Run Thhn Through Attic

As the cable on exterior become accessible.

Run thhn through attic.

I have a bunch of 12 awg red black white green thhn. I should say thhn thwn 2 wire. My run goes 20 across the rafters in my garage through the wall into the attic runs another 40 across the rafters in the attic and exits the attic through a 2 vent hole under the eaves at the rear of the house into an oversized lb fitting. When cutting through drywall from the interior of a room use a utility knife and cut carefully you don t want to drill through a hidden wire or the paper backing of the attic insulation.

If you drill holes in the joists and run wire through those holes you ll be disturbing the insulation. A favorite target of electrical inspectors is the improper use of non metallic cable nm in exposed locations such as basement foundation walls or along the face of studs and joists in unfinished framed spaces. If the wires are within 7 of the attic access hole or along any attic flooring you ll need to protect the wiring from damage with furring strips along each side of the wire run. From this i.

I have a 20 amp feed on 12 amg romex terminating in a metal 4 x 4 junction box in the basement. If the sites that you want to run wire to are on the outside of the house you should not need to drill a new hole. Once inside the attic i think it s the thhn listing that is being used. The national electrical code which is the basis for all local building codes has specific regulations for installing electrical wires so that they are protected from damage.

The reason i wanted to use the cable is because i already have 75 of it and didnt want to have to buy something else also.