Run Romex Through Attic Roof Truss Web

Nothing in the code book that i am aware for cable run on the bottom of rafters where they are not subject to mechanical damage.

Run romex through attic roof truss web.

Running boards are for cables run on the bottom edge of joists or over rafters when they are subject to mechanical damage less then 3 ft. Ed beal jul 19 17 at 19 08. He is stating that the romex in the attic that is laying on top of the trusses must be secured by a staple tiewrap etc. I think some folks are thinking you mean knob and tube wiring since you said exposed.

The carpenter told me i cannot drill these trusses to run my romex. But we need to know the type of wire and the type of access to the attic scuttle hole stairs to provide a complete answer. I cannot find this specifically in code so here is my question. This will protect the wiring from being accidentally snagged.

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. A pull down attic ladder does not count. 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. It is using 2x4 roof trusses.

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 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. 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. Same as vertical studs.

I understand that this is what the code says but obviously the romex is. If the attic is accessible by permanent stairs or ladder any cable running across the top of joists will have to be protected. Only 1 5 required from roof sheeting. I have already drilled 7 8 holes in the trusses.

I hope i did not mess up. Cable run across the top of joists. So i thought an attic would be no different. I have recently received a notice from one of my inspectors about art.

I know in a basement they have to be run through the joist if smaller than 8 3 or 6 2.