www.EngineeringEBooksPdf.com This is an electronic version of the print textbook Due to electronic rights restrictions, some third party content may be suppressed Editorial review has deemed that any suppressed content does not materially affect the overall learning experience The publisher reserves the right to remove content from this title at any time if subsequent rights restrictions require it For valuable information on pricing, previous editions, changes to current editions, and alternate formats, please visit www.cengage.com/highered to search by ISBN#, author, title, or keyword for materials in your areas of interest www.EngineeringEBooksPdf.com i www.EngineeringEBooksPdf.com This page intentionally left blank www.EngineeringEBooksPdf.com RAY C MULLIN AND PHIL SIMMONS Australia Canada Mexico Singapore www.EngineeringEBooksPdf.com Spain United Kingdom United States Electrical Wiring, Commercial, 14th Edition Ray C Mullin, Phil Simmons Vice President, Career and Professional Editorial: Dave Garza Director of Learning Solutions: Sandy Clark Acquisitions Editor: Stacy Masucci Managing Editor: Larry Main © 2012, 2008 Delmar, Cengage Learning ALL RIGHTS RESERVED No part of this work covered by the copyright herein may be reproduced, transmitted, stored, or used in any form or by any means graphic, electronic, or mechanical, including but not limited to photocopying, recording, scanning, digitizing, taping, Web distribution, information networks, or information storage and retrieval systems, except as permitted under Section 107 or 108 of the 1976 United States Copyright Act, without the prior written permission of the publisher Senior Product Manager: John Fisher Editorial Assistant: Andrea Timpano Vice President, Career and Professional Marketing: Jennifer Baker Marketing Director: Deborah Yarnell Marketing Manager: Kathryn Hall Associate Marketing Manager: Scott A Chrysler Production Director: Wendy Troeger For product information and technology assistance, 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Cengage Learning products are represented in Canada by Nelson Education, Ltd For your lifelong learning solutions, visit delmar.cengage.com Visit our corporate website at cengage.com Notice to the Reader Publisher does not warrant or guarantee any of the products described herein or perform any independent analysis in connection with any of the product information contained herein Publisher does not assume, and expressly disclaims, any obligation to obtain and include information other than that provided to it by the manufacturer The reader is expressly warned to consider and adopt all safety precautions that might be indicated by the activities described herein and to avoid all potential hazards By following the instructions contained herein, the reader willingly assumes all risks in connection with such instructions The publisher makes no representations or warranties of any kind, including but not limited to, the warranties of fitness for particular purpose or merchantability, nor are any such representations implied with respect to the material set forth herein, and the publisher takes no responsibility with respect to such material The publisher shall not be liable for any special, consequential, or exemplary damages resulting, in whole or part, from the readers’ use of, or reliance upon, this material Printed in the United States of America XX 11 10 09 www.EngineeringEBooksPdf.com Contents Preface xiii Acknowledgments xix CHAPTER CHAPTER CHAPTER Commercial Building Plans and Specifications Objectives Introduction to Electrical Wiring—Commercial Safety in the Workplace Commercial Building Specifications Working Drawings 10 Codes and Organizations 15 NEC Arrangement 16 Language Conventions 17 Defined Terms 18 Abandoned Cables 25 Metrics (SI) and the NEC 26 Summary 30 Review 30 Reading Electrical Working Drawings—Entry Level 33 Objectives Electrical Symbols The Drugstore The Bakery Review 33 34 43 44 44 Calculating the Electrical Load 47 Objectives Introduction The Electrical Load Energy Code Considerations Lighting Loading Calculations 47 48 49 50 50 v www.EngineeringEBooksPdf.com vi Other Loads Motors and Appliances Summary of Drugstore Loads Review CHAPTER CHAPTER CHAPTER 52 53 55 57 Branch Circuits 59 Objectives Conductor Selection Determining Circuit Components Defining the Branch Circuits Application of Procedure Using the Panelboard Worksheet Review 59 60 75 79 81 81 84 Switches and Receptacles 86 Objectives 86 Receptacles 87 Snap Switches 98 Conductor Color Coding 100 Occupancy Sensors 108 Switch and Receptacle Covers 108 Review 110 Wiring Methods 115 Objectives Raceway Sizing in the NEC Rigid Metal Conduit (RMC) Intermediate Metal Conduit (IMC) Electrical Metallic Tubing (EMT) Raceway Seals Flexible Connections Armored (Type AC) and Metal-Clad (Type MC) Cables Rigid Polyvinyl Chloride Conduit (PVC) Electrical Nonmetallic Tubing (ENT) Raceway Sizing Raceway Support Special Considerations Box Styles and Sizing Selecting the Correct Size Box Review www.EngineeringEBooksPdf.com 115 116 117 118 119 121 121 125 128 129 131 136 138 140 145 151 C0NTENTS CHAPTER CHAPTER CHAPTER CHAPTER 10 vii Motor and Appliance Circuits 155 Objectives Appliances The Basics of Motor Circuits Motor Branch-Circuit, Short-Circuit, and Ground-Fault Protection Motor-Starting Currents/Code Letters Type and Type Coordination Equipment Installation Appliance Disconnecting Means Grounding Overcurrent Protection The Bakery Equipment Review 155 156 158 176 177 178 179 183 183 183 183 187 Feeders 191 Objectives 191 Feeder Requirements 192 Feeder Component Selection 195 Panelboard Worksheet, Schedule, and Load Calculation 204 Feeder Ampacity Determination, Drugstore 204 Review 208 Special Systems 211 Objectives Surface Metal Raceways Multioutlet Assemblies Communications Systems Floor Outlets Fire Alarm System Review 211 212 212 215 217 219 222 Working Drawings—Upper Level 223 Objectives Insurance Office Beauty Salon Real Estate Office Toilet Rooms Review www.EngineeringEBooksPdf.com 223 224 225 228 228 228 viii CHAPTER 11 CHAPTER 12 CHAPTER 13 CHAPTER 14 Special Circuits (Owner’s Circuits) 231 Objectives Panelboard Worksheet, Panelboard Schedule, and Load Calculation Form Lighting Circuits Sump Pump Control Water Heater and Space Heating Elevator Wiring Optional Electric Boiler Review 231 232 232 233 234 235 236 240 Panelboard Selection and Installation 242 Objectives Panelboards Working Space Around Electrical Equipment Summary Review 242 243 251 256 256 The Electric Service 258 Objectives Transformers Transformer Overcurrent Protection Transformer Connections Utility Supply Metering Important Definitions Service-Entrance Equipment Grounding/Bonding Ground Fault Protection for Equipment Safety in the Workplace Review 258 259 260 260 264 268 269 271 282 296 300 302 Lamps and Ballasts for Lighting 305 Objectives Lighting Terminology Lumens Per Watt (lm/W) Incandescent Lamps Low-Voltage Incandescent Lamps Fluorescent Lamps www.EngineeringEBooksPdf.com 305 306 307 308 312 314 REAL ESTATE OFFICE RM REAL ESTATE OFFICE RM ELEVATOR HALL STORAGE ROOM MEN A A-6 H.C INSURANCE OFFICE RM E RM SECOND FLOOR PLAN 02/17/10 INTERIOR WALLS REVISED, ELEVATOR ADDED NO DATE REVISION P.S BY SCALE: 1/4” = 1’-0” DRAWN BY: P SIMMONS CHECKED BY: R MULLIN SHEET: OF 10 DRAWING: www.EngineeringEBooksPdf.com A3 EX L SITE PLAN EXTERIOR LIGHTING ELEC SERVICE WEST ELEVATION www.EngineeringEBooksPdf.com XTERIOR LIGHTING EAST ELEVATION SITE PLAN EAST & WEST ELEVATIONS 02/17/10 NO DATE ELEC SERVICE ADDED, & FACADE RESTYLED REVISION P.S BY SCALE: AS NOTED DRAWN BY: P SIMMONS CHECKED BY: R MULLIN SHEET: OF 10 DRAWING: www.EngineeringEBooksPdf.com A4 EXTERIOR LIGHTING NORTH ELEVATION www.EngineeringEBooksPdf.com EXTERIOR LIGHTING SOUTH ELEVATION NORTH & SOUTH ELEVATIONS 02/17/10 NO DATE ELEC SERVICE ADDED, & FACADE RESTYLED REVISION P.S BY SCALE: 3/16” = 1’-0” DRAWN BY: P SIMMONS CHECKED BY: R MULLIN SHEET: OF 10 DRAWING: www.EngineeringEBooksPdf.com A5 INSURANCE OFFICE HALL OWNER INSURANCE OFFICE WOMEN DRUGSTORE HALL BEAUTY SALON BAKERY CRO DRUGSTORE STORAGE www.EngineeringEBooksPdf.com BAKERY STORAGE WOMEN MEN INSURANCE OFFICE DRUGSTORE DRUGSTORE STORAGE CROSS SECTION A-A SS SECTION B-B BUILDING CROSS SECTIONS 02/17/10 NO DATE INTERIOR REVISED PER PLAN CHANGES P.S REVISION BY SCALE: 3/16” = 1’-0” DRAWN BY: P SIMMONS CHECKED BY: R MULLIN SHEET: OF 10 DRAWING: www.EngineeringEBooksPdf.com A6 AIR HANDLER B3 W.H B3 B28-32 B27-31 B-EM B B BAKERY STORAGE B3 S S B28-32 B B B-EM FIRE ALARM CONTROL PANEL ABOVE TELEPHONE EQUIPMENT BELOW SPACE HEATER B33-37 SS B3 B3 F B2 W.H UP 14R A-EM O12-16 O3 SS OWNER STORAGE S B PANELBOARD A- S S4 UTILITY SINK A S3 E-EM HALL S AUTOMATIC TRANSFER SWITCH O1 B-EM O11 SPACE HEATER I3 SUMP PUMP S I3 DS4 F DS9 B-EM DS19-23 S I17-21 AIR HANDLER S B B-EM B DS13-17 B INSURANCE OFFICE STORAGE I3 I3 BASEMENT FLOOR PLAN www.EngineeringEBooksPdf.com W.H DS9 BS3 W.H BS12-16 B3 BEAUTY SALON STORAGE B-EM BS3 B-EM B S BS3 BS4 BS18-22 S BS3 S O3 S3 HALL B3 B SPACE HEATER B-EM ELEVATOR B-EM S F DS9 HALL EM A S O3 B F DS9 DS9 SPACE HEATER DS20-24 B B-EM B DS9 DRUGSTORE STORAGE S S B-EM B B-EM DS9 DS9 BASEMENT ELECTRICAL PLAN 02/17/10 NEW ELECTRICL PLAN NO DATE REVISION P.S BY SCALE: 1/4” = 1’-0” DRAWN BY: CHECKED BY: P SIMMONS R MULLIN SHEET: OF 10 DRAWING: www.EngineeringEBooksPdf.com E1 B7 E S TOILET WP GFCI S B21-25 B7 B15-19 C S C W S F C S S BAKERY (KITCHEN) S4 F C-EM C C C-EM S S E-EM C ALL 125-VOLT, 15- OR 20-AMPER RECEPTACLES IN THIS ROOM S GFCI PROTECTION PANELBOARD F C UP 16R E C B16-20 HALL S F S3 DN 14R S E E O2 S F F S RCM a LVP PANELBOARD b LVP Ga Gb Gc S Gb G-EM c Gb LVP E-EM RC RC GFCI N FIRST FLOOR PLAN SUPPLY TELEPHONE AND RECEPTACLE OUTLET THROUGH FLOOR SIGN OUTLET ELEVATION: 218.00’ www.EngineeringEBooksPdf.com b c E GFCI N STORAGE 10 COPIER K NOTES TO DRAWING E2 a IG S S S RC TOILET c Gc LVP b RC Ga a S G-EM a K MENTVICE EQUIPSER S E c LVP RCa B9 C 6 K K E B10-14 EXHAUST FAN OUTL LOCATE 1’ BELOW C B22-26 AC WP GFCI DS8 AC DS14-18 LET CEILING K 4 T -13 T P P S S Q SIGN OUTLET B8 BAKERY (STORE) S S C T F S C F K T S P C P T T IG C-EM RE, 1-PHASE SHALL HAVE T 4 ELEVATOR C C HALL E-EM C 6 F 5 F F E S F SRCa DS11 E-EM a b c a b DOOR OPERATOR c E O2 DRUGSTORE Q LVP S a b S c a b c E2 IG E2 IG Q a b c a b c K E2 K SIGN OUTLET 12 FIRST FLOOR ELECTRICAL PLAN 02/17/10 NEW ELECTRICAL PLAN NO DATE REVISION P.S BY SCALE: 1/4” = 1’-0” DRAWN BY: CHECKED BY: P SIMMONS R MULLIN SHEET: OF 10 DRAWING: www.EngineeringEBooksPdf.com E2 S S GFCI E E GFCI E F E E F F E S GFCI E F E E S S Q BEAUTY SALON 10 E E E F E 10 SS S E F S 11-13 F-EM S E W/D F DN 16R O2 H F-EM F O18 F PANELBOARD 16 WOMEN GFCI G S E-EM GFCI E O7-9 WH SPACE HEATER O5 N S 5-7 O S 14 G S OC O2 E Gc Ga Gb F F 12 12 F Q 12 Gb Gc 4, 6,8 SECOND FLOOR PLAN www.EngineeringEBooksPdf.com INSURANCE OFFICE RM S Ga Gc Ga E2 E2 E2 E2-EM E2 REAL ESTATE OFFICE RM REAL ESTATE OFFICE RM S S S E2 E2 E2 F F E2 E2-EM GFCI S N S BRANCH-CIRCUIT PANELBOARD O13-17 O18 S HALL O19-23 ELEVATOR S F-EM F E2-EM ELEVATOR CONTROLS STORAGE PANELBOARD E S MEN S O8-10 SPACE HEATER 15 E-EM E GFCI E-EM O6 15 N E E S F E S E E E-EM Ga 15 15 Sa Sb Sc F S 15 S S OC IG 11 IG 13 15 SS Gb IG G S G-EM G INSURANCE OFFICE RM F SECOND FLOOR ELECTRICAL PLAN 02/17/10 NEW ELECTRICAL PLAN NO DATE REVISION P.S BY SCALE: 1/4” = 1’-0” DRAWN BY: CHECKED BY: P SIMMONS R MULLIN SHEET: OF 10 DRAWING: www.EngineeringEBooksPdf.com E3 www.EngineeringEBooksPdf.com Drugstore 24 Beauty Salon Insurance Office Bakery Elevator Elevator Real Estate Office Drugstore Control Equipment 10 208Y/120 V Utility Transformer 200/ 200 M 400/ 300 M 11 200/ 150 M 40 30 Owner 1000-A Termination Box M M Automatic Transfer Switch M All conductors copper with THHN/THWN insulation 200/ 150 100/ 100 200/ 150 70 G - Service: (3) Trade size 2-1/2 PVC (Metric Designator 63) with three 350 kcmil and one 1/0 AWG - Beauty Salon: Trade size EMT (Metric Designator 53) with three 3/0 AWG and one AWG - Bakery: Trade size 2-1/2 EMT (Metric Designator 63) with three 300 kcmil and one AWG - Insurance Office: Trade size 1-1/2 EMT (Metric Designator 41) with three 1/0 AWG and one AWG - Drugstore: Trade size 1-1/2 EMT (Metric Designator 41) with three 1/0 AWG and one AWG - Real Estate Office: Trade size EMT (Metric Designator 27) with three AWG and one AWG - Owner: Trade size 1-1/2 EMT (Metric Designator 41) with three 1/0 AWG and one AWG - Grounding electrode conductor 2/0 AWG to metal water pipe with AWG jumper to concrete encased grounding electrode - Feeder to transfer equipment: Trade size 1-1/4 EMT (Metric Designator 35) with four AWG 10 - Feeder to elevator control panel: Trade size 3/4 EMT (Metric Designator 21) with three AWG 11 - Feeder to elevator equipment panelboard: Trade size 3/4 EMT (Metric Designator 21) with four 10 AWG ONE-LINE DIAGRAM OF SERVICE & FEEDERS PANELBOARD & SERVICE SCHEDULES, ONE-LINE DIAG 02/17/10 NEW SCHEDULES & ONE-LINE DIAGRAM NO DATE REVISION P.S BY SCALE: 1/4” = 1’-0” DRAWN BY: P SIMMONS CHECKED BY: R MULLIN SHEET: 10 OF 10 DRAWING: www.EngineeringEBooksPdf.com E4 ... illustrator of Electrical Wiring? ??Residential (17th edition) and Electrical Wiring? ? ?Commercial (14th edition) and author and illustrator of Electrical Grounding and Bonding (3rd edition) , all published... forth by the National Electrical Code SUBJECT AND APPROACH The fourteenth edition of Electrical Wiring? ? ?Commercial is based on the 2011 National Electrical Code.* This new edition thoroughly and... www.EngineeringEBooksPdf.com CHAPTER Commercial Building Plans and Specifications INTRODUCTION TO ELECTRICAL WIRING? ?? COMMERCIAL You are about to explore the electrical systems of a typical small commercial