gfi tripping causes

Old 06-22-03, 10:24 AM
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Question gfi tripping causes

on a hot tub, with a 120 volt blower running through a 50 amp 240 volt gfi disconnect, will running only the blower (pulling off only one leg) trip the gfi? i have come to understand (i think ) how they trip, but just curious. also what if the pump was also 120 volt, pulling off the other leg at a different amperage, then would it trip?
Old 06-22-03, 10:28 PM
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Properly wired, it won't trip the GFCI. A simple 120-volt GFCI compares the current in two wires. But a 240/120 GFCI, such as is used in a hot tub, compares the current in three wires.

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