Knob and Tube

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chris1971

chris1971

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Spoke with the AHJ about knob and tube wiring. We are allowed to cut the wire 1 1/2" past the knob and wirenut and tape up the ends even if the wire is still energized. Has anyone heard of that? I put the capped off ends into a plastic nail on. He stated that that was not necessary to have a box.
 
chris1971 said:
Spoke with the AHJ about knob and tube wiring. We are allowed to cut the wire 1 1/2" past the knob and wirenut and tape up the ends even if the wire is still energized. Has anyone heard of that? I put the capped off ends into a plastic nail on. He stated that that was not necessary to have a box.
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He is correct.
 
chris1971 said:
Spoke with the AHJ about knob and tube wiring. We are allowed to cut the wire 1 1/2" past the knob and wirenut and tape up the ends . . . He stated that that was not necessary to have a box.
Click to expand...
I agree that your AHJ is correct.

Concealed K&T wiring is the only wiring method that is deliberately silent about the splices that aren't at switches and outlets.

The wiring method (concealed K&T) has most of its wire-to-wire splices occuring concealed in the wall (no box of any kind).

What you seem to be describing in your opening post is a dead end of a run that used to go further. The need for a deadend occurs when the scope of work that opens existing finished walls and ceilings is limited and the K&T branch wiring goes outside of the scope of the work.

Given the opportunity, on making a new deadend of an existing K&T conductor, I will tape the end, leaving the end long enough to wrap around the nearest Knob half a turn, and then twisting three or four time around itself, the taut conductor coming from beyond the scope of work.
 
How did they end the K&T runs when they were first installed? I've seen a lot of houses with it, but can't recall ever noticing the end of the conductor.
 
jaylectricity said:
How did they end the K&T runs when they were first installed? I've seen a lot of houses with it, but can't recall ever noticing the end of the conductor.
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Two methods that I have seen are to tape the end of the conductor and sometimes (forget) to put the tape on.
 
jaylectricity said:
How did they end the K&T runs when they were first installed? I've seen a lot of houses with it, but can't recall ever noticing the end of the conductor.
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That's because it wasn't built by Congress. They are the only ones using pork-barrel money to build stuff going nowhere.
 
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