If the supply voltage is 220 volts 60 Hz, what is the operating voltage of the motor controller control circuit illustrated in figure A of the illustration? Illustration EL-0011

Correct Answer: Option D — 220 volts AC

Standard marine motor control circuits powered directly from a 220V 60Hz single-phase source without a step-down control transformer maintain the exact supply potential. Per IEEE 45 and 46 CFR Subchapter J standards, unfaulted control buses replicate primary distribution characteristics unless isolation is provided.