What off-the-shelf plug-in devices are available to prevent inductive kickback from reaching the mains circuit?
I have a plug-in Air Conditioner unit (rated 10.8A) on a 20A panel-protected AFCI that works fine, but when the compressor (not the blower) turns off, it trips a 20A GFCI panel breaker on a separate circuit. To repeat, the A/C unit is not on the GFCI circuit, it is on a separate AFCI circuit.
I suspect that inductive kickback into the mains from the compressor turning off is creating enough of a voltage spike on the mains to exceed the breakdown voltage of the NM cable insulation and be detected as a ground fault on the separate GFCI circuit. I believe if I can prevent any inductive kickback from reaching the mains, I think I can prevent this nuisance trip.
Typically, inductive kickback is prevented by putting an RC snubber network in parallel with the switch , but I really need something I can plug in between the A/C unit and the mains to do this. Would a simple surge suppressor do the job , or do I need something more specialized.