Quote:
Originally Posted by Cajundaddy
Two possibilities. Either you have a fountain pump with some current leakage to ground or the GFCI has failed and is nuisance tripping. Changing the wire size or breaker will not solve the problem. 99% of the time it is a failed fountain pump so I would test for continuity between hot to ground on the pump wiring. Anything above OL (zero) is a grounded pump that needs replacing.
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Bingo
If the pump tests out, then consider the GFCI recep might be getting soft. It's most likely doing it's job measuring current delta between hot and neutral.