Open Ground question

[DBECHEN]

Hi all, I have been having a problem with plugging into the shore power at our storage facility. They have all circuits run through GFCI outlets on the pole. When we plug in and we are not running anything the GFCI trips on the pole. We talked to our storage facility manager and they had an electrician come out and he said the issue was our RV having an open ground. We have a Progressive Industries surge protector that was installed by the first owner. When we plug into the 30 amp plug at our house and in campgrounds there is no problem. Any ideas what may be causing this? Thanks in advance.

[Tom_Barb]

If it works every where but there, I would suspect there.

there is a cheap little tester for GFI circuits get one and test the storage facility.

It depends upon if the facility is using the white wire as a common ground or if they are using the bare copper to a ground post as the common ground.

tester

https://www.homedepot.com/p/Sperry-GFCI-Outlet-Tester-GFI6302/301961462?cm_mmc=Shopping%7CTHD%7CG%7C0%7CG-VF-PLA-D27E-Electrical%7C&gclid=EAIaIQobChMI-MD94ofF2AIV3LjACh2C1gC3EAQYASABEgI_gPD_BwE&gclsrc=aw.ds&dclid=CITfoOiHxdgCFVGSfgodCUIJxw

[DBECHEN]

I have plugged it into several different outlets on separate circuits at the storage facility and it pops the GFCI’s on all of them. When I plug in at my house it is into a 30 amp outlet not a standard plug. I have tried several adapters taking it from 30 amp to 120 volt outlet and it is the same result.

[ScottG]

Of course you have an open ground. Your ground isn't supposed to be bonded and none of that matters anyway. A GFCI doesn't trip because of an "open ground".
Somewhere, you have a leakage to ground. Could be a wet outside receptacle, bad fridge heater *even if it works fine) or water heater or even a bad microwave (rare). I would unplug the appliances and see if the fault remains.

[Farmboy666]

Have you tried plugging anything else into the gfi just to make sure it’s not bad, like a radio or a light? If you never had trouble anywhere else it’s either the gfi or something has changed since last time it was plugged in elsewhere. Be easier if you new exactly what the electrician tested.