Question 186Electricity & Electronics - 1st Asst/Chief

The correct answer is B) Disconnect the phase connections to common first, then disconnect the common connection to hull ground. This is the correct procedure because it ensures the grounding path is maintained until the very last step. Disconnecting the common to hull ground connection first would leave the circuit ungrounded, which poses a safety risk. By disconnecting the phase connections first, the circuit remains grounded through the common connection until the final step, minimizing the chance of electric shock or other hazards. The other options are incorrect because they either do not maintain the grounding path or do not follow the proper sequence.