USCG Exam PracticeSwitchboards and distribution systems
Under 46 CFR §111.30-29, a test switch is required at the emergency switchboard. What is the specific purpose of this test switch?
- A. To test the ground detection system for the emergency lighting circuit
- ✓ To simulate a failure of the normal power source and cause emergency loads to be supplied from the emergency power sourceCorrect
- C. To test the automatic voltage regulator by cutting it out of the circuit
- D. To verify continuity of the bus-tie feeder between the emergency and main switchboards
Why B is correct
46 CFR §111.30-29(b) specifically requires a test switch at the emergency switchboard to simulate a failure of the normal power source and cause the emergency loads to be supplied from the emergency power source. The other functions listed are separate requirements under different provisions.
Cited:46 CFR §111.30-29