society for Testing Testing Materials (ASTM) 1. American Society 260 South Broad Street, Philadelphia, Pennsylvania 19107 Wire and Cable  A. D2219, D2220, Insulat ion for Wire  B. B8, B 174, Conductors 2. United States of America Standards Institute (USASI) 10 East 40th Street, New York, New York 10016 Formerly American American Standards Association (ASA) Symbols for Electrical and Electronics Diagrams  A. Y32.2, Graphic Symbols  B. C19.1, Industrial Control Apparatus C . C80.1, Rigid Steel Conduit  D. C6.1, Terminal Marking for Electrical Apparatus  E . C50, Rotating Electrical Machinery 3. British Standards Institution (BSI) British Standards House, 2 Park Street, London, W1  A. BS2771, Electrical Equipment of Machine Tools 4. State of California Printing Division, Documents Section, Sacramento, California 95814  A. California State Electrical Safety Orders 5. Canadian Standard~ Association (CSA)  National Research Building, Ottawa 2, Ontario  A. Canadian Electrical Code 6. Electronic Industries Association (EIA) 2001 Eye Street, NW, NW, Washington, D.C. 20006 Tool Control  A. RS-281, Construction Standards-Numerical Machi ne Tool Ma nufacturers Association Association (NEMA) 7. National Electrical Manufacturers 155 East 44th Street, New York, New York, 10017  A. IC-1, Industrial Control  B. KS-I. Enclosed Switches C. AB-1, Molded Case Circuit Breakers  D. FU-1, Low-Voltage Cartridge Fuses  E. ST-1, Specialty Transformers F . MG-1, Motors and Generators

(NFPA) 8. National Fire Protection Association (NFPA) 60 Batterymarch Street, Boston, Massachusetts 02110  A. .NFPA No.70, National Electrical Code (NEC)  NFPA No.79, Electrical Standard for Metal-Working Metal-Working Machine Tools  B. NFPA 9. Superintendent of Documents Government Printin g Office, Washington, Washington, D.C. 20401 Adhesive, Plastic  A. MIL-I-7798A, Insulation Tape, Electrical, Pressure-Sensitive Adhesive, 10. Underwriters' Laboratories. Inc. (UL) 207 East Ohio Street, Chicago, Illinois 60611  A. UL 508, Industrial Control Equipment  B. UL 496, Edison-Base Lampholders Tool Wires and Cables C. UL 758, Provisional Requirements for Machin e- Tool  D. UL 83. Thermoplastic-lnsulated Wires  E. UL 62, Flexible Cord and Fixture Wire F. UL 486, Wire Connectors and Soldering Lugs G . UL 514, Outlet Boxes and Fittings

Appendix F-Sample Electrical Equipment Data Form  Note: This is a sample form. Each company may develop appropriate forms as required.

ABC COMPANY DATE DESCRIPTION OF EQUIPMENT REF. PURCHASE INQUIRY NO. REF. PURCHASE ORDER NO. FOR USE IN DIVISION PLANT FOR TECHNICAL INFORMATION CONTACT: NAME PHONE EXT. CITY STATE INSTRUCTIONS TO BUILDER  1. Electrical equipment and wiring wiring shall conform with: with: JIC Electrical Standard for Mass Production Equipment Other Standa rd and/or Code (Specify (Specify): ): Phase 2. Equipment Power Supply: Voltage 230/460 3. Motor voltage rating shall be: 1. Dual 220/440 2. Oth er (Specify): (Specify): 4. Approved Approved Materials: See separate mater ial list attach ed hereto. (Purchaser may attach an approved list of items.) 5. Type of Disconnecting Means Circuit Breaker with interrupting rating of  Fused Disconnect Switch As furnished by supplier  Other (Specify) 6. Control Circuit Ungrounded 7. Machine Machin e Work Work Lights Power Source:

C cles

am eres

Grounded Required

 Not Required

From Isolating Transformer  From Machine Control Circuit From Plant Lighting Circuit

8. Raceway and Wiring Raceway Raceway and wiring between separately mounted control enclosure and equipment sh all be: Furnished Not Furnished 9. Diagrams and Data: PRELIMINARY Reproducible

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Elementary Schematic Diagram Electrical Stock List Sequence of Operations Electrical Layout Panel & Control Station Layout Foundation Drawing 10. Purchaser ’s Assigned Drawing Number  11. Special Operating Requirements a. Reduced Voltage Staring: Method  b. Ambient Temperatures Other Than Normal c. High Altitude Operation (Specify Altitude) d. Tropical Environment (Specify Type) 12. Other Requirements (Explain)

FINAL Reproducible

Horsepower  

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