USCG Exam PracticeElectrical basics — generators, motors, and safety
What is the maximum overcurrent device setting permitted to protect a shipboard generator?
- A. 100 percent of the generator full load rating
- B. 125 percent of the generator full load rating
- ✓ 115 percent of the generator full load ratingCorrect
- D. 80 percent of the generator full load rating
Why C is correct
46 CFR §183.320(f) states that each generator must be protected by an overcurrent device set at a value not exceeding 115 percent of the generator full load rating. The 80 percent figure applies only to derated machines, and 125 percent is a common distractor from motor circuit rules.
Cited:46 CFR §183.320