Marine Electrical Systems USCG Question #492 (Set 17)

When a motor is started by the controller shown in figure "C" of the illustration, what circuit components are in the holding current flow path through the control circuit while the motor is in operation? Illustration EL-0010

USCG Exam Illustration EL-0010
USCG Examination Diagram: Illustration EL-0010
Official USCG Answer & Rule Citation

Correct Answer: Option D — the stop button contacts, the "B1" contacts, the "M" contacts, the "M" coil and the "OL" contacts

Holding circuit current flows continuously through the closed stop button, auxiliary interlock contacts, main contactor coil 'M', and thermal overload contacts ('OL') to maintain energization after the start button is released.

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