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 i This page intentionally left blank RAY C MULLIN AND PHIL SIMMONS Australia Canada Mexico Singapore 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, contact us at Professional Group Cengage Learning Customer & Sales Support, 1-800-354-9706 For permission to use material from this text or product, submit all requests online at cengage.com/permissions Further permissions questions can be e-mailed to permissionrequest@cengage.com Production Manager: Mark Bernard Content Project Manager: Barbara LeFleur Library of Congress Control Number: 2010930585 Senior Art Director: David Arsenault ISBN-13: 978-1-4354-9829-7 Technology Project Manager: Christopher Catalina ISBN-10: 1-4354-9829-1 Cover Images: Electronic schematic: © 2011 iStockphoto/ Shane White Lightbulb illustration: © 2011 Joseph Villanova Light wall: © Paul Prescott/Shutterstock Delmar Maxwell Drive Clifton Park, NY 12065-2919 USA Cengage Learning is a leading provider of customized learning solutions with office locations around the globe, including Singapore, the United Kingdom, Australia, Mexico, Brazil and Japan Locate your local office at: international cengage.com/region 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 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 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 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 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 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: A3 EX L SITE PLAN EXTERIOR LIGHTING ELEC SERVICE WEST ELEVATION 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: A4 EXTERIOR LIGHTING NORTH ELEVATION 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: A5 INSURANCE OFFICE HALL OWNER INSURANCE OFFICE DRUGSTORE WOMEN HALL BEAUTY SALON BAKERY CRO DRUGSTORE STORAGE 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: A6 AIR HANDLER B3 W.H B3 B28-32 B27-31 B B-EM 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 B PANELBOARD O3 S O1 B-EM O11 I3 SS OWNER STORAGE E-EM HALL S AUTOMATIC TRANSFER SWITCH A- S S4 UTILITY SINK A S3 SPACE HEATER 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 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: 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 C UP 16R E 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’ 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 F 5 F F E S 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: 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 Gc Gb 4, 6,8 SECOND FLOOR PLAN 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: E3 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: E4 [...]... also provides plan review of electrical construction documents He has consulted on several lawsuits concerning electrical shocks, burn injuries, and electrocutions Mr Simmons is the co-author and 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 by Delmar,... requirements set 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 clearly explains the NEC changes that relate to typical commercial wiring The National Electrical Code is used as the basic standard for the layout and construction of electrical systems To gain the... Cross-Sections Basement Electrical Plan First Floor Electrical Plan Second Floor Electrical Plan Panelboard & Service Schedules: One-Line Diagram Preface INTENDED USE AND LEVEL Electrical Wiring Commercial is intended for use in commercial wiring courses at two-year and four-year colleges, as well as in apprenticeship training programs The text provides the basics of commercial wiring by offering insight... the National Electrical Code Then, if the reader and/or the instructor wish to back off from this level, based upon installation requirements, it can be done intelligently including explanations of the wiring applications Revisions to the NEC between the 2008 and 2011 editions are carefully identified • NEW TO THIS EDITION Every Code reference in the fourteenth edition of Electrical Wiring Commercial. .. Grounding of Electrical Systems (five editions), Analysis of the NEC (three editions), and Electrical Systems in One- and Two-Family Dwellings (three editions) Phil wrote and illustrated the National Electrical Installation Standard (NEIS) on Standard on Types AC and MC Cables for the National Electrical Contractors Association Phil presently serves NFPA on Code Making Panel-5 of the National Electrical. .. Building Plans and Specifications INTRODUCTION TO ELECTRICAL WIRING COMMERCIAL You are about to explore the electrical systems of a typical small commercial building You may find this text to be challenging depending on your experience and understanding in installing electrical equipment and wiring, along with the many requirements in the National Electrical Code® (NEC) This text and the NEC may seem... 1995 Phil is a retired member of the International Brotherhood of Electrical Workers IMPORTANT NOTE Most all of the work in updating this edition of Electrical Wiring Commercial was completed after all normal steps of revising the National Electrical Code NFPA 70 were taken but before the actual issuance and publication of the 2011 edition of the NEC Every effort has been made to be technically correct,... Without skipping a beat, Ray welcomes Phil Simmons to this edition and future editions of Electrical Wiring Commercial Phil has an outstanding background in the National Electrical Code He is recognized as one of the country’s top Code instructors Read more about Phil in the “About the Authors” section in the front material of this text CHAPTER Commercial Building Plans and Specifications 1 OBJECTIVES... that what is covered is what electricians need to know • Emphasis is given to making the wiring of the Commercial Building conform to energy saving Standards In other words, the wiring and connected loads in Electrical Wiring Commercial are “Green.” • One of the most far-reaching new requirements in the 2011 National Electrical Code is that the grounded circuit conductor must be either brought to every... completing this text you will have wired a commercial building Throughout this text, red triangles indicate a change in the 2011 edition of the NEC from the previous 2008 edition Let us begin with probably the most important part of learning the electrical trade: safety SAFETY IN THE WORKPLACE Before we get started on our venture into the wiring of a typical commercial building, let us talk about safety ... 2010930585 Senior Art Director: David Arsenault ISBN-13: 97 8-1 -4 35 4-9 82 9-7 Technology Project Manager: Christopher Catalina ISBN-10: 1-4 35 4-9 82 9-1 Cover Images: Electronic schematic: © 2011 iStockphoto/... Cross-Sections Basement Electrical Plan First Floor Electrical Plan Second Floor Electrical Plan Panelboard & Service Schedules: One-Line Diagram Preface INTENDED USE AND LEVEL Electrical Wiring Commercial. .. writing to International Association of Electrical Inspectors 901 Waterfall Way, Suite 602 Richardson, TX 7508 0-7 702 80 0-7 8 6-4 234, 97 2-2 3 5-1 455 Fax: 97 2-2 3 5-6 858 http://www.iaei.org Illuminating