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Code Q&A: Multiple Branch Circuits

May 5, 2016

NEC requirements for multiple branch circuits

Q. What is the Code rule that applies if two or more branch circuits supply devices or equipment on the same yoke?

Find the Answer

A. If two or more branch circuits supply devices or equipment on the same yoke, a means to disconnect simultaneously all ungrounded conductors that supply those devices or equipment is required at the point where the branch circuit originates [210.7].

A yoke, also called a strap, is the metal mounting structure for a receptacle, switch, switch with pilot light, switch-receptacle, and so forth. Individual single-pole circuit breakers with handle ties identified for the purpose, or a circuit breaker with a common internal trip, can be used for this application [240.15(B)(1)].

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.