USCG Exam PracticeSwitchboards and distribution systems
An AC emergency switchboard is required by 46 CFR §111.30-29 to have a voltmeter with a selector switch capable of showing which of the following?
- ✓ Generator voltage of each phase and bus voltage of one phaseCorrect
- B. Bus voltage of each phase and generator voltage of one phase
- C. Generator voltage of one phase and load voltage of each phase
- D. Bus voltage of each phase and load current of each phase
Why A is correct
46 CFR §111.30-29(f)(2) requires the voltmeter selector switch to show generator voltage of each phase and bus voltage of one phase. The options reversing phase coverage between generator and bus are plausible but incorrect.
Cited:46 CFR §111.30-29