I want to add a second outlet to my finished garage ceiling, about 14 feet from the existing box. The DIY info I found has all been about adding wires to finished walls.
The question is how to get past joists in the ceiling. If these were studs, then I would put a pumpkin cut in the wallboard next to the stud and drill a pass-through hole in the stud. I wouldn't expect any significant weakness to be added. But I think the ceiling joist may be different, since these joists appear to be part of a truss and are under tension. (Probably not a lot, but I want to be code compliant when I make holes.) I don't know the dimensions of the joists, but I'm guessing 2x10 or 2x12. The picture below shows construction over a much smaller room, where I had a pinhole leak in the pipe.
If I were to do this so it complies with construction and electrical codes, what codes would I be looking for? Apart from that, what is the recommended method for passing the wire through or around the joist in a finished ceiling?