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

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On new construction in New Mexico, if a concrete-encased electrode is not present, NMAC 14.10.4 requires at least 20 feet of 2 AWG bare copper in a continuous trench not less than 30 inches deep, plus:

no additional electrodes one 4-foot rod at the midpoint only a minimum of two 8-foot ground rods, one at each end of the 2 AWG conductor a metal water pipe at least 300 feet long

Correct Answer:

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

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