Symbols for Electrical Construction Drawings

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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

i ■



■ ii

(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.

iii ■



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.

1 ■

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

5 ■

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.

7



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

■ 8

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

9 ■

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.)

11 ■

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

13 ■

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



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)



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

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