NM CID EL-1 Practice Questions - New Mexico CID EL-1 Electrical Distribution Systems, Including Transmission Lines Examination Exam

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NEC 2020 250.64(A) permits an aluminum or copper-clad aluminum grounding electrode conductor outdoors only if it is not in contact with masonry or earth and is not installed within how far of the earth?

6 inches 12 inches 18 inches 30 inches

Correct Answer:

18 inches

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