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

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In a one-family dwelling, a communications grounding conductor run to the power grounding electrode system exceeds 20 feet. What should the inspector require under NEC 800.100(A)(4)?

Accept the long run because communications grounding conductors have no length limit Require the conductor to be as short as practicable and not more than 20 feet, or permit a separate communications ground rod that is bonded to the power grounding electrode system with a conductor not smaller than 6 AWG copper Require the communications ground to be isolated from the power electrode system Require the communications ground to land only on a metal water pipe more than 5 feet from the point of entrance

Correct Answer:

Require the conductor to be as short as practicable and not more than 20 feet, or permit a separate communications ground rod that is bonded to the power grounding electrode system with a conductor not smaller than 6 AWG copper

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