Why should an electrical worker determine the nominal voltage of a circuit first before making contact with the circuit?

Correct Answer: Option B — So the worker can select the proper PPE and voltage tester to use before contact with the circuit is made.

Determining nominal circuit voltage prior to contact is mandatory under marine safety standards to ensure proper selection of personal protective equipment (PPE) and appropriately rated voltage-sensing instruments, preventing catastrophic meter failure and severe arc-flash injuries.