Symbols for Electrical Construction Drawings...
A M E R I C A N
N A T I O N A L
S T A N D A R D
NECA 100-2006
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Symbols for Electrical Construction Drawings
Published by
National Electrical Contractors Association
NECA 100-2006
Symbols for Electrical Construction Drawings An American National Standard
®
Published by
National Electrical Contractors Association
NOTICE OF COPYRIGHT This document is copyrighted by NECA Reproduction of these documents either in hard copy or soft (including posting on the web) is prohibited without copyright permission. For copyright permission to reproduce portions of this document, please contact NECA Standards & Safety at (301) 657-3110 ext. 546, or send a fax to (301) 215-4500. OR National Electrical Contractors Association 3 Bethesda Metro Center, Suite 1100 Bethesda, Maryland 20814 (301) 657-3110 Organizations may obtain permission to reproduce a limited number of copies by entering into a license agreement. For information, contact: IHS 15 Iverness Way East Englewood, CO 80112-5704 or call 1-800-854-7179 (USA and Canada) (303) 397-7956 (International)
Table of Contents
Foreword . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .iii 1. 1.1 1.2 1.3
Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 Symbols Included . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 Symbols Not Included . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 Regulatory and Other Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
2. 2.1 2.2 2.3
Purpose of Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 Organization of this Standard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 Alternate Safety Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 Referrences . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
3. 3.1 3.2 3.3 3.4
Drafting Practices for Electrical Construction Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 Symbol Design and Presentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 General Drafting Practices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 CADD Practices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 Electrical Construction Drawing Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Contents for Symbol Groups . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 Annex A: Alternate Fire Safety Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45 Annex B: Typical Risers, One-Line Diagrams, and Schedules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48 Annex C: Reference Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
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(This foreword is not a part of the standard)
Foreword
National Electrical Installation Standards™ (NEIS®) are designed to improve communication among specifiers, purchasers, and suppliers of electrical construction services. They define a minimum baseline of quality and workmanship for installing electrical products and systems. NEIS are intended to be referenced in contract documents for electrical construction projects. Use of NEIS is voluntary, and the National Electrical Contractors Association assumes no obligation or liability to users of this publication. Existence of a standard shall not preclude any member or nonmember of either organization from specifying or using alternate construction methods permitted by applicable regulations. This publication is intended to comply with the edition of the National Electrical Code (NEC) in effect at the time of publication. Because they are quality standards, NEIS may in some cases go beyond the minimum safety requirements of the NEC. It is the responsibility of users of this publication to comply with state and local electrical codes when installing electrical products and systems.
Suggestions for revisions and improvements to this standard are welcome. They should be addressed to: NECA Codes and Standards 3 Bethesda Metro Center, Suite 1100 Bethesda, MD 20814 (301) 657-3110 telephone (301) 215-4500 fax
[email protected] www.neca-neis.org To purchase NEIS contact the NECA Order Desk at (301) 215-4504 tel, (301) 215-4500 fax, or
[email protected]. NEIS can also be purchased in .pdf download format at www.neca-neis.org/ standards Copyright ©2006, National Electrical Contractors Association. All rights reserved. Unauthorized reproduction prohibited. National Electrical Installation Standards, NEIS, and the NEIS logo are trademarks of the National Electrical Contractors Association. National Electrical Code and NEC are registered trademarks of the National Fire Protection Association.
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1. Scope
This publication describes graphic symbols used to represent electrical wiring and equipment on construction drawings. In this publication, the term “electrical” is used to include electrical, electronic, and communications systems covered by the National Electrical Code (NFPA 70). This publication also summarizes recommended drawing practices for electrical construction drawings.
1.1
Symbols Included
This standard is limited to North American symbols for electrical wiring and equipment.
1.2
1.3 Regulatory and Other Requirements a) All information in this publication is intended to conform to the National Electrical Code (ANSI/NFPA 70). b) General requirements for installing electrical products and systems are described in NECA 1, Standard Practices for Good Workmanship in Electrical Contracting (ANSI). Other National Electrical Installation Standards provide additional guidance for installing particular types of electrical products and systems. A complete list of NEIS is provided in Annex C.
Symbols Not Included
Symbols from publications of the International Electrotechnical Commission (IEC) are not included in this standard. Symbols for equipment and systems not covered by the NEC are not included in this standard.
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2. Purpose of Symbols
Symbols are a shorthand way of showing the locations, types, and sizes or ratings of electrical wiring
Table 1: Symbol Groups Group 1.0 1.1 1.2 2.0 2.1 2.2 2.3 2.4 3.0 4.0 5.0 5.1 6.0 7.0 7.1 7.2 8.0 9.0 9.1 9.2 10.0 11.0 11.1 11.2 12.0 13.0 14.0 ■ 2
Descrption Wiring Methods Raceways—Indicators Raceways—Boxes and Busways Luminaire (Lighting Fixtures) Luminaire Fixtures—Basic Modifiers Mounting Luminaire Fixtures—Basic Modifiers Orientation Luminaire Fixtures—Basic Modifiers Emergency Luminaire Fixtures—Extended Fixtures Outlets and Receptacles Switches and Sensors Motors—Controls Motorized & HVAC Equipment Security Fire Alarm Communications & Panels Fire Alarm Indicators Fire Alarm Sensors Distribution Equipment Communications—Teledata Communications—Audio/Visual Communications—Equipment Site Work Schematic Fault Circuit Interrupter, Personal Protection One-Line Diagram Symbols— Switchboard Meters Schematic and One-Line Diagram Symbols—Switches Miscellaneous Abbreviations Nurse Call System
and equipment, and the interrelationships between these items. It should be emphasized that drawings need to be supplemented with specifications in order to establish the details of the electrical systems.
2.1
Organization of this Standard
This standard contains symbols commonly and primarily used on electrical construction drawings. Related symbols are organized into different groups, and each symbol within a group has its own unique identifying number. The group and symbol numbers are not significant except as a convenient way to identify individual symbols. See Table 1 for groups.
2.2
Alternate Fire Safety Symbols
The fire protection industry has developed and published symbols, not all of which are currently in widespread use on electrical construction drawings. They are shown for reference in Annex A.
2.3
References
This publication does not include every known North American symbol for electrical equipment shown on construction drawings. Some older symbols are either becoming obsolete over time or have been superseded by newer symbols (which are shown in this publication). Some electrical symbols are not widely used on construction drawings, but usually on wiring schematics and other types of more specialized drawings. Other drawing symbol standards and publications are listed for reference in Annex C.
3. Drafting Practices for Electrical Construction Drawings 3.1
Symbol Design and Presentation
a) The symbols in this standard are widely understood by those in the electrical design and construction field. Other symbols may also be used, provided that a suitable explanation of their meaning is included on the drawing where that symbol is used, or on a symbol legend sheet. b) The orientation of a symbol on a drawing does not alter the meaning of the symbol. c) Every symbol making up part of an electrical circuit must begin with and end with another symbol. When a circuit continues on a different drawing, the end of the circuitry symbol must be appropriately noted on both drawings. This circuitry continued notice is necessary for both vertical and horizontal circuits. d) Circuitry symbols may cross one another at any angle. e) The angle at which a circuitry symbol meets another symbol has no particular significance unless otherwise noted. Circuits normally meet one another at a junction box, pull box, or piece of electrical utilization or communications equipment. f) Future circuits and future equipment should be indicated by dashed lines and clearly marked as future circuits or future equipment on every drawing where applicable. g) Luminaire symbols should be drawn whenever possible in their appropriate proportions, orientation, and shape. Where a luminaire symbol drawn to scale is too small to reproduce clearly, the symbol
may be enlarged to an appropriate size while maintaining proportion and orientation.
3.2
General Drafting Practices
a) Electrical systems should be shown on plans separate from the architectural, structural, mechanical, and other systems. For clarity, it is recommended that the electrical symbols be drawn darker than the background drawing showing the building structure and/or other systems. b) Different electrical systems such as power distribution, luminaire, voice/data, fire alarm, and security/ access control should be shown on separate plans if combining them on the same drawings would reduce clarity. c) Electrical plans are generally drawn to scale. However, graphic symbols indicate only the approximate locations of electrical equipment. Provide dimensions, details, elevations, and sections where accurate locations of outlets, lighting fixtures, and other equipment are required. d) Electrical wiring required for other systems such as HVAC, manufacturing equipment, data processing systems, etc, should be shown on the electrical drawings where practical, if the installation is included in the electrical contract.
3.3
CADD Practices
The following drafting practices are recommended when using computer-aided design and drafting (CADD) systems to prepare electrical construction drawings. a) All CADD electrical construction drawings should be created at full scale, (1" = 1"), and should be plot3 ■
NECA 100
Symbols for Electrical Construction Drawings
ted at an appropriate scale on uniform sheets of sufficient size and separate from architectural, structural, mechanical or other drawings. Within a single drawing set, the drawing scale should be the same on as many drawings as possible. b) All electronic files should include no more than one floor level of a building per electronic file. In no case should two different floors of any building be included in one electronic file. c) Architectural, structural or mechanical items on the electrical construction drawings should be plotted with lighter weight lines than the electrical items. d) Electronic files should use blocks (or cells) for all symbology. Blocks (or cells) should use a uniform scale. Non-uniformly scaled blocks and nested blocks should not be used. Instead of exploding blocks to achieve a desired graphic effect, create different variations of an existing block to accomplish the graphic symbol appearance needed. e) No entities should reside on layer 0. This layer is used for referencing of blocks and blocks only. f) All entities should be placed on layers related to their disciplines as defined by the CAD Layer Guidelines published by the American Institute of Architects. These include Electrical, Plumbing, HVAC, Architectural, Structural, Civil/Site, Mechanical, Process Piping, and Telecommunications/Data. The purpose of using different layers is to rationally develop designs using shared drawings. Therefore, it is suggested that the AIA layer naming convention be followed. Ordering information for CAD Layer Guidelines is shown in Annex C.
3.4
Electrical Construction Drawing Set
A typical set of electrical construction drawings includes the following: a) Plan for each floor, roof, surrounding site, and other area with electrical installations. b) Site plan(s) showing incoming utility services and substations; exterior transformers; feeders, trunk ■
4
lines and backbone cables between buildings; and site lighting. c) Symbol list and abbreviation list. d) Schedule(s) of lighting fixtures, mechanical equipment connections, transformers, etc. as appropriate. Typical schedules are shown in Annex B. e) Riser and/or one-line diagram(s) for power distribution and other systems, as appropriate. Typical risers and one-line diagrams are shown in Annex B.
Contents for Symbol Groups
1.0
Wiring Methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 1.1 Raceways - Indicators. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 1.2 Raceways - Boxes and Busways . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.0
Luminaire Fixtures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 2.1 Luminaire Fixtures—Basic Modifiers—Mounting. . . . . . . . . . 11 Luminaire Fixtures —Basic Modifiers—Orientation. . . . . . . . 11 2.2 2.3 Luminaire Fixtures —Basic Modifiers—Emergency . . . . . . . . 12 2.4 Luminaire Fixtures—Extended Modifiers . . . . . . . . . . . . . . . . . 12
3.0
Outlets and Receptacles. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.0
Switches and Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.0
Motors—Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 5.1 Motorized and HVAC Equipment . . . . . . . . . . . . . . . . . . . . . . . 20
6.0
Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
7.0
Fire Alarm Communications and Panels. . . . . . . . . . . . . . . . . . . . . . . . 23 7.1 Fire Alarm Indicators. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 7.2 Fire Alarm Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
8.0
Power Distribution Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
9.0
Communications - Teledata . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 9.1 Communications - Audio/Visual . . . . . . . . . . . . . . . . . . . . . . . . 30 9.2 Communications - Equipment. . . . . . . . . . . . . . . . . . . . . . . . . . 31
10.0
Site Work. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
11.0
Schematic Fault Circuit Interrupter, Personal Protection . . . . . . . . . . 33 11.1 One-Line Diagram Symbols—Switchboard Meters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 11.2 Schematic and One-Line Symbol Diagrams—Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
12.0
Miscellaneous . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
13.0
Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
14.0
Nurse Call System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
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NECA 100
Symbols for Electrical Construction Drawings
1.0 Raceways Number
Preferred Symbol
Description
1.001
Conduit concealed in finished areas, exposed in unfinished areas.
1.002
Conduit concealed in or under floor slab.
1.003
Non-rigid raceway system.
1.004
NE
Normal/emergency circuit.
1.005
EB
Emergency battery system wiring, minimum 10 AWG.
1.006
HT
Heat trace.
1.007
P
Underfloor power raceway.
1.008
T
Underfloor telecommunications raceway.
1.009
PT
1.010
S
1.011
PTD
Underfloor raceway for power, telephone, and data.
1.012
UCP
Undercarpet flat conductor cable (FCC) wiring system, power.
UCT
Undercarpet flat conductor cable (FCC) wiring system, telephone
1.013
■ 6
Underfloor raceway for power and telecommunications.
Underfloor signal raceway.
Symbols for Electrical Construction Drawings
NECA 100
1.0 1.0 Raceways Raceways Number 1.014
Preferred Symbol UCD
Description Undercarpet flat conductor cable (FCC) wiring system, data.
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NECA 100
Symbols for Electrical Construction Drawings
1.1 Raceways—Indicators Number
Preferred Symbol
Description
1.101
Conduit stub. Terminate with bushing or cap if underground.
1.102
Conduit turning up.
1.103
Conduit turning down.
1.104
SZ 2C,4#1&1#6GND. OR SZ 53cm,4#1&1#6GND.
1.105
(2)SZ 2C,4#1&1#6GND. OR (2)SZ 53cm,4#1&1#6GND.
1.106
Indicates trade size 2” or 53 mm conduit with (4) 1 AWG and (1) 6 AWG ground.
Indicates (2) trade size 2” or 53 mm conduits with (4) 1 AWG and (1) 6 AWG ground conductors in each conduit.
Homerun to panelboard. Number of arrows indicates number of circuits. (Example: Homerun to panel L211 CKTS. #1 and #3.)
L211–1,3
1.107
Flexible connection to equipment.
1.108
Direct connection to equipment.
1.109
Branch circuit, full hashes indicate ungrounded-“hot” (or switch-leg) circuit conductors. Half hashes indicates grounded neutral circuit conductors. (No hashes indicates 1 hot and 1 neutral.) Dots indicate grounding conductors. Equipment bond size U.N.O. “IG” indicates an isolated grounding conductor.
IG
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Symbols for Electrical Construction Drawings
NECA 100
1.2 Raceways—Boxes and Busways Number
Preferred Symbol
1.201
Description Underfloor raceway system junction box, flush floor mounted.
J
1.202
P
Power pole with devices indicated in the specifications and on the drawing, “P” indicates type, “2” indicates circuit. 2
1.203
T
1.204
TP
Telecom pole with devices indicated in the specifications and on the drawings, “T” indicates type.
Telecom/Power pole with devices indicated in the specifications and on the drawings, “TP” indicates type, “2” indicates power circuit.
2 1.205
Pull box—size as indicated or required. PB OR
1.206
Cabletray size as indicated. TR
TR
TR
TR
TR
TR
BW
BW
BW
Busway with cable tap box, rating and type as indicated on drawings.
BW
Busway with plug-in device as indicated, shown with fused disconnect.
1.207
Cabletray size as indicated, concealed.
1.208 CTB
1.209 BW
BW F
1.210
Busway feeding up.
1.211
Busway feeding down.
Busway expansion joint.
1.212 BW
1.213
Wireway, size as indicated or required. WW
WW
WW
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NECA 100
Symbols for Electrical Construction Drawings
2.0 Luminaire (Lighting Fixtures) Number
Preferred Symbol
Description
2.001
Luminaire: (drawn to approximate shape and to scale or large enough for clarity).
2.002
Luminaire strip type (length drawn to scale).
2.003
Fluorescent strip luminaire.
2.004
Fixture—double or single head spotlight.
2.005
Exit luminaire fixture. Arrows and exit face as indicated on drawings (mounting heights to be determined by job specifications).
2.006
Light track. Length as indicated on the drawings, with number of fixtures as indicated on drawings, and as indicated in the fixture schedule.
2.007
Emergency battery remote luminaire heads.
2.008
Emergency battery unit with luminaire heads.
2.009
Single luminaire pole mounted site luminaire fixture.
2.010
Tw i n l u m i n a i r e p o l e m o u n t e d s i t e l u m i n a i r e f i x ture.
2.011
Roadway luminaire—cobra head.
2.012
Bollard type site luminaire.
2.013
Outdoor wallpack.
■ 10
Symbols for Electrical Construction Drawings
NECA 100
2.1 Luminaire Fixtures—Basic Modifiers Mounting Number 2.100
Preferred Symbol
Description Surface mounted fixture.
Recessed fixture.
Wa l l m o u n t e d f i x t u r e .
Suspended, pendant, chain, stem or cable hung fixture.
Pole mounted with arm.
Pole mounted on top.
In-ground or floor mounted. (Box around symbol.)
2.2 Luminaire Fixtures—Basic Modifiers Orientation 2.200
A c c e n t / d i r e c t i o n a l a r r o w, w i t h o r w i t h o u t t a i l . (Drawn from photometric center in direction of optics or photometric orientation.) Directional aiming line. (Drawn from photometric center and may be extended to actual aiming point if required.) Tr a c k m o u n t e d ; l e n g t h , l u m i n a i r e t y p e s a n d q u a n t i t i e s a s s h o w n . ( Tr a c k l e n g t h d r a w n t o scale.)
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NECA 100
Symbols for Electrical Construction Drawings
2.3 Luminaire Fixtures—Emergency Number
Preferred Symbol
Description
2.300
NOTE:
Luminaire providing emergency illumination. (Filled in.) M o d i f i e r s a r e s h o w n w i t h s p e c i f i c b a s e s y m b o l s f o r c l a r i t y. Each modifier can be used with any of the base symbols.
2.4 Luminaire Fixtures—Extended Modifiers 2.401
A a 2
2.402
A a
+48”
NL 2
Standard designations for all luminaire fixtures. “A” = Fixture type, refer to fixture schedule “NL” = Unswitched night light “2” = Circuit number “a” = Switch control
Mounting height.
2.403
Louvers.
2.404
Recessed, emergency fixture.
■ 12
Symbols for Electrical Construction Drawings
NECA 100
3.0 Outlets and Receptacles Number
Preferred Symbol
3.001
Description Floor duplex receptacle. F=flush MTD. S=surface MTD.
F
3.002
3.003
D u p l e x c o n v e n i e n c e r e c e p t a c l e . 2 0 A 1 2 5 V.
Duplex convenience receptacle on emergency/standby circuit. Specify panelboard and circuit.
EP–2 CKT.1
3.004
3.005
Single convenience receptacle.
Single convenience receptacle on emergency/standby circuit. Specify panelboard and circuit.
EP–2 CKT.3
3.006
3.007
Double duplex convenience receptacle.
Double duplex convenience receptacle on emergency/standby circuit. Specify panelboard and circuit.
EP–2 CKT.5
3.008
Multi-outlet assembly with outlets on centers as indicated on the drawings and in the specifications, mounted 6" above counter or at height as directed, A - indicates type.
A 3.009
M u l t i o u t l e t a s s e m b l y, d e v i c e s a s i n d i c a t e d .
1
Special receptacle - typical notation: 1— indicates example
3.010
1
1
OR
“ 1 ” = _ _ A , _ _ _ / _ _ _ V. , _ P o l e , _ W i r e , _ N E M A _ _ - _ _ “ 2 ” = _ _ A , _ _ _ / _ _ _ V. , _ P o l e , _ W i r e , _ N E M A _ _ - _ _ “ 3 ” = _ _ A , _ _ _ / _ _ _ V. , _ P o l e , _ W i r e , _ N E M A _ _ - _ _
3.011
Clock hanger outlet recessed mounted 8’-0” AFF or 8” below ceiling as appropriate and as directed.
3.012
Flush mounted floor box, adjustable, with both power and voice/data receptacles.
F 3.013
J
J
Junction box. “AxBxC” indicates dimensions of junction box in either inches or centimeters.
AxBxC
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NECA 100
Symbols for Electrical Construction Drawings
3.0 Outlets and Receptacles Number
Preferred Symbol
Description
3.014
D u p l e s r e c e p t a c l e c e i l i n g m o u n t e d 2 0 A 1 2 5 V.
3.015
Double duplex receptacle—ceiling mounted.
Receptacles And Outlets Ty p i c a l O u t l e t N o t a t i o n s : “a”
=
Switched outlet, “a”—indicates switch control.
“B”
=
Pedestal mounted on bench top.
“BF”
=
B e l o w f l o o r.
“C”
=
M o u n t e d 6 ” a b o v e c o u n t e r o f 4 2 ” A F F. C o o r d i n a t e e x a c t m o u n t i n g h e i g h t w i t h architectural drawings.
“CLG”
=
Ceiling mounted.
“D”
=
Dedicated device on individual branch circuit.
“E”
=
E m e r g e n c y.
“ E X I S T. ” =
Existing device/equipment.
“F”
=
Flush floor box with fire/smoke rated penetration.
“GFCI”
=
G r o u n d f a u l t c i r c u i t i n t e r u p t e r, p e r s o n a l p r o t e c t i o n .
“GFPE”
=
Ground fault protection of equipment.
“H”
=
Horizontally mounted.
“IG”
=
Isolated ground receptacle with separate green ground conductor to isolated ground bus in panel.
“M”
=
Modular furniture service—provide flexible connection, coordinate exact location with furniture plans.
“PED”
=
Pedestal mounted with two hour fire/smoke rated penetration.
“PT”
=
Poke thru with two hour fire/smoke rated penetration.
“S”
=
Surface mounted floor box.
“SP”
=
Surge protection receptacle.
“T”
=
Ta m p e r r e s i s t a n t s a f e t y r e c e p t a c l e .
“TL”
=
Tw i s t - l o c k .
“W”
=
Wa l l m o u n t e d d e v i c e a t 4 8 ” A F F u n l e s s o t h e r w i s e i n d i c a t e d .
“WP”
=
We a t h e r p r o o f r e c e p t a c l e w i t h “ N RT L ” l i s t e d c o v e r p l a t e f o r w e t l o c a t i o n w i t h plug installed. MTD. 48” AFF unless otherwise indicated.
+XX
=
Dimensioned height.
■ 14
Symbols for Electrical Construction Drawings
NECA 100
4.0 Switches and Sensors Number
Preferred Symbol
Description
4.001
$
or
S
Single pole switch.
4.002
$2
or
S2
Double pole switch.
4.003
$3
or
S3
Three way switch.
4.004
$4
or
S4
Four way switch.
4.005
$a
or
Sa
Switch control (lower case letter).
4.006
$CB
or
SCB
Circuit breaker switch.
4.007
$DT
or
SDT
Single pole/double throw switch.
4.008
$G
or
SG
G l o w s w i t c h t o g g l e , g l o w s i n o ff p o s i t i o n .
4.009
$H
or
SH
Horizontally mounted—with on position to the left.
4.010
$K
or
SK
Key operated switch.
4.011
$KP
or
SKP
Key operated switch with pilot light on when switch is on.
4.012
$LV
or
SLV
Low voltage switch.
4.013
$LM
or
SLM
Low voltage master switch.
15 ■
NECA 100
Symbols for Electrical Construction Drawings
4.0 Switches and Sensors Number
Preferred Symbol
Description
4.014
$MC
or
SMC
Momentary contact switch.
4.015
$P
or
SP
Switch with pilot light on when switch is on.
4.016
$T
or
ST
Ti m e r s w i t c h .
4.017
$WP
or
SWP
We a t h e r p r o o f s i n g l e p o l e s w i t c h .
4.018
4.019
4.020
D
D i m m e r s w i t c h . R a t e d 1 0 0 0 W, u n l e s s o t h e r w i s e i n d i c a t e d . “ LV ” = l o w v o l t a g e “ F L ” = f l u o r e s c e n t .
M
O c c u p a n c y s e n s o r, w a l l m o u n t e d w i t h o ff — a u t o override switch.
M
Occupancy sensor—ceiling mounted, “P”—indicates multiple switches wired in parallel.
P
4.021
■ 16
$PROJ
or
SPROJ
Motorized projection screen raise/lower switch.
Symbols for Electrical Construction Drawings
NECA 100
5.0 Motorized and HVAC Equipment—Controls Number
Preferred Symbol
5.001
Disconnect switch, unfused type, size as indicated on drawings. “xxA” indicates amperage.
xxA
5.002
xxAF yyAT
5.003
F
xxAF CB yyAT
5.004
ASD
5.006
$M RV NEMA x
5.008
Disconnect switch, fused type, size as indicated on d r a w i n g s . “ x x A F ” i n d i c a t e s f r a m e s i z e . “ x x AT ” i n d i cates trip size. E n c l o s e d c i r c u i t b r e a k e r, s i z e a s i n d i c a t e d . “ x x A F ” i n d i c a t e s f r a m e s i z e . “ x x AT ” i n d i c a t e s t r i p s i z e .
M a g n e t i c c o n t a c t o r, s i z e a s i n d i c a t e d o n d r a w i n g s .
C
5.005
5.007
Description
F NEMA x xxA–xP
Adjustable speed drive.
Motor starter switch.
M a g n e t i c m o t o r s t a r t e r. “ RV ” i n d i c a t e s r e d u c e d voltage. Starter size as indicated.
Combination magnetic starter and disconnect switch. Starter size and fuse rating as indicated.
5.009
ATC
Automatic temperature control panel.
5.010
CP
Equipment control panel.
5.011
5.012
5.013
R
TD
TS P
R e l a y.
To g g l e d i s c o n n e c t s w i t c h .
Thermal motor switch with handle guard and padl o c k c a p a b i l i t y. “ P ” — i n d i c a t e s p i l o t l i g h t .
17 ■
NECA 100
Symbols for Electrical Construction Drawings
5.0 Motorized and HVAC Equipment—Controls Number
Preferred Symbol
Description
5.014
Emergency power shunt trip.
5.015
Pushbutton.
5.016
O n / o ff p u s h b u t t o n s t a t i o n .
5.017
Three function pushbutton switch (up/down/stop).
5.018
5.019
Firestat.
F
5.020
H
5.021
T
5.022
Aquastat.
A
T
Humidistat.
Line voltage thermostat.
L
Low voltage thermostat.
LV
5.023
T
Thermostat.
5.024
SV
Solenoid valve.
5.025
TS
Ti m e s w i t c h .
5.026
AF
Air flow switch.
■ 18
Symbols for Electrical Construction Drawings
NECA 100
5.0 Motorized and HVAC Equipment—Controls Number
Preferred Symbol
5.027
EP
5.028
HOA
5.029
FS
5.030
IC
Description Electric/pneumatic switch.
H a n d / o ff / a u t o m a t i c s e l e c t o r s w i t c h .
Flow switch.
Irrigation control.
5.031
LS
Limit switch.
5.032
PE
Pneumatic/electric switch.
5.033
PC
Photo cell or photo control.
5.034
PS
Pressure switch.
19 ■
NECA 100
Symbols for Electrical Construction Drawings
5.1 Motorized and HVAC Equipment Number
Preferred Symbol
5.101
Description C a p a c i t o r.
5.102
M o t o r “ 3 ” — i n d i c a t e s h o r s e p o w e r. 3
5.103
M o t o r i z e d d a m p e r. D
5.104
B a s e b o a r d h e a t e r.
5.105
Baseboard heater with box.
5.106
R e s i s t a n c e h e a t e r.
5.107
U n i t t y p e h e a t e r.
5.108
Ceiling fan.
5.109
Paddle fan.
5.110
Wa l l f a n .
5.111
Wa t e r h e a t e r. WH
■ 20
Symbols for Electrical Construction Drawings
NECA 100
6.0 Security Number 6.001
Preferred Symbol C WP
Description C C V T c a m e r a . “ W P ” i n d i c a t e s w e a t h e r- p r o o f e x t e r i or camera.
6.002
CCTV
6.003
MTV
6.004
B
Doorbell.
6.005
B
D o o r b u z z e r.
6.006
B
Door chime.
6.007
CCTV Coaxial cable outlet and power outlet.
CCTV monitor outlet.
E l e c t r i c d o o r o p e n e r.
DR
6.008
ES
Electric door strike.
6.009
IC
Intercom unit—flush MTD.
6.010
MI
Master intercom and directory unit.
6.011
6.012
M o t i o n d e t e c t o r.
MD
Security door alarm magnetic lock.
ML
6.013
WP
S e c u r i t y c a r d r e a d e r. “ W P ” i n d i c a t e s w e a t h e r- p r o o f .
CR
21 ■
NECA 100
Symbols for Electrical Construction Drawings
6.0 Security Number 6.014
6.015
Preferred Symbol SCP
DC
6.016
6.017
6.018
6.019
Description Security control panel.
Security door contacts.
Security exit push button.
K
ID
UD
Security keypad.
I n f r a - r e d d e t e c t o r.
U l t r a s o n i c d e t e c t o r.
6.020
DA
Door alarm.
6.021
P
P a n i c b a r.
■ 22
Symbols for Electrical Construction Drawings
NECA 100
7.0 Fire Alarm Communications and Panels Number 7.001
Preferred Symbol
M
7.002
Description Fire alarm master box.
F i r e f i g h t e r ’s p h o n e .
7.003
FT
C o d e d t r a n s m i t t e r.
7.004
DK
Drill key switch.
7.005
K
Key repository (knox box).
7.006
FAA
Annunciator panel.
7.007
FACP
Fire alarm control panel.
7.008
EVAC
Vo i c e e v a c u a t i o n p a n e l .
7.009
FATC
Fire alarm terminal cabinet.
7.010
BATT
B a t t e r y p a c k a n d c h a r g e r.
7.011
ASFP
Air sampling control/detector panel with associated air sampling piping network.
7.012
TPR
Tr a n s p o n d e r.
7.013
IAM
Individual addressable module.
23 ■
NECA 100
Symbols for Electrical Construction Drawings
7.0 Fire Alarm Communications and Panels Number
Preferred Symbol
Description
7.014
ZAM
7.015
CZAM
Control zone adapter module.
7.016
MZAM
Monitor zone adapter module.
7.017
SYN
Synchronized module.
7.018
KHS
Kitchen hood system.
■ 24
Zone adapter module.
Symbols for Electrical Construction Drawings
NECA 100
7.1 Fire Alarm Indicators Number
Preferred Symbol
Description C o n t r o l r e l a y.
7.102
DH
D o o r h o l d e r.
7.103
F
Horn and strobe.
7.104
F
Mini horn and strobe.
7.105
H
7.106
S
7.107
F
Bell and strobe.
7.108
F
Buzzer and strobe.
7.109
F
Chime and strobe.
7.110
F
▲
CR
H o r n u n i t o n l y.
▲
7.101
S t r o b e u n i t o n l y.
S
7.111
7.112
7.113
Speaker and strobe.
LED pilot light.
F
S
WP
I n d i c a t i n g b e a c o n . “ W P ” i n d i c a t e s w e a t h e r- p r o o f .
Speaker—ceiling mounted.
25 ■
NECA 100
Symbols for Electrical Construction Drawings
7.2 Fire Alarm Sensors Number
Preferred Symbol
Description
7.201
F
Manual pull station.
7.202
S
S m o k e d e t e c t o r.
7.203
S
7.204
RTS
7.205
S
7.206
S
7.207
S
7.208
S
7.209
B
Duct smoke detector with two auxiliary contacts. D
Remote station for duct mounted smoke detectors.
A
Area type smoke detector used at duct work opening.
E
Elevator recall with auxiliary contacts.
SC
Self-contained smoke detector—single station type.
V
Smoke detector—visual and audible signal.
R
Beam smoke detector “S”—indicates sending unit “ R ” — i n d i c a t e s r e c e i v e r.
7.210
C
C a r b o n m o n o x i d e d e t e c t o r. L i n e v o l t a g e w i t h b a t tery backup.
7.211
F
F l a m e d e t e c t o r.
7.212
H
Automatic heat detector (135°F rate of rise).
7.213
H
■ 26
F
A u t o m a t i c h e a t d e t e c t o r. “ F ” — i n d i c a t e s f i x e d t e m p e r a t u r e 1 9 0 ° F.
Symbols for Electrical Construction Drawings
NECA 100
7.2 Fire Alarm Sensors Number 7.214
Preferred Symbol H2
Description H y d r o g e n d e t e c t o r.
7.215
D
7.216
FS
Wa t e r f l o w s w i t c h .
7.217
PS
Low pressure switch.
7.218
TS
Ta m p e r s w i t c h .
7.219
PIV
Post indicator valve.
7.220
EOL
E n d - o f - l i n e r e s i s t o r.
FS
M o t o r o p e r a t e d f i r e / s m o k e d u c t d a m p e r.
27
■
NECA 100
Symbols for Electrical Construction Drawings
8.0 Power Distribution Equipment Number
Preferred Symbol
Description
8.001
Lighting or power panel, recessed.
8.002
Lighting or power panel, surface.
8.003
Distribution panel.
8.004
Lighting or power panel on normal/generator f e e d e r.
8.005
D i s t r i b u t i o n p a n e l o n n o r m a l / g e n e r a t o r f e e d e r.
MCC
8.006
8.007
M o t o r c o n t r o l c e n t e r.
T T45-1 XFMR NUMBER
D r y t y p e t r a n s f o r m e r, r e f e r t o t r a n s f o r m e r s c h e d u l e , “T45”—indicates transformer type floor mounted. Unless otherwise indicated, “W”—indicates wall, “S”—indicates suspended. “R”—indicates K rating.
8.008
T
8.009
CT
8.010
G
8.011
M
Meter—single.
8.012
M
Meter and socket.
Tr a n s f o r m e r — p a d m o u n t .
Current transformer cabinet.
xxkW
8.013 TS
■ 28
G e n e r a t o r. S i z e a s n o t e d .
Tr a n s f e r s w i t c h . “ T S ” = m a n u a l t r a n s f e r s w i t c h . “ AT S ” = a u t o m a t i c t r a n s f e r s w i t c h .
Symbols for Electrical Construction Drawings
NECA 100
9.0 Communications—Teledata Number
Preferred Symbol
Description
9.001
▼
Data outlet.
9.002
▼
Data outlet floor type. “F” indicates flush mounted. “S” indicates surface mounted.
F
9.003
▼
Te l e p h o n e / d a t a o u t l e t .
9.004
▼
Te l e p h o n e / d a t a o u t l e t f l o o r t y p e . “ F ” i n d i c a t e s flush mounted. “S” indicates surface mounted. F
9.005
▼F
Te l e p h o n e o u t l e t .
9.006
▼W
Te l e p h o n e o u t l e t — w a l l m o u n t e d .
9.007
▼
Te l e p h o n e o u t l e t f l o o r t y p e . “ F ” i n d i c a t e s f l u s h mounted. “S” indicates surface mounted.
F
29 ■
NECA 100
Symbols for Electrical Construction Drawings
9.1 Communications—Audio/Visual Number
Preferred Symbol
9.101
Description Call in switch.
9.102
TV
C a b l e a n t e n n a s y s t e m o u t l e t . ( C AT V )
9.103
TV
M a s t e r a n t e n n a s y s t e m o u t l e t . ( M AT V ) M
9.104
M
Microphone outlet—floor mounted.
9.105
M
Microphone outlet—wall mounted.
9.106
S
Speaker—ceiling mounted.
9.107
S
Speaker—wall mounted.
9.108
▼
9.109
■
S
P
Speaker horn.
Speaker bi-directional paging—wall mounted.
9.110
P
Speaker bi-directional paging—ceiling mounted.
9.111
IC
Intercom unit—flush mounted.
9.112
MI
Master intercom and directory unit.
9.113
VC
Vo l u m e c o n t r o l .
30
Symbols for Electrical Construction Drawings
NECA 100
9.2 Communications—Equipment Number
Preferred Symbol
Description
9.201
Equipment cabinet.
9.202
Equipment rack—wall mounted.
9.203
Equipment rack—free standing.
9.204
9.205
TCC
Te r m i n a l c a b i n e t w i t h 3 / 4 ” p l y w o o d b a c k i n g .
Plywood backboard.
31
■
NECA 100
Symbols for Electrical Construction Drawings
10.0 Site Work Number
Description
10.001
UF
U n d e r g r o u n d f e e d e r.
10.002
UT
Underground telephone.
10.003
UFA
Underground fire alarm.
10.004
UTV
U n d e r g r o u n d t e l e v i s i o n ( C AT V ) .
10.005
E
Above ground pole mounted electrical.
10.006
T
Above ground pole mounted telephone.
10.007
F
Above ground pole mounted fire alarm.
10.008
TV
A b o v e g r o u n d p o l e m o u n t e d t e l e v i s i o n ( C AT V ) .
10.009
MH
Manhole.
10.010
HH
Handhole.
10.011
P
10.012
10.013
■
Preferred Symbol
32
Pxxxx
E
T
U t i l i t y p o l e . “ P x x x x ” i n d i c a t e s p o l e n u m b e r.
Combination pre-fabricated manholes for power a n d t e l / d a t a s y s t e m s . “ E ” = d e n o t e s p o w e r, “ T ” = denotes tel/data.
“J” hook.
Symbols for Electrical Construction Drawings
NECA 100
11.0 Schematic and One-line Diagram Symbols Number
Preferred Symbol
11.001
Description C a p a c i t o r.
11.002
Circuit breaker (open). “xxAF” indicates frame size. “ y y AT ” i n d i c a t e s t r i p s i z e .
xxAF yyAT
11.003
Circuit breaker (enclosed). “xxAF indicates frame s i z e . “ y y AT ” i n d i c a t e s t r i p s i z e .
xxAF yyAT
11.004
P r i m a r y d r a w o u t t y p e c i r c u i t b r e a k e r. “ x x A F ” i n d i c a t e s f r a m e s i z e . “ y y AT ” i n d i c a t e s t r i p s i z e .
xxAF yyAT 11.005
L o w v o l t a g e d r a w o u t t y p e c i r c u i t b r e a k e r. “ x x A F ” i n d i c a t e s f r a m e s i z e . “ y y AT ” i n d i c a t e s t r i p s i z e .
xxAF yyAT
11.006 xxAF yyAT
zzA
Low voltage draw out type circuit breaker with current limiting fuses. “xxAF” indicates frame size. “yyAT” indicates trip size. “zzA” indicates fuse rating.
11.007
Contact, normally open (NO) (“TC”—with timed closing).
11.008
Contact, normally closed (NC). (“TO”—with timed opening).
CT
11.009
11.010
Current transformer cabinet.
Fused cutout. “zzA” indicates fuse rating.
zzA
11.011
Disconnect switch unfused.
11.012
zzA
11.013
Disconnect switch air break with fuse. “zzA” indicates fused rating. Fuse. “zzA” indicates fuse rating.
zzA
zzA
33
■
NECA 100
Symbols for Electrical Construction Drawings
11.0 Schematic and One-line Diagram Symbols Number
Preferred Symbol
Description
11.014
O v e r l o a d r e l a y.
11.015
Grounding connection—system and or equipment.
11.016
K2
11.017
Kirk key interlock system. “2”—indicates related kirk keys.
Lightning arrester and grounding to protect all phases.
3
11.018
M o t o r a n d l a b e l . “ 3 ” d e n o t e s h o r s e p o w e r.
xx-xx-x-x
MO
11.019
11.020
Motor operator for circuit breakers or switches.
N e t w o r k p r o t e c t o r.
PANEL Panelboard.
▼
11.021
11.022
11.023
Stress cone.
11.024
R e s i s t o r.
ST
11.025
11.026
34
Shunt trip.
Magnetic starter with NEMA size indicated.
1
■
Pothead.
Symbols for Electrical Construction Drawings
NECA 100
11.0 Schematic and One-line Diagram Symbols Number
Preferred Symbol
11.027
G r o u n d f a u l t c i r c u i t i n t e r r u p t e r, p e r s o n n e l p r o t e c tion.
GFCI
xxx KW xxxV-xø GENERATOR
G
▼
11.028
Description
xxx KVA xxxV xø xW PRI OOOO
G e n e r a t o r.
▼ Tx
OOOO
11.029
Tr a n s f o r m e r, d r y t y p e . U n l e s s o t h e r w i s e i n d i c a t e d .
xxxY/xxxV xø xW SEC
P o t e n t i a l t r a n s f o r m e r. “ 3 ” — i n d i c a t e s q u a n t i t y. (3) (3)
400-5A
OO
11.031
OO
11.030
C u r r e n t t r a n s f o r m e r. “ 3 ” — i n d i c a t e s q u a n t i t y, “ 4 0 0 5A” indicates ratio.
11.032
3-phase, 3-wire delta connection.
11.033
Corner grounded delta.
11.034
3-phase, 4-wire wye connection (grounded neutral).
11.035
AFD 3 xx-x-x
Adjustable frequency drive. 3 r e f e r e n c e s d e t a i l n u m b e r.
11.036
XX’ xxxV BUSDUCT
B u s d u c t o r b u s w a y.
11.037
XX’ xxxV WIREWAY
W i r e w a y.
35
■
NECA 100
Symbols for Electrical Construction Drawings
11.1 One-line Diagram Symbols—Switchboard Meters Number
Description
11.101
CM
11.102
TWM
11.103
VAR
Va r m e t e r.
11.104
A
A m m e t e r.
11.105
AS
Ammeter phase switch.
11.106
D
D e m a n d m e t e r.
11.107
GD
11.108
P
Synchroscope.
11.109
PF
P o w e r f a c t o r m e t e r.
11.110
■
Preferred Symbol
Hz
C u s t o m e r m e t e r.
To t a l i z i n g w a t t h o u r m e t e r.
G r o u n d d e t e c t o r.
F r e q u e n c y m e t e r.
11.111
V
11.112
VA
Vo l t - a m m e t e r.
11.113
VS
Vo l t m e t e r p h a s e s w i t c h .
36
Vo l t m e t e r.
Symbols for Electrical Construction Drawings
NECA 100
11.1 One-line Diagram Symbols—Switchboard Meters Number
Preferred Symbol
11.114
W
11.115
WM
Description Wa t t m e t e r.
Wa t t h o u r m e t e r.
37
■
NECA 100
Symbols for Electrical Construction Drawings
11.2 Schematic and One-line Diagram Symbols—Switches Number 11.201
Preferred Symbol N
E L
Tr a n s f e r s w i t c h .
11.202
Push button (start).
11.203
Push button (stop).
11.204
Limit switch.
11.205
Flow switch.
11.206
Pressure switch.
11.207
Float switch.
11.208
11.209
■
AUTO/MANUAL TRANSFER SWTICH xxA-xP
Description
38
R
P i l o t l i g h t . L e t t e r i n d i c a t e s c o l o r. E x a m p l e : R = r e d .
Solenoid.
Symbols for Electrical Construction Drawings
NECA 100
12.0 Miscellaneous Number
Preferred Symbol
Description
12.001
G
G r o u n d b a r. L e n g t h t o b e n o t e d .
12.002
AC
M e c h a n i c a l e q u i p m e n t t a g n u m b e r, r e f e r t o mechanical equipment schedule.
2
12.003
E q u i p m e n t t a g n u m b e r, r e f e r t o e q u i p m e n t s c h e d ule, “K”—indicates kitchen, “C”—indicates compute r.
K2
B
12.004
Note symbol, refer to note as indicated.
12.005
1
F e e d e r n u m b e r, r e f e r t o “ f e e d e r s c h e d u l e ” .
12.006
A
Ty p i c a l / s i m i l a r r o o m o r a r e a l a y o u t s y m b o l . “ A ” — indicates layout type.
12.007
A E–2
Ty p i c a l l a y o u t s y m b o l — r e f e r t o l a y o u t t y p e . “ A ” o n drawing E-2, circuits to be used are as indicated.
CKT/ P21–5,7
E–4
SCALE: N.T.S.
▼
12.009
DESCRIPTION
▼
2
12.008
B
E–2
12.010
2 E–4
D e t a i l h e a d e r, i n d i c a t i n g d e t a i l N o . 2 o n d r a w i n g E 4.
S e c t i o n i d e n t i f i e r, i n d i c a t i n g s e c t i o n “ B ” o n d r a w i n g E - 2 . L e f t o r r i g h t a r r o w.
D e t a i l i d e n t i f i e r, i n d i c a t i n g d e t a i l N o . 2 o n d r a w i n g E-4.
39
■
NECA 100
Symbols for Electrical Construction Drawings
13.0 Abbreviations Abbreviation
■
Description
Abbreviation
Description
1P
One pole
DIST
Distribution
2P
Two pole
DN
Down
3P
Three pole
DWG
Drawing
4P
Four pole
DT
Dusttight(*)
1P1W
One pole, one wire
E
Wired on emergency circuit
1P2W
One pole, two wire
EA
Each
2P2W
Two pole, two wire
EC
Electrical contractor
2P3W
Two pole, three wire
EF
Exhaust fan
3P2W
Three pole, two wire
ELEC
Electric(al)
3P3W
Three pole, three wire
EMER
Emergency
3P4W
Three pole, four wire
EMT
Electric metallic tubing
4P4W
Four pole, four wire
ENCL
Enclosure
A
Ampere
EOL
End of line
AC
Alternating current
EPO
Emergency power off
AF
AMP frame
EQUIP
Equipment
AFCI
Arc-fault circuit interrupter
EWC
Electric water cooler
AFF
Above finished floor
EWH
Electric water heater
AFG
Above finished grade
EXIST.
Existing
AHU
Air handling unit
F
Flush
AIC
Ampere interrupting capacity
FA
Fire alarm
AL
Aluminum
FBO
Furnished by others
AS
AMP switch
FC
Fire protection contractor
AT
AMP trip
FCU
Fan coil unit
ARCH
Architect
FDN
Foundation
ATS
Automatic transfer switch
FIXT
Fixture
AUD
Audiometer box connection
FLA
Full load amps
AUX
Auxiliary
FLEX
Flexible
A/V
Audio visual
FLR
Floor
AWG
American wire gauge
FMC
Flexible metallic conduit
BLDG
Building
FRE
Fiberglass reinforced epoxy conduit
C
Conduit (Generic term for raceway.
FURN
Furniture
Provide as specified.)
GC
General contractor
CAM
Camera
GEN
Generator
CAT
Catalog
GFCI
Ground fault circuit interrupter
CATV
Cable television
GFPE
Ground fault protection equipment
CB
Circuit breaker
GND
Grounded
CKT
Circuit
GRC
Galvanized rigid conduit
COL
Column
HGT
Height
C.T.
Current transformer
HP
Horsepower
CU
Copper
HV
High voltage
CL
Centerline
HVAC
Heating, ventilating and air
DC
Direct Current
conditioning
Delta
HW
Hot water
DET
Detector
Hz
Hertz (cycle) per second
DISC
Disconnect
IAM
Individual addressable module
40
Symbols for Electrical Construction Drawings
NECA 100
13.0 Abbreviations Abbreviation
Description
Abbreviation
Description
IC
Intercommunication
#
Number
ID
Identification
NTS
Not to scale
IG
Isolated ground
O2
Oxygen
IMC
Intermediate metal conduit
OHD
Overhead door operator
IPS
Interruptible power supply
P
Pole
IR
Passive infrared
PB
Pull box
JB
Junction box
PC
Plumbing system contractor
KCMIL
Thousand circular mils
PE
Primary service
K/O
Knock-out
PH ø
Phase
KVA
Kilovolt ampere
PNL
Panel(board)
KVAR
Kilovolt ampere reactive
PIV
Post indicating valve
KW
Kilowatt
PP
Power panel
LFMC
Liquidtight flexible metallic conduit
PR
Pair
LFNC
Liquidtight flexible nonmetallic conduit
PRI
Primary
LP
Lighting panelboard
PT
Potential transformer
LS
Limit switch
PVC
Polyvinyl chloride conduit
LTG
Lighting
PWR
Power
LV
Low voltage
RE
Remove existing
MAINT
Maintained
REC
Recessed
MAU
Make-up air unit
RECP
Receptacle
MAX
Maximum
REF
Roof exhaust fan
MC
Metal clad cable
RL
Relocate existing
MCB
Main circuit breaker
RM
Room
MCC
Motor control center
RMC
Rigid metal conduit
MD
Motorized damper
RT
Raintight(*)
MDP
Main distribution panel
RTU
Rooftop unit
MISC
Miscellaneous
RSC
Rigid steel conduit
MFR
Manufacturer
S
Surface mounted
MLO
Main lugs only
SCH
Schedule
MOD
Motor operated disconnect switch
SD
Smoke damper
MTD
Mounted
SE
Secondary electric service
MTG
Mounting
SEC
Secondary
MTS
Manual transfer switch
SIG
Signal
N
North
SN
Solid neutral
N/A
Not applicable
SP
Spare
NC
Normally closed
SPKR
Speaker
NEC
National Electrical Code
SPL
Splice
NF
Non-fused
SS
Stainless steel
NIC
Not in contract
STP
Shielded twisted pair
NL
Night light
STL
Carbon steel
NM
Nonmetallic sheathed cable
SUSP
Suspended
NO
Normally open
SW
Switch
NRTL
Nationally recognized testing lab
SWBD
Switchboard
(*) It is recommended that the appropriate NEMA designation be used in place of this abbreviation.
41
■
NECA 100
Symbols for Electrical Construction Drawings
13.0 Abbreviations Abbreviation
■
Description
Abbreviation
Description
SWGR
Switchgear
UTP
TC
Telephone cabinet
V
Volt
TCI
Telecommunications cabling installer
VT
Vaportight(*)
TCP
Temperature control panel
Y
Wye
TEL/DATA
Telephone/data
W
Watt
TEL
Telephone
W/
With
TERM
Terminal(s)
WH
Watthour
TV
Television
WP
Weatherproof
TYP
Typical
WP
Weatherproof
UC
Under counter
WT
Watertight(*)
UG
Underground
XFMR
Transformer
UH
Unit heater
XP
Explosion proof(*)
U.O.I.
Unless otherwise indicated
ZAM
Zone adapter module
UPS
Uninterruptible power source
+72
UTIL
Utility
42
TEMP
Temporary
Unshielded twisted pair
Mounting units to centerline above finished floor or grade
Symbols for Electrical Construction Drawings
NECA 100
14.0 Nurse Call System Number
Preferred Symbol
14.001
NCA
14.002
E
Description N u r s e c a l l a n n u n i c a t o r.
Emergency pull cord station.
14.003
Dome light with tone.
14.004 NC
Nurse call—patient station. “A” = denotes connection to remote annunicator in emergency room. “PC” = denotes patient pull station. “SA” = d e n o t e s s t a ff a s s i s t s t a t i o n .
14.005
DS
Duty station.
14.006
SS
S t a ff s t a t i o n .
14.007
NCC
Nurse call system central cabinet.
43
■
(Annexes are not a part of the standard)
Annex A: Alternate Fire Safety Symbols Not all of the following fire safety symbols are in common use on electrical construction drawings at this time. They are reprinted here for reference with permission from NFPA 170-1996, Fire Safety Symbols (ANSI). This excerpt does not represent the official position of the National Fire Protection Association, which is represented only by the standard in its entirety. The following symbols are copyright ©1996, National Fire Protection Association, Quincy, MA.
5-5 Symbols for Control Panels 505.1
Control Panel
Basic shape. (a)
FCP
Fire Alarm Control Panel
(b)
FSA
Fire System Annunciator
(c)
FSA
Fire Alarm Transponder or Transmitter
(d)
ESR
Elevator Status/Recall
(e)
FAC
Fire Alarm Communicator
(f)
HCP
Halon Control Panel
(g)
HVA
Control panel for heating, ventilation, air conditioning, exhaust stairwell pressurization or similar equipment.
5-6 Symbols Related to Means of Egress 5-6.1
Emergency Light, Battery-Powered
Number of lamps on unit to be indicated. Indicate if light head(s) [lamp(s)] is remote from battery.
5-6.2
Illuminated Exit Sign, Single Face
Indicate direction of flow for the face.
5-6.3
Illuminated Exit Sign, Double Face
Indicate direction of flow for each face.
5-6.4
Combined BatteryPowered Emergency Light and Illuminated Exit Sign
Number of lamps on unit to be indicated. Indicate if light head(s) [lamp(s)] is remote from battery. Indicate direction of flow for the face.
■
44
Symbols for Electrical Construction Drawings
NECA 100
Fire Safety Symbols 5-7 Symbols for Fire Alarms, Detection, and Related Equipment 5-7.1
Signal Initiating Devices and Switches. Referent (Synonym)
5-7.1.1
Manual Stations
Symbol
Comments Basic shape (a)
Halon H
(b)
Carbon Dioxide C
(c)
Dry Chemical D
Foam
(d) F
(e)
Wet Chemical W
(f)
Pull Station P
5-7.1.1.1*
Fire Service or Emergency Telephone Station
(a)
Accessible A
(b)
Jack J
Hand-set
(c) H
5-7.1.1.2
Abort Switch
5-7.1.2
Automatic Detection and Supervisory Devices
5-7.1.1.1†
Heat Detector (Thermal Detector)
Basic shape (a) R/F
(b)
Combination—Rate of Rise and Fixed Temperature Rate Compensation
R/C
(c)
Fixed Temperature F
(d)
Rate of Rise Only R
† Symbol orientation not to be changed. 45
■
NECA 100
Symbols for Electrical Construction Drawings
Referent (Synonym) 5-7.1.2.2†
Symbol
Comments
Smoke Detector
(a)
P
Photoelectric Products of Combustion Detector
I
Ionization Products of Combustion Detector
(b)
s s
5-7.1.2.3
Smoke Detector in Duct
5-7.1.2.4
Gas Detector
5-7.1.2.5†
Flame Detector (Flicker Detector)
5-7.1.2.6
Flow Detector/Switch
5-7.1.2.7†
Pressure Detector/Switch
s
s
5-7.1.2.8†
Level Detector/Switch
s
s
5-7.1.2.9
Tamper Detector
s
s
5-7.1.2.10
Valve with Tamper Detector/Switch
s
s
5-7.2
Indicating Appliances
5-7.2.1
Speaker/Horn (Flicker Detector)
5-7.2.2
Bell (Gong)
5-7.2.3
Water Motor Alarm (Water Motor Gong)
† Symbol orientation not to be changed. ■
46
(c)
BT
(d)
BR
Beam Transmitter Beam Receiver
Indicate ultraviolet, infrared, or visible radiation-type detector.
s
s
Specify type—water, low air, high air, etc.
Alternate term—tamper switch.
(a)
s
s
M
Shield optional.
Mini-Horn
Symbols for Electrical Construction Drawings
5-7.2.4
NECA 100
Referent (Synonym)
Symbol
Horn with Light
(a)
Horn with light as separate assembly.
(b)
Horn with light as one assembly.
5-7.2.5†
Light (Lamp, Signal Light, Indicator Lamp, Strobe)
5-7.3
Related Equipment
5-7.3.1
Door Holder
s
Comments
s
† Symbol orientation not to be changed. 47
■
Annex B: Typical Risers, One-line Diagrams, and Schedules This annex provides examples of typical schedules, riser diagrams, and one-line diagrams that are included in electrical construction drawings. A given set of drawings will not necessarily include every typical example included here. This annex includes the following: Type
Page
Panel schedule . . . . . . . . . . . . . . . . . . . . . . . 49 Lighting fixture schedule . . . . . . . . . . . . . . . 50 Transformer schedule . . . . . . . . . . . . . . . . . 51 Mechanical equipment schedule. . . . . . . . . 52 Feeder schedule . . . . . . . . . . . . . . . . . . . . . . 53 Electrical one-line diagram . . . . . . . . . . . . . 54 Fire alarm riser . . . . . . . . . . . . . . . . . . . . . . . 55
■
48
49
■
Load (VA) Trip
10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40
9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39
Trip
Bkr. Frame
Modifications: __________________________
Load Name
Total VA: ________________________
Load (VA)
Amps RMS. Sym.: ________________________________
Phase C: _____________________
42
8
7
41
6
5
Ckt. No.
4
C
3
B 2
A
Mains: __________________________
Location: _______________________________________________
Wires: ___________
1
Ckt. No.
Phase B: _____________________
Bkr. Frame
Mfg./Type: ________________________
Phase A: _____________________
Load Name
Phase: _____________
Enclosure: __________________________
Voltage: ___________________
Mount: _______________________
Panel: _____________
Panel Schedule
■
50
Type
Manufacturer
Catalog No.
Description
Lighting Fixture Schedule
Mounting
Lamps
51
■
Designation
Manufacturer
Catalog Number KVA
ø
PRI. Volts
PRI. Conductor Size/No.
Transformer Schedule
Sec. Volts
Sec. Conductor Size/No.
Ground Conductor Size/No.
Mounting
■
52
Designation
Description
Quantity
Volt
ø
FLA
HP
KVA
Min. Wire Size/Type
Mechanical Equipment Schedule
Max. Fuse Size
Min. CCT Amps
Remarks/ Disconnect Type
Feeder Schedule # No.
No. Runs
No. Wires/Size
Insul.
CU/AL
Conduit
Origin
Termination
53
■
NECA 100
Symbols for Electrical Construction Drawings
Electrical One-Line Diagram
FROM 480V U N I T S U B S TAT I O N # 8 FROM EMERG. SWITCHGEAR 3EH01B6 N
3EHA1B6B 1200A 4 8 0 V, 3 W + G , 3 P 65,000A RMS SYM CLOSING A N D W I T H S TA N D R AT I N G
E L
EMERGENCY DISTRIBUTION SWITCHBOARD 3 E H 0 1 C 6 B , 1 2 0 0 A , 4 8 0 V, 3 Ø , 3 W + G , 6 5 , 0 0 0 I E R
800A
800A
600A
1
1200A
125A
150A
3
2
4
EMERGENCY DISTRIBUTION SWITCHBOARD 3 E H M 8 D 8 B , 8 0 0 A , 4 8 0 V, 3 Ø , 3 W + G , 6 5 , 0 0 0 I E R
800A
▼
OOOO OOOO
400A
240A
240A
9
3EHT185 7 5 K VA 480V 3Ø 3W PRI
120/208V 3Ø 4W SEC
3EHL1B5
4
11
10
250/M 5 AFD 36-2-2
1
AFD 32-5-2
2
RV N R 22,000 IER
800
240A
6
5
1
AFD 32-2-2
54
250
150
F-36-2-2
P-32-5-2
EMERGENCY DISTRIBUTION SWITCHBOARD 3 E H M 1 D 4 B , 8 0 0 A , 4 8 0 V, 3 Ø , 3 W + G , 6 5 , 0 0 0 I E R
300A
■
125
C-26-1-1
240A
S PA R E 3
AFD 32-2-4
600
EMERGENCY DISTRIBUTION SWITCHBOARD 3 E H M 1 D 4 D , 6 0 0 A , 4 8 0 V, 3 Ø , 3 W + G , 6 5 , 0 0 0 I E R
240A
240A
S PA R E
240A
8
7
1
AFD 32-2-8
150
125
125
EF-32-2-2
EF-32-2-4
EF-32-2-8
240A
S PA R E 3
AFD 32-2-10
125
EF-32-2-10
S PA R E
55
■
H
H
F
H
01 58
F
D
S
01 50
F
F
F
D
F
F
02 06
S
01 42
RT S
S
01 35
F
F
S
01 51
S
01 41
S
01 36
H
01 61
F
F F
BUILDING 7
14GA 2C (A/V CIRCUIT #3)
F
14GA 2C (A/V CIRCUIT #4)
F
D
16GA 5C
16GA 1PR TWISTED
GROUND FLOOR
F
EOL
S
S
S
F
01 49
01 48
01 47
EOL
S
S
S
S
RT S
01 43
01 44
RT S
D
RT S
S
01 34
01 45
RT S
S
01 33
16GA 1PR TWISTED
H
H
F
01 60
01 59
01 46
16GA 5C
RT S
S
S
D
01 32
01 31
ABOVE CEILING
F
01 57
01 56
BUILDING 7
D
F
D
S
01 39
F
F
16GA 5C
RT S
F. A . C . P.
1 1 5 V. A . C .
3C
14GA 2C (24V PWR)
14GA 3C
M
F
F
H F
F
D
S
S
S
F
F
F
F
F
BUILDING 5
F
S
16GA 2C
TS
S
S
S
F
D
F
S
F
EOL
D
H
H
S
S
F
F
F
L
L
HORN, STROBE CIR #3
S
S
F
S
GROUND FLOOR
16GA 2C
FS
S
F
F
ABOVE CEILING
H
H
16GA 1PR TWISTED
F
H
16GA 1PR TWISTED
H
F
H
14GA 2C (A/V CIRCUIT #2)
F
D
F
02 06
S
S
S
S
H
14GA 2C (A/V CIRCUIT #1)
S
D
01 02
F
S
S
F
D
S
S
01 01
S
S
S
S
F
H
16GA 1PR TWISTED
H
D
S
S
01 14
D
A
F
01 54
S
01 53
S
H
01 55
S
01 52
14GA 2C (24V PWR)
S
01 40
D
RT S
S
01 38
16GA 4C
RT S
S
01 37
16GA 1PR TWISTED
BUILDING 5
Fire Alarm Riser
D
F
E
A
F I R E A L A R M C O N T R O L PA N E L
FIRE ALARM MASTER BOX
F I R E A L A R M L I G H T O N LY
FIRE ALARM HORN WITH LIGHT
END-OF-LINE RESISTOR
R E M O T E T E S T S TAT I O N
DUCT MOUNTED SMOKE DETECTOR
TA M P E R S W I T C H
FLOW SWITCH
C O N T R O L R E L AY
I N T E R FA C E A D D R E S S A B L E M O D U L E (IAM)
A D D R E S S A B L E H E AT D E T E C T O R , R AT E - O F - R I S E & F I X E D T E M P E R A TURE ABOVE CEILING
SMOKE DETECTOR, PHOTOELECTOR T Y P E “ E ” I N D I C AT E S D E V I C E P R O G R A M M E D F O R E L E VAT O R A C T I O N
M A N U A L F I R E A L A R M S TAT I O N
S M O K E D E T. A B O V E C E I L I N G
H E AT D E T. B E L O W C E I L I N G
EOL HORN, STROBE CIR #4
NOTES: 1. ADDRESSES LISTED ON THIS RISER ARE P R E L I M I N A RY A N D T O B E U S E D F O R P L A N N I N G P U R P O S E S O N LY. A C T U A L A D D R E S S E D M U S T B E O B TA I N E D V I A T H E O P E R AT I N G F I R E A L A R M C O N T R O L PA N E L .
FA C P
M
L
F
EOL
RT S
S
TS
FS
CR
I
H
S
F
S
H
LEGEND
Annex C: Reference Standards
This annex includes standards referenced this publication, as well as other electrical symbol references that are not specifically referred to in NECA 100. . American Institute of Architects (AIA) 1735 New York Avenue, NW Washington, DC 20006 (202) 626-7300 (202) 626-7587 fax www.aiaonline.com CAD Layer Guidelines American Society for Testing and Materials (ASTM) 100 Barr Harbor Drive West Conshohocken, PA 19428-2959 (610) 832-9500 (610) 832-9555 fax www.astm.org ASTM F967-87 (R1995), Standard Practice for Security Engineer Symbols Institute of Electrical and Electronics Engineers (IEEE) 445 Hoes Lane PO Box 1331 Piscataway, NJ 08855-1331 (800) 678-4333 (732) 981-9667 fax www.ieee.org ANSI/IEEE 91-1991, Standard Graphic Symbols for Logic Functions ANSI/IEEE 280-1997, Letter Symbols for Quantities Used in Electrical Science and Electrical Engineering ANSI/IEEE 315-1975 (R1994), Standard Graphic Symbols for Electrical and Electronics Diagrams ANSI/IEEE 991-1986 (R1994), Standard for Logic Circuit Diagrams
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56
Symbols for Electrical Construction Drawings
NECA 100
Illuminating Engineering Society of North America (IESNA) 120 Wall Street, Floor 17 New York, NY 10005-4001 (212) 248-5000 (212) 248-5017 fax www.iesna.org ANSI/IESNA DG-3-1994 (R2000), Application of Luminaire Symbols on Lighting Design Drawings National Fire Protection Association (NFPA) P.O. Box 9101 One Batterymarch Park Quincy, MA 02269-9101 (617) 770-3000 (617) 770-3500 fax www.nfpa.org NFPA 70-2005, National Electrical Code (ANSI) NFPA 170-2006, Fire Safety Symbols (ANSI) Security Industry Association (SIA) 635 Slaters Lane, Suite 110 Alexandria, VA 22314 (703) 683-2075 (703) 683-2469 fax www.siaonline.org Architectural Graphics Standard—CAP Security Symbols Release 2.0 Current NEIS Published by NECA: National Electrical Contractors Association 3 Bethesda Metro Center, Suite 1100 Bethesda, MD 20814 (301) 657-3110 tel (301) 215-4500 fax www.neca-neis.org NECA 1-2006, Standard for Good Workmanship in Electrical Contracting (ANSI) NECA 90-2004, Recommended Practice for Commissioning Building Electrical Systems (ANSI) NECA 100-2006, Symbols for Electrical Construction Drawings (ANSI) NECA 101-2006, Standard for Installing Steel Conduits (Rigid, IMC, EMT) NECA 102-2004, Standard for Installing Aluminum Rigid Metal Conduit (ANSI)
57
■
NECA 100
Symbols for Electrical Construction Drawings
NECA/AA 104-2006, Recommended Practice for Installing Aluminum Building Wire and Cable (ANSI) NECA/NEMA 105-2002, Recommended Practice for Installing Metal Cable Tray Systems (ANSI) NECA 111-2003, Standard for Installing Nonmetallic Raceways (RNC, ENT, LFNC) (ANSI) NECA/NACMA 120-2006, Standard for Installing Armored Cable (AC) and Metal-Clad Cable (MC) (ANSI) NECA 200-2002, Recommended Practice for Installing and Maintaining Temporary Electrical Power at Construction Sites (ANSI) NECA 202-2006, Standard for Installing and Maintaining Industrial Heat Tracing Systems (ANSI) NECA 230-2003, Standard for Selecting, Installing, and Maintaining Electric Motors and Motor Controllers (ANSI) NECA/FOA 301-2004, Standard for Installing and Testing Fiber Optic Cables (ANSI) NECA 303-2005, Standard for Installing Closed-Circuit Television (CCTV) Systems (ANSI) NECA 305-2001, Standard for Fire Alarm System Job Practices (ANSI) NECA 331-2004, Standard for Building and Service Entrance Grounding and Bonding NECA 400-1998, Standard for Installing and Maintaining Switchboards (ANSI) NECA 402-2001, Recommended Practice for Installing and Maintaining Motor Control Centers (ANSI) NECA/EGSA 404-2000, Recommended Practice for Installing Generator Sets (ANSI) NECA 405-2001, Recommended Practice for Installing and Commissioning Interconnected Generation Systems (ANSI) NECA 406-2003, Standard for Installing Residential Generator Sets (ANSI) NECA 407-2002, Recommended Practice for Installing and Maintaining Panelboards (ANSI) NECA 408-2002, Recommended Practice for Installing and Maintaining Busways (ANSI) NECA 409-2002, Recommended Practice for Installing and Maintaining Dry-Type Transformers (ANSI) NECA 410-2005, Standard for Installing and Maintaining Liquid-Filled Transformers (ANSI) NECA/IESNA 500-2006, Recommended Practice for Installing Indoor Commercial Lighting Systems (ANSI) NECA/IESNA 501-2006, Standard for Installing Exterior Lighting Systems (ANSI) NECA/IESNA 502-2006, Standard for Installing Industrial Lighting Systems (ANSI) NECA 503-2005, Standard for Installing Fiber Optic Lighting Systems NECA/BICSI 568-2006, Standard for Installing Commercial Building Telecommunications Cabling (ANSI) NECA/MACSCB 600-2003, Recommended Practice for Installing and Maintaining Medium-Voltage Cable (ANSI) NECA/NEMA 605-2005, Recommended Practice for Installing Underground Nonmetallic Utility Duct (ANSI)
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58
N A T I O N A L
E L E C T R I C A L
National Electrical Contractors Association 3 Bethesda Metro Center Suite 1100 Bethesda, MD 20814 301-657-3110 fax: 301-215-4500 www.neca-neis.org Codes & Standards Index: NECA 100 (R-06) 2K/11-06
I N S T A L L A T I O N
S T A N D A R D S
