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NM Electrical Inspector (General) Practice Questions - New Mexico CID Electrical Inspector (General) Examination Exam

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A concrete-encased electrode complying with NEC 250.52(A)(3) must consist of at least 20 feet of bare copper conductor not smaller than 4 AWG, or at least 20 feet of one or more electrically conductive steel reinforcing bars or rods of not less than what diameter?
Correct Answer:
1/2 inch

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