The ground indicating light on the main electrical switchboard is indicating a ground. What is the best procedure for locating the grounded circuit?

Correct Answer: Option A — open the circuit breakers on the distribution panel, one at a time, until the lights no longer indicate a ground

Systematic isolation via individual distribution panel circuit breakers is the standard IEEE 45 and 46 CFR Subchapter J troubleshooting method. Opening breakers one at a time localizes the single-phase ground fault when the switchboard ground detection lights return to normal ungrounded indications.