cable trays cable splices

Code Q&A: NEC Requirements for Splicing Cables and Conductors Installed in Cable Trays

June 22, 2023
Test your knowledge of the NEC.

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Q.  What is the NEC requirement for splicing cables and conductors installed in cable trays?

See answer below.

A.  The NEC requirement for splicing cables and conductors installed in cable trays is stated in Sec. 392.56.

Splices are permitted in a cable tray if the splice is accessible and insulated by a method approved by the authority having jurisdiction. Splices can project above the side rails of the cable tray if not subject to physical damage.

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About the Author

Mike Holt

Mike Holt is the owner of Mike Holt Enterprises (, 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.

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