www.EngineeringBooksPDF.com ELECTRICAL WIRING COMMERCIAL Based on the 2014 National Electrical Code® 15 TH EDITION i www.EngineeringBooksPDF.com www.EngineeringBooksPDF.com ELECTRICAL WIRING COMMERCIAL Based on the 2014 National Electrical Code® 15 TH EDITION PHIL SIMMONS RAY C MULLIN Australia • Canada • Mexico • Singapore • Spain • United Kingdom • United States www.EngineeringBooksPDF.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.EngineeringBooksPDF.com Electrical Wiring Commercial, 15th Edition Phil Simmons, Ray C Mullin Vice President, GM Skills & Product Planning: Dawn Gerrain Product Team Manager: James DeVoe Senior Director, Development: Marah Bellegarde Senior Product Development Manager: Larry Main © 2015, 2012 Cengage Learning WCN: 02-200-203 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 Content Developer: John Fisher For product information and technology assistance, contact us at Cengage Learning Customer & Sales Support, 1-800-354-9706 Product 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www.cengage.com/global Cengage Learning products are represented in Canada by Nelson Education, Ltd To learn more about Cengage Learning, visit www.cengage.com Purchase any of our products at your local college store or at our preferred online store www.cengagebrain.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 18 17 16 15 14 www.EngineeringBooksPDF.com Contents Preface xiii Acknowledgments xix CHAPTER Commercial Building Plans and Specifications CHAPTER Reading Electrical Working Drawings—Entry Level 35 CHAPTER Calculating the Electrical Load 49 Objectives Introduction to Electrical Wiring—Commercial Safety in the Workplace Commercial Building Specifications Working Drawings 10 Codes and Organizations 16 NEC Arrangement 18 Language Conventions 18 Defined Terms 20 Abandoned Cables 28 Metrics (si) and the NEC 28 Summary 31 Review 32 Objectives 35 Introduction 36 Electrical Symbols 36 The Drugstore 45 The Bakery 46 Review 46 Objectives Introduction The Electrical Load Energy Code Considerations Lighting Loading Calculations 49 50 51 52 52 v www.EngineeringBooksPDF.com vi Other Loads Motors and Appliances Summary of Drugstore Loads Review CHAPTER 54 55 57 59 Branch Circuits 61 CHAPTER Switches and Receptacles 88 CHAPTER Wiring Methods 118 Objectives Conductor Selection Determining Circuit Components Defining the Branch Circuits Application of Procedure Using the Panelboard Branch-Circuit Worksheet Review 61 62 77 80 83 84 86 Objectives 88 Introduction 89 Receptacles 89 Snap Switches 100 Conductor Color Coding 102 Occupancy Sensors 110 Neutral at the Switch Location 110 Switch and Receptacle Covers 111 Review 113 Objectives 118 Introduction 119 Raceway Sizing in the NEC 119 Rigid Metal Conduit (Rmc) 120 Intermediate Metal Conduit (Imc) 121 Electrical Metallic Tubing (Emt) 122 Raceway Seals 124 Flexible Connections 125 Armored (Type Ac) and Metal-Clad (Type Mc) Cables 129 Rigid Polyvinyl Chloride Conduit (Pvc) (Nec Article 352) 132 Electrical Nonmetallic Tubing (Ent) (Nec Article 362) 133 Raceway Sizing 134 Raceway Support 141 Special Considerations 143 www.EngineeringBooksPDF.com C0NTENTS vii Box Styles and Sizing 144 Selecting the Correct Size Box 149 Review 155 CHAPTER CHAPTER CHAPTER CHAPTER 10 Motor and Appliance Circuits 159 Objectives 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 Appliances Appliance Disconnecting Means Grounding Overcurrent Protection The Bakery Equipment Review 159 160 178 179 180 181 184 186 188 188 188 191 Feeders 195 Objectives Feeder Requirements Feeder Component Selection Panelboard Worksheet, Schedule, and Load Calculation Feeder Ampacity Determination, Drugstore Review 195 196 199 208 208 212 Special Systems 215 Objectives Introduction Surface Metal Raceways Multioutlet Assemblies Communications Systems Floor Outlets Fire Alarm System Review 215 216 216 216 218 221 223 226 Working Drawings—Upper Level 227 Objectives 227 Introduction 228 Insurance Office 228 www.EngineeringBooksPDF.com viii Beauty Salon Real Estate Office Toilet Rooms Review CHAPTER 229 232 232 232 11 Special Circuits (Owner’s Circuits) 235 CHAPTER 12 Panelboard Selection and Installation 246 CHAPTER The Electric Service 263 13 Objectives Introduction Panelboard Worksheet, Panelboard Schedule, and Load Calculation Form Lighting Circuits Sump Pump Control Water Heaters and Space Heating Elevator Wiring Optional Electric Boiler Review Objectives Introduction Panelboards Working Space Around Electrical Equipment Summary Review Objectives Introduction Transformers Transformer Overcurrent Protection Transformer Connections Utility Supply Metering Important Definitions Service-Entrance Equipment Grounding/Bonding Ground Fault Protection of Equipment Safety in the Workplace Review www.EngineeringBooksPDF.com 235 236 236 236 238 239 240 240 244 246 247 247 254 261 261 263 264 264 265 265 269 272 273 275 286 302 305 306 .. .ELECTRICAL WIRING COMMERCIAL Based on the 2014 National Electrical Code® 15 TH EDITION i www.EngineeringBooksPDF.com www.EngineeringBooksPDF.com ELECTRICAL WIRING COMMERCIAL Based... illustrator of Electrical Wiring? ??Residential (17th edition) and Electrical Wiring? ? ?Commercial (14th edition) and author and illustrator of Electrical Grounding www.EngineeringBooksPDF.com PREFACE While... forth by the National Electrical Code® SUBJECT AND APPROACH The fifteenth edition of Electrical Wiring? ? ?Commercial is based on the 2014 National Electrical Code This new edition thoroughly and