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

A substation ground grid of buried bare conductors and ground rods is designed primarily to:

increase soil resistivity under the crushed-rock surfacing carry ground-fault current into the earth and keep touch and step voltages within safe limits serve as the only required equipment grounding conductor for customer services replace the incoming transmission-line shield wires

Correct Answer:

carry ground-fault current into the earth and keep touch and step voltages within safe limits

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