Code Quiz: EGC Sizing

Nov. 13, 2019
Test your knowledge on EGC sizing.

Question: What is the smallest size black wire that may be taped green for use as an equipment grounding conductor (EGC)?

See the answer below.

Answer: 4 AWG

Explanation: Sec. 250.119(A) permits the re-identification of EGCs, 4 AWG and larger, at the time of installation utilizing green tape. Smaller conductors must be green from the factory or be bare.

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.

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