The 20% of the National Electrical Code You Need to Know 80% of the Time
NEC 2008 Need to Know puts the most commonly used information where electricians need it most - on the job site. Smaller than large, bulky manuals, it facilitates quick access to both general information and calculations often used to comply with codes regarding conduit size, required ampacities, and electrical loads. Complete with a handy cross-reference table, this easy- to-use guide covers general installation requirements for branch circuits, feeders, over-current protection, switches, receptacles, and much more.
Turn to NEC 2008 Need to Know for quick access to vital 2008 National Electrical Code
information that you need. This expert resource explains and interprets key material from the first four chapters of the National Electrical Code, including general installation requirements . . . branch circuits . . . feeders . . . services . . . overcurrent protection . . . grounding . . . conductors . . . conduits . . . cables . . . fixture wiring . . . switches . . . receptacles . . . lighting . . . motors . . . a/c and refrigeration . . . and generators - plus critical tables from Chapter 9.
Packed with on-target illustrations, this essential compliance tool contains calculations and formulas commonly used to determine conduit and conductor sizes, required ampacities, adjustment multipliers, and electrical loads. This guide also presents a listing of specialty topics such as Emergency Systems, Communications, and Special Occupancy, as well as a cross-reference table with types of installations and where to find applicable Code. Designed to save time and money, reduce errors, and increase safety, NEC 2008 Need To Know features:
- Clear explanations and interpretations of in-demand National Electrical Code information.
- Commonly used calculations and formulas.
- A listing of specialty topics keyed to applicable Code.
- A handy cross-reference table for quick access to crucial material.
Inside this On-the-Job Guide to Vital National Electrical Code Information:
From the Preface
- General Requirements for Electrical Installations.
- Branch Circuits and Feeders.
- Branch Circuit Feeders and Service Calculations and Electric Services.
- Overcurrent Protection and Transformers.
- Grounding and Bonding.
- Wiring Methods.
- Boxes and Cablebus.
- Lighting Requirements.
- Refrigeration and A/C.
- Understanding and Applying National Electrical Code Chapter 9 Tables.
- Code Locations and References for Additional Codes.
If you are an apprentice, journeyman, master electrician, designer, estimator, or contractor, then right now you hold in your hand the key to understanding and applying the essential sections of the National Electrical Code. Purchasing this book could very well be the best business decision you could make.
Think about a typical electrical job. There are codes that you have to comply with on a regular basis. The average electrician or contractor is not out installing wiring or equipment in a hazardous or classified location every day or connecting fire pumps, fuel cells, escalators, or hoists. If you were to take your code book and cut out all the articles and sections that only pertain to the work you do day in and day out, you would probably be holding about 20 percent of the overall text in your hand. These are the code provisions that you need to know, and this book was written to help you understand what they are and how to use them in your daily work.
Throughout my 25 years of experience in the construction industry I have seen electricians, contractors, and even engineers struggle to grasp the intention, direction, and requirements of the National Electrical Code. Part of the problem is that people with hands-on experience in the industry usually deal with materials and installation needs from a practical point of view, not through the eyes of an electrical inspector. Contractors look for cost-efficient approaches, designers focus on aesthetics, estimators deal with unit pricing and total square footage, and electricians in the field are constantly striving to get their work done on time. The one common factor that connects all of these occupations is that any job that includes electrical work has to meet National Electrical Code standards. It is one thing to own a code book and quite another to really understand the code and know where the various requirements for typical electrical installations can be found.
Ignorance or misinterpretation of the code can have disastrous results. Think about the cost of copper today and what would happen if you ordered the wrong cable or conduit for an installation. What if you overlooked the new code requirement for arc-fault circuit interrupters (AFCIs) for branch circuits in newly constructed dwellings and had to add them after the job was complete? Can you imagine how much time and money that would cost? Ask yourself this: Do you really understand the new section that was added in National Electrical Code 210.4(D) that requires all the associated conductors of a multiwire branch circuit, including the grounded conductor, to be physically grouped together at least once by wire ties or a similar means within the branch-circuit overcurrent device enclosure? Can you quickly explain the definitions of a "neutral conductor" and a "neutral point" that were added to the 2008 National Electrical Code Article 100?
The book you are holding right now is designed for anyone who has ever felt overwhelmed by the complexity of the National Electrical Code or become frustrated trying to locate a specific section of the code. The purpose is to protect you from costly violations and inspection rejections that can happen because you just weren't clear on the meaning behind a standard or what the current edition of the code requires.
Each chapter explains key code requirements in plain English and provides you with code updates from the 2008 edition of the National Electrical Code. There are Trade Tips throughout the book that provide hints about applying the code and "Did You Know?" callout boxes with quick references and Do's and Don'ts for the electrical trade. You'll have the latest requirements at your fingertips for general installation branch circuits, feeder, and service calculations, overcurrent protection, grounding, and even generators and transformers. And don't forget that the whole purpose of the National Electrical Code is to safeguard people and property from the many hazards associated with electricity. To achieve this goal, you have to have a clear and comprehensive understanding of the National Electrical Code as well as a working knowledge of the electrical trade. That's why this book also includes extra information on subjects such as NFPA 70E, electrical terms, conversion and calculation tables, and a cross-reference of associated code articles, NEC 2008 Need to Know brings together all the elements you need to design, estimate, and install electrical systems and equipment while explaining code requirements in a way that you can easily understand so you can comply with the National Electrical Code. It's like having your own personal condensed code book that gives you just what you need to know to optimize your time and increase your effectiveness.
I believe you are going to find this an essential asset to your daily work in the electrical industry.
Best regards to all the "Sparkies" out there!
- K. J. Keller
Table of Contents
Chapter 1: General Requirements for Electrical Installations. Chapter 2: Branch Circuits (210) and Feeders (215). Chapter 3: Branch Circuit Feeders and Service Calculations (220) and Electric Services (230). Chapter 4: Overcurrent Protection and Transformers (240). Chapter 5: Grounding and Bonding (250). Chapter 6: Wiring Methods (300). Chapter 7: Conductors (310). Chapter 8: Boxes and Cablebus (370). Chapter 9: Lighting Requirements (410). Chapter 10: Motors (430). Chapter 11: Refrigeration and A/C (440). Chapter 12: Generators (445). Chapter 13: Understanding and Applying National Electrical Code Chapter 9 Tables. Chapter 14: Code Locations and References for Additional Codes. Appendix A: Tables. Appendix B: Conversion Methods. Appendix C: Terminology. Appendix D: Electrical Symbols.
About the Author
K J Keller
is currently the CAD Designer, Safety and Compliance Director, and Project Coordinator for one of New England's most prominent electrical contractors. With over 30 years in the construction industry, she has been a journeyman plumber, has worked in both remodeling and new construction, and has extensive experience in residential and commercial general contracting and the plumbing and electrical trades. Ms. Keller is the co-author of McGraw-Hill's Electrician's Exam Study Guide.