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Based on the 2023 NEC.
Question: Fill in the blank. The minimum size plate used as a grounding electrode is _______.
See answer below.
Answer: 12 in. X 12 in.
Explanation: Section 250.52(A) (7) requires a minimum of 2 square feet of exposed surface for a plate electrode, a 12 in. X 12 in. plate would be 1 square feet per side.
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]
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