I'm rewiring part of my house to get rid of knob and tube. I found a weird situation:
- A light socket in a stairwell has two wires: incoming hot and outgoing hot to upper switch.
- Upper switch has 3 wires: incoming hot from light, outgoing two travelers.
- Lower switch has 3 wires: 2 incoming travelers from upper switch, 1 outgoing neutral.
The neutral is spliced in some random joist bay and is the last remaining active piece of a big section of wiring that I'm otherwise ready to get rid of. This lower switch is 25 ft away from the bottom of the stairs, for some reason.
If I were to prune back these travelers and neutral, could I run them to a new switch closer to the base of the stairs? I know that new knob and tube is not allowed. I would do all splicing inside of boxes, and new wiring would be all romex. But the travelers and neutral would be coming into this box from separate locations, as is currently the case.
Is that code compliant? Is it safe?
My alternative is to tap into a nearby box and run all new romex, leaving only the incoming hot at the light fixture, capped off. I'm sure this is better, but is it necessary? It's a lot more work.