This is why I thought of gremlins...: Dedicated 15 A 120 VAC ckt. to SP switch to GFI (GFI 1) near pump location. Changed customer supplied GFI (GFI 1 to my own GFI 2) - still trips. Runs okay on another (older) GFI (GFI 3) in garage on extension cord. Bypassed switch - still trips. Bypassed entire run from panel to GFI, still trips. Changed breaker (getting desperate...) - still trips. Runs okay on non-GFI receptacle (and draws 17 + amps for a half a sec or so). Ground and neutral connections good. Replaced GFI 3 with GFI 2 and it runs okay. (cue spookey music....)Thinking about going to a GFI breaker....
