re: AFCI - Breaker keeps tripping.

quote:

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Use an ohm meter to check for a short by touching the leads to the black wire and white wire. Then black to ground. Then white to ground.

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There is a reasonably good chance that white and ground are bonded at the main box so that would read like a short anyway. But black to white should give you an infinite reading if nothing is connected to the circuit. If it reads anything, verify nothing is plugged in or switched on. Any coil on the circuit may look a lot like a short,