Uhh....what happened to the fact that multi-wire branch circuits are now history? Anyway you look at it either build or retrofit that increases costs....
don't forget about the size of the AFCI's and additional heat they produce.
Ob
PS I have already had some trouble with AHJ here on service upgrade. Seems he could not under stand why a K&T circuit would keep tripping the AFCI on 1 job and again on a multiwire branch circuit(14/3 Rx)Both occations cost me several hours labor to meet and explain.
Speedy Petey, I think ausador is just referring to not being able to share the neutral on AFCI circuits. Such as, not using 3-wire for two AFCI branch circuits.
