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].