NM Residential Electrical Inspector Practice Questions - New Mexico CID Residential Electrical Inspector Examination Exam

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Per NMAC 14.10.4.12 amending NEC 250.50, on new construction a concrete-encased electrode shall be considered available and installed. If a concrete-encased electrode is not present, New Mexico requires at least 20 feet of 2 AWG bare copper in a continuous trench at a depth of not less than 30 inches, augmented with which of the following?

A single 4-foot rod at one end A minimum of two 8-foot ground rods, one at each end of the 2 AWG conductor No additional electrodes A metal water pipe only

Correct Answer:

A minimum of two 8-foot ground rods, one at each end of the 2 AWG conductor

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