Wall oven, on its own circuit. The cooling fan that runs after the oven is turned off just started tripping a GFCI receptacle on a separate circuit, on the adjacent countertop. Specifically, when the fan kicks off.
Nuisance tripping. Replace the outlet.
That’s the plan…it’s from a 3-pack of the Menard’s store brand. I should have known better.
Still can’t wrap my head around the connection to the oven, though.
The fan is seperately fed. It’s fed from the load side of the gfci.
No, it’s on the same supply as the oven, split off the 240 internally. There are two recepts on the load side, but they were empty at the time.
Inductive loads (anything with a motor) can dump a large voltage spike into a circuit when shutting off. (The motor’s magnets store energy, and all of this is released as the magnetic field collapses when the motor is turned off.)
Normally, this isn’t a big deal, but if a GFCI is faulty, it can cause tripping, even if they’re on adjacent circuits. (Remember that everything is ultimately connected to your bus bars in the main panel.)
Hard saying. I once lived in a house where turning on a closet light would trip the GFCI in the bathroom. It was maddening.
I did wonder if it could be something like that. I know that things with motors do interesting things to circuits, but I thought that it was really odd unless the receptacle was faulty…which I suppose should have probably been my first guess!
One of my way-out-there theories laying awake in the middle of the night last night was that the motor was creating a magnetic field that was interfering with the fluorescent light over the cooktop, right by the oven, that is plugged in to the GFCI itself. But then I remembered that it still happened after I unplugged it, so no.
Well I swapped out the recep with a good one from The Depot. Used the oven for dinner, and it didn’t trip…but one from the same package as the orignal, on the other countertop circuit did, right in synch with the fan! That one also had a couple nuisance trips in the past, I had associated it with the heating elements from either the coffee pot or toaster oven, but now I guess there’s another option.
Replacing that one tomorrow, and taking all 3 from that package back to Menard’s where they can shove them.