Electrician s Exam Mike Holt Enterprises

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MIKE HOLT S ILLUSTRATED GUIDE,Electrician s Exam,Preparation. Electrical Fundamentals,National Electrical Code,NEC Calculations. Contains 2 400 Practice Questions,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 herein and to avoid all potential. hazards By following the instructions contained herein the reader willingly assumes all risks in connections with such instructions. The publisher makes no representation 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. Cover Design Paul Wright wright ispchannel com, Design Layout and Typesetting Paul Wright wright ispchannel com.
Graphic Illustrations Mike Culbreath,5th printing April 2001. COPYRIGHT 1999 Charles Michael Holt Sr,Printed in the United States of America. For more information contact,Mike Holt Enterprises Inc. 7310 West McNab Road,Tamarac Florida 33321, All rights reserved No part of this work covered by the copyright hereon may be reproduced or used in any form or by any. means graphic electronic or mechanical including photocopying recording taping or information storage and retrieval. systems without the written permission of the publisher You can request permission to use material from this text phone 1 888. NEC CODE Sales mikeholt com www mikeholt com, NEC NFPA and National Electrical Code are registered trademarks of National Fire Protection Association.
This logo is a registered trademark of Mike Holt Enterprises Inc. Library of Congress Cataloging in Publication Data. Holt Charles Michael Master electrician s exam preparation electrical theory National Electrical Code NEC calculations. contains 2 400 practice questions Michael Holt Includes index 1 Electric engineering United States Examinations questions. etc 2 Electricians Licenses United States 3 Electric engineering Problems exercises etc. I dedicate this book to the Lord Jesus Christ,my mentor and teacher. Chapter 1 Unit 2 Electrical Circuits 40,Electrical Theory and. Part A Series Circuits 40,Code Questions 1,2 1 Understanding Series Calculations 41. Unit 1 Electrician s Math 2 2 Series Circuit Summary 44. and Basic Electrical Formulas 3,Part B Parallel Circuit 45. Part A Electrician s Math 3,2 3 Practical Uses of Parallel Circuits 45.
1 1 Fractions 3,2 4 Understanding Parallel Calculations 45. 1 2 Kilo 4,2 5 Parallel Circuit Resistance Calculations 47. 1 3 Knowing Your Answer 4,2 6 Parallel Circuit Summary 48. 1 4 Multiplier 5,Part C Series Parallel and,1 5 Parentheses 5 Multiwire Branch Circuits 49. 1 6 Percentages 5 2 7 Review of Series and Parallel Circuits 49. 1 7 Percent Increase 5 2 8 Series Parallel Circuit. Resistance Calculations 50,1 8 Percentage Reciprocals 6.
Part D Multiwire Branch Circuits 51,1 9 Rounding 6. 2 9 Neutral Current Calculations 51,1 10 Squaring 7. 2 10 Dangers of Multiwire Branch Circuit 54,1 11 Square Root 7. Unit 2 Questions 56,1 12 Transposing Formulas 8,Part B Basic Electrical Formulas 8. Unit 3 Understanding Alternating,1 13 Electrical Circuit 8 Current 75.
1 14 Electron Flow 9 Part A Alternating Current,Fundamentals 75. 1 15 Power Source 9,3 1 Current Flow 76,1 16 Conductance and Resistance 9. 3 2 Alternating Current 76,1 17 Electrical Circuit Values 10. 3 3 Alternating Current Generator 76,1 18 Ohm s Law I E R 10. 3 4 Waveform 77,1 19 Pie Circle Formula 12,3 5 Armature Turning Frequency 77.
1 20 Formula Wheel 13,3 6 Phase In and Out 78,1 21 Power Changes With The. Square of The Voltage 15 3 7 Phase Differences In Degrees 78. 1 22 Electric Meters 15 3 8 Values of Alternating Current 79. Unit 1 Questions 18 Part B Induction 80,3 9 Induced Voltage and Applied Current 80. 3 10 Conductor Impedance 81 Chapter 2,NEC Calculations and. 3 11 Induction and Conductor Shape 81,Code Questions 139. 3 12 Induction and Magnetic Cores 82, Part C Capacitance 83 Unit 5 Raceway Outlet Box and.
Junction Boxes Calculations 140,3 13 Charge Testing and Discharging 83. Part A Raceway Fill 140,3 14 Use of Capacitors 84,5 1 Understanding The National. Part D Power Factor and Efficiency 85,Electrical Code Chapter 9 140. 3 15 Apparent Power Volt Ampere 85,5 2 Raceway and Nipple Calculation 145. 3 16 Power Factor 86,5 3 Existing Raceway Calculation 147.
3 17 True Power Watts 87,5 4 Tips For Raceway Calculations 148. 3 18 Efficiency 88,Part B Outlet Box Fill Calculations 149. Unit 3 Questions 90,5 5 Sizing Box Conductors All The. Same Size Table 370 16 a 149, Unit 4 Motors and Transformers 107 5 6 Conductor Equivalents 370 16 b 149. Part A Motors 107 5 7 Sizing Box Different Size, 4 1 Motor Speed Control 108 Conductors 370 16 b 151.
4 2 Reversing A Direct Current Motor 108 Part C Pull Junction Boxes. And Conduit Bodies 153,4 3 Alternating Current Motors 108. 5 8 Pull and Junction Box Size Calculations 153,4 4 Reversing Alternating Current Motors 109. 5 9 Depth of Box and Conduit Body, 4 5 Motor Volt Ampere Calculations 109 Sizing 370 28 a 2 Exception 154. 4 6 Motor Horsepower Watts 110 5 10 Junction and Pull Box Sizing Tips 155. 4 7 Motor Nameplate Ampere 111 5 11 Pull Box Examples 155. Part B Transformer Basics 112 Unit 5 Questions 157. 4 8 Transformer Primary and Secondary 113, 4 9 Transformer Secondary and Unit 6 Conductor Sizing and Protection. Primary Voltage 113 Calculations 174, 4 10 Autotransformers 113 Part A General Conductor Requirements 174.
4 11 Transformer Power Losses 113 6 1 Conductor Insulation Property. Table 310 13 174,4 12 Transformer Turns Ratio 114,6 2 Conductor Allowable Ampacity 310 15 176. 4 13 Transformer Kva Rating 115,6 3 Conductor Sizing 110 6 177. 4 14 Transformer Current 115,6 4 Terminal Ratings 110 14 c 178. Unit 4 Questions 117, 6 5 Conductors In Parallel 310 4 180 7 10 Motor VA Calculations 219. 6 6 Conductor Size Voltage Drop 210 19 a Unit 7 Questions 221. FPN No 4 and 215 2 b FPN No 2 181, 6 7 Overcurrent Protection Article 240 181 Unit 8 Voltage Drop Calculations 237.
6 8 Overcurrent Protection of Conductors Part A Conductor Resistance. General Requirements 240 3 182 Calculations 237, 6 9 Overcurrent Protection of Conductors 8 1 Conductor Resistance 237. Specific Requirements 184,8 2 Conductor Resistance Direct Current. 6 10 Equipment Conductors Size and Circuits Chapter 9 Table 8 238. Protection Examples 185,8 3 Conductor Resistance Alternating. Part B Conductor Ampacity Current Circuits 239,Calculations 186. 8 4 Alternating Current Resistance As, 6 11 Conductor Ampacity 310 10 186 Compared To Direct Current 239.
6 12 Ambient Temperature Derating Factor 8 5 Resistance Alternating Current. Table 310 16 186 Chapter 9 Table 9 of The NEC 240, 6 13 Conductor Bundling Derating Factor Part B Voltage Drop Calculations 242. Table 310 15 b 2 188,8 6 Voltage Drop Considerations 242. 6 14 Ambient Temperature and Conductor, Bundling Derating Factors 189 8 7 NEC Voltage Drop Recommendations 242. 6 15 Current Carrying Conductors 189 8 8 Determining Circuit Conductors. Voltage Drop 243,6 16 Conductor Sizing Summary 192. 8 9 Sizing Conductors To Prevent,Unit 6 Questions 193 Excessive Voltage Drop 246.
8 10 Limiting Conductor Length To, Unit 7 Motor Calculations 209 Limit Voltage Drop 247. 7 1 Motor Branch Circuit Conductors 8 11 Limiting Current To Limit. 430 22 a 209 Voltage Drop 248, 7 2 Motor Overcurrent Protection 210 8 12 Extending Circuits 249. 7 3 Overload Protection 430 32 a 211 Unit 8 Questions 251. 7 4 Branch Circuit Short Circuit Ground Fault, Protection 430 52 c 1 212 Unit 9 Single Family Dwelling Unit Load. 7 5 Feeder Conductor Size 214,Calculations 267,Part A General Requirements 267. 7 6 Feeder Protection 430 62 a 215,9 1 General Requirements 267.
7 7 Highest Rated Motor 430 17 216,9 2 Voltages 220 2 a 267. 7 8 Motor Calculations Steps 216,9 3 Fraction of An Ampere 220 2 b 267. 7 9 Motor Calculation Review 218, 9 4 Appliance Small Circuits Unit 10 Questions 308. 220 11 c 1 268, 9 5 Cooking Equipment Branch Circuit Unit 11 Commercial Load Calculations 324. Table 220 19 Note 4 268,Part A General 324,9 6 Laundry Receptacle S Circuit.
220 11 c 2 271 11 1 General Requirements 324, 9 7 Lighting and Receptacles 271 11 2 Conductor Ampacity Article 100 324. Part B Standard Method Feeder Service 11 3 Conductor Overcurrent Protection. Load Calculations 273 240 3 325, 9 8 Dwelling Unit Feeder Service Load 11 4 Voltages 220 2 a 325. Calculations Part B of Article 220 273 11 5 Rounding and AMPERE 220 2 b 325. 9 9 Dwelling Unit Feeder Service Part B Loads 324,Calculations Examples 274. 11 6 Air Conditioning 325,Part C Optional Method Feeder Service. Load Calculations 278 11 7 Dryers 327, 9 10 Dwelling Unit Optional Feeder Service 11 8 Electric Heat 327.
Calculations 220 30 278,11 9 Kitchen Equipment 328. 9 11 Dwelling Unit Optional Calculation,11 10 Laundry Equipment 329. Examples 278,11 11 Lighting Demand Factors,9 12 Neutral Calculations General 220 22 281. Table 220 3 a and 220 11 330,Unit 9 Questions 282,11 12 Lighting Without Demand Factors. Table 220 3 a 215 2 and 230 42 330,Chapter 3 11 13 Lighting Miscellaneous 331.
Advanced NEC Calculations, And Code Questions 299 11 14 Multioutlet Receptacle Assembly. 220 3 b 8 331, Unit 10 Multifamily Dwelling Unit Load 11 15 Receptacles VA Load 220 13 332. Calculations 300 11 16 Banks and Offices General Lighting. 10 1 Multifamily Dwelling Unit Calculations And Receptacles 333. Standard Method 300 11 17 Signs 220 3 b 6 and 600 5 334. 10 2 Multifamily Dwelling Units Calculation 11 18 Neutral Calculations 220 22 334. Examples Standard Method 301,Part C Load Calculation Examples 335. 10 3 Multifamily Dwelling Units Calculation, Sample Standard Method 305 Part D Load Calculation Examples 340. 10 4 Multifamily Dwelling Unit Calculations Unit 11 Questions 345. 220 32 Optional Method 306,10 5 Multifamily Dwelling Unit Example.
Questions 220 32 Optional Method 306, Unit 12 Delta Delta and Delta Wye Part B Delta Wye Transformers 374. Transformer Calculations 361,12 15 Wye Transformer Voltage 374. 12 1 Current Flow 361,12 16 Wye Line and Phase Voltage Triangle 375. Part A Delta Delta Transformers 366,12 17 Wye Transformers Current 375. 12 2 Delta Transformer Voltage 366,12 18 Wye Line Current 375.
12 3 Delta High Leg 366,12 19 Wye Phase Current 376. 12 4 Delta Primary and Secondary,12 20 Wye Phase Versus Line Current 377. Line Currents 367,12 21 Wye Transformer Loading,12 5 Delta Primary or Secondary. and Balancing 378,Phase Currents 367,12 22 Wye Transformer Sizing 379. 12 6 Delta Phase Versus Line 368,12 23 Wye Panel Schedule In kVA 379.
12 7 Delta Current Triangle 369,12 24 Wye Panelboard and. 12 8 Delta Transformer Balancing 369,Conductor Sizing 379. 12 9 Delta Transformer Sizing 370,12 25 Wye Neutral Current 380. 12 10 Delta Panel Schedule In kVA 370,12 26 Wye Maximum Unbalanced Load 380. 12 11 Delta Panelboard and,12 27 Delta Wye Example 380.
Conductor Sizing 371,12 28 Delta Versus Wye 382,12 12 Delta Neutral Current 371. Unit 12 Questions 383,12 13 Delta Maximum Unbalanced Load 372. 12 14 Delta Delta Example 372,INTRODUCTION HOW TO USE THIS BOOK. Passing the Journeyman or Master Electrician s exam Each unit of this book contains objectives. is the dream of every electrician unfortunately many explanations with graphics examples steps for. electricians don t pass it the first time The primary reasons calculations formulas and practice calculation and 1999. that people fail their exam is because they are not prepared NEC questions As you read this book review the author s. on the technical material and or on how to take and pass an comments graphics and examples with your 1999 Code. Typically an electrical exam contains 25 percent Note This book contains many cross references to. Electrical Theory Basic Calculations 40 percent National other related Code rules Please take the time to review the. Electrical Code and 35 percent National Electrical Code cross references. Calculations This book contains hundreds of explanations As you progress through this book you will find. with illustrations examples and 2 400 practice questions some formulas rules or some comments that you don t. covering these subjects understand Don t get frustrated Highlight the section in. The writing style of this book is informal and relaxed the book that you are having a problem with Discuss it. and the book contains clear graphics and examples that with your boss inspector co worker etc maybe they ll. Electrician s Exam Preparation Electrical Fundamentals National Electrical Code NEC Calculations Contains 2 400 Practice Questions MIKE HOLT S ILLUSTRATED GUIDE Mike Holt ii 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

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