Marine Electrical Systems USCG Question #538 (Set 18)

For the purpose of calculating apparent power, which of the following procedures should be used to determine the total load current of a three-phase, delta wound, AC generator?

Official USCG Answer & Rule Citation

Correct Answer: Option C — Multiply the amperage in one phase by the square root of three.

In a three-phase delta-connected generator, the line current equals the phase current multiplied by the square root of three (approximately 1.732). This mathematical relationship is essential for calculating apparent power (kVA) and sizing distribution switchboard components accurately.

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