Running Wires Without Attic

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Running wires without attic.

Totally hidden existing knob and tube wiring meets code and we have left it in place inside some interior walls. Attach the wire or cable to a fish tape or coat hanger using electrical tape and feed it into the hole until it reaches the opening at the other end. On a single story home or the the upper floor of a multiple story home this means accessing your attic to run wire. 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. Attempting the job without preparation and taking the proper precautions can cost you time or money and can even be a serious safety hazard. 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. If you re working from the attic you can drop a weighted string down wall cavity then attach the wire to the string and pull it through.