I'll be newly wiring a room on the second floor, in this case putting in outlets. The house is old, balloon frame 2x4s, with a double 2x4 top plate that the rafters rest on.
I have 250 feet of 12/2 mc cable that I was going to use to do the electrical that I got from a friend for free.
I am presently planning on running the cable along the rafter ties, down the rafter, through the top plate, and then back up and along to the next outlet. This means two holes in the top plate per outlet.
I'm just a bit uncertain about drilling through the double top plate. These are true 2x4s, but even so, the mc cable has an exterior diameter of around half an inch. That means 5/8 or 3/4 holes. Do two holes of either size present structural concerns that warrant a reinforcement of some kind? I know for notches in the top plate(s), you need to put steel reinforcement on, however I can't find a clear answer with holes of this size. Is there an optimum place to put the holes? In the middle, equidistant from eachother and from the studs?
Any assistance(or general advice) would be welcomed.