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The ground indicating light on the main electrical switchboard is indicating a ground. What is the best procedure for locating the grounded circuit?
A) check circuit resistances with a megohmmeter connected between the grounded line and the distribution panel framework
B) check all circuits for continuity
C) trace the circuit paths while looking for burned spots
D) open the circuit breakers on the distribution panel, one at a time, until the lights no longer indicate a ground
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