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40 Amp Gfi For 50 Amp Spa


tjb32

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Got a used 2100 cal spa, read the specs as 220v, 40 amp so we installed a 40 amp disconnect (10 feet) then to a 40 amp GSI breaker in the breaker box (60 feet). Ran all the wire (6 gauge aluminum from the breaker box to the disconnect, with an extra ground wire), then copper from the disconnect to the spa. As soon as we turn on the GSI breaker it immediately trips.

Then we read where it needs a 50 amp GSI. My question: Would a 40 amp GSI always trip when meant for a 50 amp?

Then we realize we should have put the GSI at the disconnect and not so far away. Would running the GSI that far always trip right away?

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if it's tripping immediately and won't stay on at all you most likely have it wired wrong assuming that there was no ground fault in it when you bought it. Did you see it operating? If the circuit was overloaded it would stay on at least for a couple seconds. You have a GF somewhere.

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