Code Q&A: Grouping of Neutral Conductors

Jan. 8, 2015

NEC rules regarding the grouping of neutral conductors

Q. When multiple branch circuits are present in an enclosure, what does the Code require in regard to grouping of neutral conductors?

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A. The ungrounded and neutral conductors of multiple branch circuits must be grouped together by cable ties or similar means in every enclosure [200.4(B)], as shown in the Figure.

Exception No. 1: Grouping isn’t required where the circuit conductors are contained in a single raceway or cable unique to that circuit that makes the grouping obvious.

Exception No. 2: Grouping isn’t required if the conductors pass through a box or conduit body without any splices or terminations, or if the conductors don’t have a loop as described in 314.16(B)(1).

Section 210.4(D) contains a similar requirement for branch circuit conductors.

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.