I am renovating my bathroom. I am bringing in new circuits for all the electrical, and replacing the boxes.
I will have no problem capping off/removing the live (black) knob and tube wires in boxes.
However, I won't be able to cut the neutral/white wires back to boxes easily (they drop down from distribution boxes that are inaccessible in the 4" "crawlspace" between the ceiling joists and the roof rafters. Thank you, 1938).
Since they aren't carrying any power/voltage, is it OK to just cut them and leave them in place? Possibly adding a note so that the next guy knows what's happening? It's not ideal, but I have no other idea how to cut them back to a box without ripping out a lot of original plaster.
Best Answer
I think it's very common to leave disconnected knob-and-tube wiring in the walls. Leaving a note sounds like generally a greate idea, but I didn't understand where you intended to put the note.
I think the most important thing is to label the circuits going out from your distribution panel so it's clear which circuits still have knob-and-tube wiring. If you know where the active knob-and-tube wiring is (physically), that would be great to document, too. It will come in handy if you ever consider blown-in insulation.