- Reaction score
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I don't think it will be a failing capacitor. Agreed, if it is flashing over from the wound element to the case, it will cause a leakage under voltage transient conditions. But I've tested an awful lot of capacitors, probably tens of thousands, of which quite a few have metal cans, and I don't remember seening any kind of breakdown to the case that has not also involved severe damage and total shorting or failure of the element itself.
One thing we haven't eliminated yet though, is aggregate leakage. If the suspect lighting circuit that was disconnected has high leakage, and a fault on another circuit pushes the total over the trip threshold when the motor starts, then disconnecting the lighting might prevent the trip without being faulty itself.
Occam's razor applies though, so this circuit is still the prime suspect.
One thing we haven't eliminated yet though, is aggregate leakage. If the suspect lighting circuit that was disconnected has high leakage, and a fault on another circuit pushes the total over the trip threshold when the motor starts, then disconnecting the lighting might prevent the trip without being faulty itself.
Occam's razor applies though, so this circuit is still the prime suspect.