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Updated throughout to reflect changes to the 2008 National Electrical Code, Electrical Grounding and Bonding, 2nd Edition, provides you with a comprehensive introduction to the essential elements of electrical grounding and bonding. It examines the critical concepts of calculating conductor sizes, reading and interpreting 2008 National Electrical Code tables, the use of grounded conductor connections in DC and AC systems, as well as various installations and sizing. Material is reader-friendly and is accompanied by straightforward, easy-to-understand explanations of key concepts that foster understanding. A functional use of color and dynamic illustrations augments the book and further supports this thorough student- and professional-level approach to electrical grounding.
Features:
Updated content includes a list of methods permitted and not permitted for connecting grounding and bonding conductors.
Many significant changes added to definitions in Article 100.
New clarifying rules were added on installing main or system bonding jumpers for service or separately derived systems.
A new section has been added covering the grounding and bonding requirements for permanently installed generators.
Extensive revisions and expansion of requirements made for intersystem bonding, such as for communication systems.
Clear and specific explanations show readers how to calculate a conductor size, as well as how to read and interpret 2008 National Electrical Code tables.
Important features, such as objectives, at the beginning of each chapter and review questions at the end reinforce key concepts and principles.
Attention-grabbing four-color artwork engages you in the material, facilitating learning.
From the Preface
Why another book on electrical grounding and bonding?
Over the years, the author has found so much confusion about the rules for grounding and bonding electrical systems that an attempt is being made to take this subject back to the basics and, where possible, relate grounding and bonding to basic electrical circuits.
Electricity follows the basic laws of physics, regardless of whether it is current flow over ungrounded (hot) conductors, over grounded conductors (sometimes neutral conductors), or in the grounding system. So, if we can understand basic circuit flow, we can understand the requirements and performance rules for grounding and bonding of electrical systems and equipment. You will find several of the illustrations in this book to be fairly basic and uncomplicated. This complements the overall effort to make the rules for grounding and bonding as easy to understand as possible and to take the concepts of grounding and bonding back to the basics.
I want to mention here and applaud the efforts of Ronald P. O'Riley, who wrote a book titled Electrical Grounding: Bringing Grounding Back to Earth through the sixth edition. Mr. O'Riley is now deceased. Although this book is not based on or intended to be a continuation of Mr. O'Riley's efforts, our goals in presenting a book on grounding and bonding of electrical systems are very similar. Quoting from the preface to Mr. O'Riley's sixth edition:
"The author's wish is for this book to be a learning experience for members, and those in training for a career in the electrical industry. It is the author's hope that simplifying, illustrating, reasoning through, and coordinating the grounding requirements, as contained in Article 250 of the National Electrical Code, will promote better understanding and use of the Code. This can result in safer, cleaner electrical installations and maintenance. The first rule is to make it safe: the second is to make it work. Both can be done. With this thought in mind, this book is directed at vocational instructors of electricity, electrical engineers, design engineers, construction electricians making installations in the field, maintenance electricians at factories or buildings, electrical inspectors, and many other members of the electrical industry. It is also the author's hope that the apprentice or person preparing for a career in the electrical industry and studying the National Electrical Code will find the detailed explanations and accompanying diagrams in this book to be an interesting learning experience."
Electrical Grounding and Bonding is based on my many years of experience in teaching subjects related to the National Electrical Code field experience in the electrical construction industry, and association with the International Association of Electrical Inspectors (IAEI).
Other than the Introduction, which includes an explanation of many definitions applicable to electrical grounding and bonding along with a brief review of electrical theory, this book is organized by section number of the National Electrical Code. So, if you're interested in learning about requirements for a grounding electrode system, you can follow the rule from the National Electrical Code Section 250.50 to an identical code reference in this book.
Other features of the organization of this book are as follows:
1. The requirement from the National Electrical Code is included. Note that in most cases, the requirement is paraphrased rather than being a direct quote.
2. The requirement is discussed and explained.
3. An illustration of the requirement is provided.
4. Where appropriate, there is an explanation of how to comply with the rules, such as determining the appropriate size system bonding conductor.
About the Author
Phil Simmons is licensed as a master electrician and was owner and manager of Simmons Electric Inc, an electrical contracting company. Phil previously served as Chief Electrical Inspector for the State of Washington as well as an Electrical Inspector Field Supervisor, Electrical Plans Examiner and field Electrical Inspector. Mr Simmons presently serves NFPA on Code Making Panel 5 of the National Electrical Code Committee and previously served on the National Electrical Code CMP-1 (Articles 90, 100 and 110) as Char of CMP-19 (articles on agricultural buildings and mobile and manufactured buildings) and member of CMP-17 (health care facilities). He served six years on the NFPA Standards Council, as NFPA Electrical Section President and on the National Electrical Code Technical Correlating Committee.
Table of Contents
Foreword. Preface. Changes to National Electrical Code Articles 100 and 250 for the 2008 Edition. Introduction to Grounding and Bonding. Unit 1: General. Unit 2: System Grounding. Unit 3: Grounding Electrode System and Grounding Electrode Conductor. Unit 4: Enclosure, Raceway, and Service Cable Connections. Unit 5: Bonding. Unit 6: Equipment Grounding and Equipment Grounding Conductors. Unit 7: Methods of Equipment Grounding. Unit 8: Grounding of Specific Equipment Covered in Chapter 5 of the 2008 National Electrical Code. Appendix A: Some Fundamentals of Equipment-Grounding Circuit Design. Appendix B: Investigation and Testing of Footing-Type Grounding Electrodes for Electrical Installations. Appendix C: Understanding Ground Resistance Testing. Appendix D: Report of Research on Conduit Fitting Ground-Fault Current Withstand Capability. Index. |
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