Quote:
Originally Posted by RF5BPilot
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The single circuit branches to three outlets that are in the same box. Each branch is controlled separately -- allowing different pumps to operate independently, but protected by the same GFCI breaker.
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GFCI trips when it measures a difference in current, 20-30ma. Some of this may be coming from the other wiring on the circuit, and should be measurable with an ammeter. Leakage on the other circuits will add.
Chasing ghost trips
Having said that, it is likely the pump(could be the breaker), and the test outlet is less sensitive than the breaker. But I would check the other circuits, or disconnect them and see it pump still trips.