National Electrical Code

Code Q&A

Feb. 13, 2007

Q. Does the Code require bonding around raceway knockouts for 120V, 208V, or 240V feeders and branch circuits? A. You must bond all metal parts intended to serve as the effective ground-fault current path, such as raceways, cables, equipment, and ...

Mike Holt

Q. Does the Code require bonding around raceway knockouts for 120V, 208V, or 240V feeders and branch circuits?

A. You must bond all metal parts intended to serve as the effective ground-fault current path, such as raceways, cables, equipment, and enclosures, together to ensure they have the capacity to safely conduct any fault current likely to be imposed on them [250.96(A)]. If the knockouts are damaged, the integrity of the fault current path is jeopardized, and you must then bond around them. If the knockouts are not damaged, no extra bonding is required.

About the Author

Mike Holt

Mike Holt is the owner of Mike Holt Enterprises (www.MikeHolt.com), one of the largest electrical publishers in the United States. He earned a master's degree in the Business Administration Program (MBA) from the University of Miami. He earned his reputation as a National Electrical Code (NEC) expert by working his way up through the electrical trade. Formally a construction editor for two different trade publications, Mike started his career as an apprentice electrician and eventually became a master electrician, an electrical inspector, a contractor, and an educator. Mike has taught more than 1,000 classes on 30 different electrical-related subjects — ranging from alarm installations to exam preparation and voltage drop calculations. He continues to produce seminars, videos, books, and online training for the trade as well as contribute monthly Code content to EC&M magazine.