Code Q&A

Dec. 3, 2009

Q. I recently saw a service disconnect that was being used as a conduit for two feeder circuits. Is this legal?

A. The requirement in 230.7 states that service conductors shall not be installed in the same raceway or cable with feeder or branch circuit conductors. However, this rule doesn't prohibit the mixing of service, feeder, and branch circuit conductors in the same service equipment enclosure. Therefore, what you described is permitted by the Code.

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.