Since the furnace room light switch being turned on is what first caused the AFCI to trip, that is what I investigated first. After finding and correcting a bad splice on the ungrounded feeding the switch there and the trip issue appeared solved, I didn't bother investigating any further. At least on that trip.
The first thing I did today is swap the AFCI breaker with another in the panel. The circuits were not moved, just swapped two AFCIs. I wanted to see if the trip issue moved from crct 7 to crct 11. If so, that would have told me it's a breaker issue.
But as soon as I turned the swapped breaker back on, it tripped. Neither furnace room or bath lights were on.
OK, the receptacles are all back stabbed on that circuit. When you tied on to the existing receptacle, you either put your new wires on the screws or cut and pigtailed two of the four existing wires, leaving two still back stabbed. The act of jostling the receptacle around was enough to loosen the crappy back stabbed connection. The lighting is down stream of that outlet so when the light(s) was flipped on, it caused enough of an "arc" signature across the receptacle that the AFCI kicked it off.
Bottom line, sh!try back stabbed receptacle that hadn't been disturbed in 6 years until you were there.
No, it's more than a toroidal coil. It also has a super re-tarded circuit board that thinks it sees faults where there are none and is completely blind to the actual problems in a circuit.
a ground wire in the light ALMOST touching something and the heat from the light makes it connect? either that or your cousin dave is just messin with ya:laughing:
1. I never claimed to be Steven Speilburg or George Lucas.
2. I don't tap videos. Tapping would be annoying to listen to.
3. No one uses tape any more.
furnace and your BR ckt are mwbc. furnace is a standard breaker. furnace has a control transformer wired hot to ground. neutral to ground current wasn't detected by afci until you fixed the bad neutral splice in furnace light box ?
I am going to have to ask that you find an avatar before posting again.
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