I just ran a circuit for a 30 amp 240 V A/C unit. The GC and crew intalled the unit. It has an AFCI on the cord. As soon as it is plugged in, the AFCI trips and won't reset. My question is, can the cord mounted AFCI detect an upstream fault? Or is it just for a fault in the unit and cord?
Not that I think I have a fault, the circuit is 40 feet in pipe with #10 THHN. There is only one splice and I checked it. I pulled a ground to the junction 6 feet away from the unit, then used the pipe from there since it is indoors with set screw connectors. I jumpered to the receptacle. The ground tests fine at the unit, altho I don't think it would matter anyway to the AFCI.
I just want to be ready in case the GC blames my wiring. Thanks........B
