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Code Q&A: Marking Requirements for Sign Disconnects

Oct. 13, 2022

Test your knowledge of the NEC.

Based on the 2020 NEC.

Q. What is the Code rule for marking disconnects for signs in commercial buildings?

See answer below.

A. A disconnecting means for a sign, outline lighting system, or controller must be marked to identify the sign, outline lighting system, or controller it controls. [Sec. 600.5(B)]

Exception: An external disconnecting means that is mounted on the sign body, sign enclosure, sign pole, or controller is not required to identify the sign or outline lighting system it controls.

These materials are provided to us by Mike Holt Enterprises in Leesburg, Fla. To view Code training materials offered by this company, visit www.mikeholt.com/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.