Run Romex Through Attic Roof Truss Web

Cable run across the top of joists.

Run romex through attic roof truss web.

I understand that this is what the code says but obviously the romex is. Only 1 5 required from roof sheeting. So i thought an attic would be no different. I think some folks are thinking you mean knob and tube wiring since you said exposed.

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. 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. 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.

A pull down attic ladder does not count. I have already drilled 7 8 holes in the trusses. 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. I cannot find this specifically in code so here is my question.

If the attic is accessible by permanent stairs or ladder any cable running across the top of joists will have to be protected. 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. 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. I hope i did not mess up.

It is using 2x4 roof trusses. I took it to be the cable romex was going to be exposed. Same as vertical studs. 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.

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 know in a basement they have to be run through the joist if smaller than 8 3 or 6 2. This will protect the wiring from being accidentally snagged. 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.

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.