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Code Quiz: Splice Requirements

Nov. 16, 2023

Test your knowledge of the NEC with this challenging question.

Based on the 2023 NEC.

Question: If the conductors of a type NM cable are damaged in a box by a drywall router such that there is less than 6 in. of conductor, can the conductor be extended with a splice or must the cable be replaced?

See answer below.

Answer: A splice is permitted to extend the conductor.

Explanation: Section 300.14 was modified in the 2023 NEC to clarify the 6 in. of free conductor required can be spliced or unspliced.

Lupacchino is a senior design engineer with Gaylor Electric, Inc. in Noblesville, Ind. and serves as an alternate on NEC Code-Making Panel No. 3. He is currently licensed in more than 80 jurisdictions. He can be reached at [email protected]

About the Author

John Lupacchino | Senior Design Engineer

John began his career in electrical construction as an apprentice and worked his way through the trade. He is currently licensed in more than 80 jurisdictions. With more than 35 years of experience, he now plays a vital role in Gaylor Electric’s Engineering Department, where he serves as a senior design engineer. With a focus on design engineering, quality assurance, and code compliance, he has earned the highest level of respect from industry professionals alike. John currently serves as an alternate on NFPA 70 Code Making Panel No. 3. In addition, he enjoys sharing his electrical knowledge through education. As an Associated Builders and Contractors instructor, he continues to help grow a new generation of high-performing construction leaders.