Run Romex Through Attic Roof Truss Web

Cable run across the top of joists.

Run romex through attic roof truss web.

Just as there are many types of roofs with many roof parts there are many different types of roof trusses this extensive article explains through a series of custom truss diagrams the different truss configurations you can use for various roofs. 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. The second floor of my shop is built with attic trusses which integrate the floor joists with the truss. 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.

You are not allowed to clothes line from truss to truss with an open truss design. If the attic is accessible by permanent stairs or ladder any cable running across the top of joists will have to be protected. The nec requires you to install romex following along the framing lumber or along running boards. I have already drilled 7 8 holes in the trusses.

A pull down attic ladder does not count. So i thought an attic would be no different. Romex is running perpendicular to. 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.

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. Can i run romex on the underside of the joists with cable staples every 24 inches. I hope i did not mess up. 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.

It is using 2x4 roof trusses.