But if you have knob and tube running in an attic or exterior wall the space can not be insulated until the wiring is replaced.
Running wires without attic.
On a single story home or the the upper floor of a multiple story home this means accessing your attic to run wire.
Totally hidden existing knob and tube wiring meets code and we have left it in place inside some interior walls.
Run the wire or cable to its destination.
Attempting the job without preparation and taking the proper precautions can cost you time or money and can even be a serious safety hazard.
Watch the entire process step by step.
Use thwn 2 14 gauge stranded wire if you get power from a 15 amp circuit or thwn 2 12 gauge stranded wire for a 20 amp circuit.
When romex is run across rafters in an open unfinished attic it is my position that a raceway of some kind 1x3 s or even 2x4 s should first be attached across the affected rafters perhaps 3 to 4 above the joists then the wiring be stapled to the raceway.
You ll need two wires one white and one black for one circuit or more if you intend to wire a three way switch from the house or add more than one circuit.