When using the test set-up shown in figure "A" of the illustration, besides the motor windings and the motor feeder cable, what circuit components are actually being meggered? EL-0027

Correct Answer: Option C — the power circuit of the starter up to the load side of the main contacts

Testing with leads connected at the motor feeder cable includes the motor windings, feeder cables, and the starter power circuit up to the load side of the main contactors. Per IEEE 45, isolating the line side prevents damaging solid-state control components and sensitive metering instrumentation during insulation resistance testing.