Blown GFI when using shore power

[Scout1]

When I plug into shore power using 30 amp circuit I get no AC in trailer. If I use the 20 amp circuit the GFI breaks. Any ideas out there of what my problem could be?

[gator.bigfoot]

Are you sure your 30 amp plug has power and is wired correctly? What 20 amp gfi trips? The one you're plugging into or one in your trailer?

Please show some pictures of what you're plugging into and your AC breaker box.

I'm assuming your main breaker is on if you have one. Please measure the voltage at the source and let us know what it is.

[Scout1]

Thanks for reply. I found answer under another post. When I plugged trailer into a 15 amp plug at campground GFI went off. What I didn't realize is that it also tripped in the camper, so when I tried the 30 amp plug I got no current in camper. Reset my GFI, plugged in at home from non-GFI protected 20 amp circuit, and all is well.