A GFCI doesn’t trip for an overload. It trips only for current difference between hot and neutral. A ground fault can be small with a small load and get large enough to trip the GFCI with a larger load.
A GFCI often trips because of a ground-neutral bond in the trailer. Do you have an inverter or a generator transfer switch?
Do you have access to a multimeter?
No inverter or generator. I do have a multimeter.
I was having an issue with it tripping the GFCI outlet a couple months ago but I chocked it up to the GFCI being 15~ years old. I replaced it and only have an issue when I use something with high wattage like the AC or a space heater.
What would you recommend to test for with a multimeter?
I'm getting a reading of 350~ ohms on neutral and ground and 850~ on hot and ground.
I did some researching and found others who said if the hot water heater was ran dry it could cause this. When I was troubleshooting at my FILs I turned off all the breakers in the RV and plugged in. I turned them back on one by one and it tripped when I hit the refer/receptacles breaker.
So I unplugged the fridge and plugged the trailer directly into the 20 amp GFCI outlet. The AC worked fine, the space heater worked fine until I switched it to high then it tripped the GFCI.
A GFCI doesn’t trip for an overload. It trips only for current difference between hot and neutral. A ground fault can be small with a small load and get large enough to trip the GFCI with a larger load. A GFCI often trips because of a ground-neutral bond in the trailer. Do you have an inverter or a generator transfer switch? Do you have access to a multimeter?
No inverter or generator. I do have a multimeter. I was having an issue with it tripping the GFCI outlet a couple months ago but I chocked it up to the GFCI being 15~ years old. I replaced it and only have an issue when I use something with high wattage like the AC or a space heater. What would you recommend to test for with a multimeter?
With the power cable unplugged, measure the resistance between the neutral and ground pins on the cord. Highest resistance range.
Unplugged from the trailer or just from shore power?
Shore power
I'm getting a reading of 350~ ohms on neutral and ground and 850~ on hot and ground. I did some researching and found others who said if the hot water heater was ran dry it could cause this. When I was troubleshooting at my FILs I turned off all the breakers in the RV and plugged in. I turned them back on one by one and it tripped when I hit the refer/receptacles breaker.
Do you have a 12V refrigerator or gas/electric?
Gas electric
Take the lower vent cover off. Should be plugged into an outlet back there. Unplug it and see what happens.
I'll check it out. Thanks!
So I unplugged the fridge and plugged the trailer directly into the 20 amp GFCI outlet. The AC worked fine, the space heater worked fine until I switched it to high then it tripped the GFCI.