Run Romex Through Attic Roof Truss Web

Cable run across the top of joists.

Run romex through attic roof truss web.

Protecting the cable is as simple as installing substantial guard strips which can simply be a 1x2 furring strip on each side of the cable if there s no permanent stairs or ladder this protection only has to be provided to. While this article focuses on configurations we also have a very cool set of illustrations showcasing the different parts anatomy of roof trusses. The carpenter told me i cannot drill these trusses to run my romex. I hope i did not mess up.

If the attic is accessible by permanent stairs or ladder any cable running across the top of joists will have to be protected. I have already drilled 7 8 holes in the trusses. Romex electrical wiring running over the roof joists in attic all of the upstairs wiring is running over the roof joists instead of through them. I am installing some led lights in my shop and don t want to drill holes into the floor joists in order to run the romex.

A pull down attic ladder does not count. I know in a basement they have to be run through the joist if smaller than 8 3 or 6 2. I want to install an attic ladder and i understand that code implies that electrical has to be run where it will not be under foot. So i thought an attic would be no different.

The second floor of my shop is built with attic trusses which integrate the floor joists with the truss. Romex is running perpendicular to. The nec requires you to install romex following along the framing lumber or along running boards. An attic that is accessible which is defined by the nec as having a permanently installed stair or ladder in place must have protection for any cables that run across the top of the attic floor joists or within 7 feet where they run across the face of rafters or studs.

You are not allowed to clothes line from truss to truss with an open truss design.