A friend of mine had a receptacle on an outdoor circuit clearly arcing whenever he put a load (pressure washer) on a downstream receptacle of that circuit, to the point that you could visually see a flash every time he turned on the pressure washer.
I think that GFCI receptacle was probably wired badly to cause the arc, and should be easy to replace and wire correctly. But my bigger question is why didn't the AFCI breaker trip here?
A local electrician said something along the lines of "AFCI breaker doesn't work here because the arc is on a neutral", but this doesn't make any sense to me since, IIUC, an AFCI breaker is supposed to monitor the circuit between both hot and neutral and look for weird waves.
Is there something I don't understand about AFCIs, or is this a simple case of a bad breaker that need to be replaced?