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Code Q&A: NEC Cord and Cable Protection Requirements

Nov. 11, 2021

Test your NEC knowledge.

Based on the 2020 NEC.

Q. What manner of protection is required by the Code for flexible cords when passing through holes in covers, outlet boxes, or similar enclosures?

See answer below.

A. Flexible cords and flexible cables must be protected by bushings or fittings where passing through holes in covers, outlet boxes, or similar enclosures [Sec. 400.17].

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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.