In this EC&M Tech Talk, Randy Barnett covers some of the most often used NEC rules for making grounding and bonding connections. In the first section the importance of making these connections properly, in accordance with code requirements, is stressed. Examples of what happens when faults do arise are given.
Section 250.8 of the NEC gives the 8 methods for making grounding and bonding connections. One of these methods must always be used. Images are used to illustrate several of the devices that may be used. Making connections to grounding electrodes is of importance. Unfortunately, these rules are sometimes violated!
Finally, some of the more important requirements NEC requirements for bonding with equipment grounding conductors. Grounding receptacles to metal boxes is discussed as some can become confused with the specifics of these rules.
Proper grounding and bonding helps meet the purpose of the NEC – protecting people and property from electrical hazards!
About the Author
Randy Barnett
CESCP
Randy Barnett is an NFPA Certified Electrical Safety Professional, a long-time journeyman electrician, instructor and author with expertise in industrial electrical construction and maintenance. He is Electrical Codes & Safety Manager for NTT Training. Because of his ability to develop and deliver quality programs, Randy has trained more than 10,000 students in all 50 states, including Canada, Singapore, Afghanistan, Dubai, Trinidad, and Saudi Arabi. His articles appear in numerous trade publications and, his book on "Commercial and Industrial Wiring" is used as an entry-level text in many electrician training programs. Randy also appears at various corporate and trade association speaking engagements and consults on training program design and implementation. Randy is a graduate of the U.S. Navy Nuclear Power School, served as a nuclear electrician in submarines and holds a B.S. in business.