On September 15, 2019 at 05:24, thecapnredfish said...
It is immediately upon plugging in. Distancing fridge from GFCI through use of test cord or plugging into a outlet fed off GFCI located elsewhere results in not tripping. Odd.
Did you inspect the outlet by removing it from the J-box? Is it possible that the line is connected to the load terminals?
Check the resistance between each conductor at the GFCI that trips, with the previous device in the line.
