CA Traveler wrote:
The AC ground, frame and negative DC are all bonded including the converter frame. The ground fault could be through any of these.
I do understand that - my question would be: with the GFCI only tripping when converter is on - how could power be leaking to ground elsewhere? The only thing it could be is converter with a fault. OTherwise, GFCI would have tripped with converter breaker off as well. DC system has no neutral, obviously, so no place where it would be contacting ground.
I found this:
"In a RV, A common source of this leakage current is the 12 volt convertor, especially the "newer" (post 1980-1990 era) switching type power supplies. These type convertors commonly have input RFI suppression to keep high frequency energy off the incoming power wiring. These filters typically leak several milliamps to ground as there normal function. This leakage current can be high enough to trip a GFCI on the shore power."
