audel guide to the 2002 national electrical code

[...]... We have endeavored to explain each section of the code in the same way we would if we were standing on a job site *National Electrical Code and NEC ® are registered trademarks of the National Fire Protection Association, Inc., Quincy, MA xv xvi Contents Foreword You will have to use the Guide to the 2002 National Electrical Code in conjunction with the National Electrical Code, as the NFPA does not... requirements for electrical installations By omitting the engineering and design requirements, most of the confusion of the NEC is eliminated in one stroke This leaves only the rules that actually apply to installing electrical wiring—which is the reason the code is referred to 99% of the time In addition to doing away with all of the NEC requirements that do not pertain to installing electrical wiring, the entire... approximately 10 to 15 persons, the majority of them engineers Members of each committee meet several times, discuss all proposed changes, accepting some and rejecting others, and rewrite (as required) the sections of the Code that were assigned to their committee Then, they circulate the changes among the various committees, coordinate the changes, and rewrite again So, obviously, the updating of the NEC is... place These guides serve to make all parts of the Code understandable They are written for engineers, designers, installers, and inspectors The book you now hold in your hands is substantially different from standard NEC guidebooks Rather than seeking to write a new guidebook covering everything in the NEC, we have eliminated all of the engineering and design regulations, and concentrated only on the. .. else to print their code As you go through both this book and the Code, you will find numerous references to other codes and standards All of these (except as noted) are published by the NFPA, Quincy, MA, and are available from that organization These various codes and standards are useful but must always be used in conjunction with the NEC, not separate from it My sincere thanks go to all of the fine... entire text of the book has been arranged according to the type of installation This way, the reader can simply turn to the appropriate section for the type of wiring being installed, and quickly find all of the installation requirements for the work at hand Aside from the requirements mentioned for each section, no other requirements should apply to the work covered therein All of the many electricians... not just from overcurrents This requires the installer to get the cooperation of the utility company to verify available fault currents at the point of service 110.10: Circuit Impedance and Other Characteristics The fault currents are limited only by the capacity of the electrical supply, the impedance of the supplying circuits, and the wiring As an example, the fault current will be much larger in... everyone who has been required to use the National Electrical Code (NEC ®)* on a regular basis has often wished that it were easier to understand Often, it seems that it lacks sufficient clarity and detail; and other times, it seems to be overflowing with useless information The purpose of this book is to help the reader sort through the voluminous code regulations and find the information he or she needs,... voltages, the voltage is the rms voltage as explained in Article 100 There are really three general classifications of voltages in the Code 0 to 50 volts; 50 to 600 volts; and voltages that exceed 600 volts Each is dealt with in separate parts of the Code If wires having different voltages are run in the same raceway, there are specific rules to be followed No electrical equipment may be connected to a... chore But the real difficulty is that it must remain applicable to all types of electrical installations, leaving no “gaps.” Because of this, it becomes rather difficult to interpret in many instances In this book, our intent is to explain each section of the code clearly and simply The engineers who write the code are deeply concerned with technical accuracy and completeness To their credit, they generally . Contents You will have to use the Guide to the 2002 National Electrical Code in conjunction with the National Electrical Code, as the NFPA does not permit us or anyone else to print their code. As you. of the Code that were assigned to their committee. Then, they circulate the changes among the various committees, coordi- nate the changes, and rewrite again. So, obviously, the updating of the. email=yyepg@msn. com Reason: I attest to the accuracy and integrity of this document Date: 2005.01.29 11:01:35 +08'00' Audel ™ Guide to the 2002 National Electrical Code ® All New Edition Paul