Before any work on electrical or electronic equipment is performed, which of the following precautions should be carried out （）<br>A:De-energize the applicable switchboard bus<br>B:Bypass the interlocks<br>C:Secure and tag the supply circuit breaker in the open position<br>D:Station a man at the circuit supply switch

Before any work on electrical or electronic equipment is performed, which of the following precautions should be carried out （）
A:De-energize the applicable switchboard bus
B:Bypass the interlocks
C:Secure and tag the supply circuit breaker in the open position
D:Station a man at the circuit supply switch

出自：海船船员证

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