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Code Q&A: Listing Requirements for Type MC Cable

Nov. 16, 2017

NEC listing requirements for metal-clad (Type MC) cable and fittings

Q. What are the NEC listing requirements for metal-clad (Type MC) cable and fittings?

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Underlined text indicates a 2017 Code change.

A. Type MC cable must be listed. The fittings must be listed and identified for the use. [330.6]

Type MC cable is made with several types of metal sheaths. Steel and aluminum are the most common. It can also have a PVC jacket for supplemental protection. Fittings must be listed and identified for the specific type of MC cable being installed.

Type AC cable connectors can also be used if the fitting or container indicates that they can also be used for the Type MC cable being installed.

The NEC doesn’t require anti‑short bushings (red heads) at the termination of Type MC cable, but if they’re supplied it’s considered by many to be a good practice to use them.

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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.