Situation: A 1950s house with some equally old wiring, and some remaining EMT wiring that is being put onto a new QO main svc panel (QO142M200PCAFVP). This is a plug-on-neutral panel. I believe per NEC2017, one is supposed to upgrade all 20AMP or smaller breakers to either GFCI or AFCI (I’m replacing with a combo GFCI/AFCI) when upgrading to a new panel.
One AC/BX cable in-particular (purple circle) which has two 14ga hots and one 14ga (shared) neutral is giving me pause. Back in the day someone went and wired separate circuits onto the separate hots. Each hot serves 3 non-grounded regular 15amp outlets, 2 switched 15amp outlets that were used for lamps, and one has an actual hallway light switch.
I originally put each hot to a separate 15amp GFCI/AFCI breaker (blue oval) and tried to throw the one neutral onto the neutral bar (white circle). This doesn’t seem to work (circuits on those two hots are dead). I believe this is because there is no continuity between the hots and the neutral, as with the new GFCI/AFCI plug-on-neutral breakers, the neutral is supposed to go on the breaker. Does that sound right? I can’t exactly put the one neutral onto one of the GFCI/AFCI breakers, that just doesn’t seem right.
Should I use non-GFCI/AFCI breakers (which was the case before and the two circuits worked)? If so, I would hope that the inspector would allow for this exception to requiring the GFCI/AFCI breakers, as I’m not changing anything on the circuits, just connecting them to a new panel.