My feeling is these products exist when they are proposed but they are not through the testing/listing phase yet. I know Harvey Johnson (Cuttler Hammer)had a prototype AFCI in his garage at least a year before the first proposal was sent to NFPA. I gave him one of my old Tektronics 453 scopes and a current probe to play with. He was looking at different types of arc signatures. I think his son was working at the lab but Harv was working from his home in beautiful downtown Estero Florida.
I would love to hear Harvey's opinie on the afci, especially after a decade of evolution Greg
~S~
