OK, I'll bite
I have a 93 Pace Arrow Diesel Pusher (for Sale). It's 50 amp.
Pulled into CG with 20amp GFI outlet. EVERY time I plugged my coach in the GFI would trip on the pedistal. I shut off ALL 120v breakers......Still tripping the GFI when I plugged in!
Got really tweaked and was determined to find the culprit!
removed the cover on the LARGE Xfer switch.
Would disconnect a load, plug in. If the GFI tripped I would reconnect the load & move to te next.
FOUND IT!
I traced the line/load that was tripping the GFI and found a 120VDC cut out relay. The purpose of this relay was to dis-connect the forward AC from the 120VAC panel when the inverter is running. Basically, prevents the ibverter from trying to run the front AC.
As most of you know, you can't run a DC relay with AC power, the relay will chatter & heatup. Don't know why a DC relay was used...
To smooth out the AC, a 1/2 wave rectifier (two diodes & capacator). I believe it was the capacitor, about the size of my pinkey! When 1st plugged in that capacitor would charge, this was tripping the GFI!!!!!
What I did to correct is install a FULL WAVE rectifier (just 4 diodes)
did not spell check! LOL
Issue Resolved.