Am trying to find a combined neutral in two 3-wire multiwire circuits. HO had a three melted bare return wires inside of boxes. resulting in a couple of white to box bonds. I am trying protect the wiring with 2-pole afci murray breakers. The circuits trip when one light is turned on it blows both afci breakers, but fine when the one light is not used. My thought is could the light blow both 2-pole afcis or just the shortest wire, this ones got me stumped....maybe lack of good sleep, et.al.
