I am planning to run a new circuit to install ceiling lights, fan, etc. My attic is very low (approx 3 feet), and there is insulation between the joists (B in picture), so it is going to be a hassle to drill a hole in each one to run the cable through and under the insulation. I have a roof joist (A in picture) that is under the peak of the roof. I would rather run the cable along that, but I'm not sure if there are any issues with doing this. Is this a good idea?
P.S. I am in Seattle, so almost no lightening storms.
P.P.S. This is not my roof, but it is very similar. Except it isn't insulated.
Best Answer
If there's no permanent ladder or stairs leading to the attic, you may be able to simply lay the cable across the rafters.
Article 300.4(D) says that if you do attach the cable to the ridge beam, you'll have to keep it 1 1/4" away from either edge.