I don't claim to be an engineer, or scientist, or profess to have a firm grip on the 'insides' of an AFCI. When there is a 'bad connection' that generates heat, which further deteriorates said 'bad' connection, is there not an 'arc' (series arc)?? Is it less than the threshold of the AFCI cbs?
As I said above, I have seen 'burned' wirenuts over the years, and did attribute that to workmanship, be it a 'bad' splice..or a combo of a bad splice and a circuit loaded to the max.
BTW, this new item is still being developed, and is not on the market yet. Think about the elusive AFCI device!!
