joe wrote:I replaced the outlet I plug my portable EVSE (the one that came with the car) into outside because the old one kept overheating, according to the lights on the device. The outlet I replaced was (apparently) not rated for outdoor use, wrapped in electrical tape, and surrounded by some sort of cocoon or similar insect manifestation. (The people who built this house were not very good.)
I replaced it with a 20A outdoor-rated GFCI outlet, and now, every time I plug the J1772 connector into the car after plugging the EVSE into the outlet, the 20A breaker that the outlet is on trips. If I reset the breaker with the car plugged in, everything works fine. No similar problems with the previous outlet, which would charge the car for a few hours before over-heating.
What's up with that?
Is it only the EVSE that trips it? Have you tried something like a shop vac to see if it trips?
Was the previous outlet a GFCI? If not, is there another GFCI outlet on the same circuit (they can be wired to protect all outlets "downstream" on the circuit and more than one on the same circuit will cause issues).
I assume the replaced outlet was also 20A, the breaker is 20A and the wire for the circuit is 12 ga? If not, these could also cause problems.
Even cheap outlets are generally rated "weather resistant", but code now requires a weatherproof "box type" cover that shields the plug and receptacle when devices are connected.
The old style "grey flaps" no longer meet code.
And it is also possible that the GFCI you installed in defective. I've had more than one that was bad out of the box.
A circuit tester might be a good idea. Your local big box store should have one similar to this:https://smile.amazon.com/Sperry-Instruments-GFI6302-Receptacle-Professional/dp/B000RUL2UU