Run Thhn Through Attic

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.

Run thhn through attic.

I should say thhn thwn 2 wire. I am thinking about using it for some indoor wiring projects and i don t know if i need to run in through plastic metal conduit or not. 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. As the cable on exterior become accessible.

I have a 20 amp feed on 12 amg romex terminating in a metal 4 x 4 junction box in the basement. I have a bunch of 12 awg red black white green thhn. Once inside the attic i think it s the thhn listing that is being used. 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.

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 you drill holes in the joists and run wire through those holes you ll be disturbing the insulation. Which is jacketed cable to be run through the attic without conduit because it is packaged together already with a jacket around it they consider the attic to be inaccessible indoor location. Nm through to soffit in non accessible attic junction box under soffit to transition from nm to 10awg thwn grounds crimped thwn in 3 4 metal conduit down to switch or 2 circuit solar load center through the wall into the basement and into the subpanel sized for at least 5760w if using a load center or 3840w if using switch.

From this i.