the AFCI won't work on a multimire branch circuit, such as a 12/3 run to the attic to feed a couple of bedrooms, etc. It senses the imbalance between the ungrounded and the nuetral. If you are using existing circuits, why are you arc faulting ?Are you bringing something up to current code? If you run new circuits, the AFCI will work fine for lights and receps. as long as it is a 2 wire cicuit. Nothing comes to mind about the smoke being on it's own, but there maybe a stipulation for it in the Firm Alarm code.the code section on AFCI also says all Outlets in the room. def. of an outlet is: a point on the wiring system at which current is taken to supply utlization equipment. sounds to me like they want everything in the room arc faulted.
