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

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The largest ungrounded service-entrance conductors are 3/0 AWG copper. What is the minimum copper grounding electrode conductor required by NEC Table 250.66, before applying the 250.66(A) through (C) electrode exceptions?

8 AWG 6 AWG 4 AWG 2 AWG

Correct Answer:

4 AWG

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