A standard breaker will trip for an overload, a short circuit, or overheating at itself (the first three causes below). To solve their tripping usually involves sorting out which of these three causes is at work. But with an arc-fault breaker, there can be two additional causes to add ...
(One exception about the breaker that allows resetting is if the breaker sometimes gets hot during normal loads because of poor connections at or in it; this will make it false-trip at times.)... On the other hand, if a resetting results quickly in a retripping, then you have a short...
Once the mains supply switch or circuit breaker that powers the motor is located, it should be turned off. Verifying voltage levels can ensure the correct disconnection procedure. To further enhance safety, lockouts/tagouts can eliminate the danger of re-energization. With the power disconnected,...