I have another case of GFI shore power
tripping, but my case seems to be a little more unique than what I can search up.
I was over joyed to move into one of the fancy new covered slips in my marina, but then I was slapped in the face with GFI. I can motor
over to my old slip and plug
in and run all day with zero issue, but the old slip doesn't have a ground fault breaker.
The uniqueness of my situation is that everything works except the compressor motor
on my Mermaid Air Conditioning
unit which will trip the circuit breaker on the shore about 1 second after powering on. I can have everything else in the cabin
running without issue. Even on the Mermaid I can have the water pump
and the blower fan running and not have a problem. Could the compressor
motor itself have a neutral to ground fault in it? I don't see one in the electrical
connections, but seeing as how this same motor works on the old shore power
it is sure looking like there is some neutral to ground leakage. I haven't got my hands on a clamp tester yet to prove it, but I will. Though I don't see what else it could be.
My knee jerk reaction was that I'd need to replace the compressor motor, but then I got to thinking that if the motor itself has the fault in it...was it designed like that? Will a new motor even help? Has any one dealt with Mermaids and GFI before?
Apparently there is ONE
guy in my area with any experience working on these GFI issues in a marine environment
and I haven't been able to even contact him yet. So any help on things to try would be much appreciated.
Stuff I've tried:
Plugging into another shore power receptacle that is known to be working.
Used a different cable
Used a different cable with an ELCI breaker built in
Bypassed the compressor motor overload switch
Runs fine on generator
and non-GFI shore power...pulls about 12 amps
Isolated the issue to the Mermaid and verified it only happens when the compressor runs
Thanked ABYC for keeping all the people crazy enough to swim in a marina safe (yeah I know...accidents happen, but still...