Just looked in my basement and noticed that my contractor has run RG6 coax in parallel, same joist holes, with two 15 amp 14-2 circuit home runs. I have heard that running stereo wire in parallel with electrical wire can cause some kind of signal disturbance, but I have no idea if this applies to shielded coax. The contractor is a friend, and we have a mutually beneficial arrangement, so I don't want to create work for work's sake. However, if this will be an issue down the road, perhaps causing fuzzy picture, poor sound quality, pixelation, etc., I'd rather fix it before we rock the ceiling. I only posted here because I've seen a few serious AV debates among those in the know, so I'd rather start here than join an electrical or AV forum that I'll use once. Also, note that I appreciate that it may not be to code in certain areas to use the same hole, but these are centered in 10" joists, plus 1/2" gyp, so you'd have to have a heck of a nail to spear the cables and introduce 120 VAC into the cable system. That is, I really only need to know about disturbance. Thanks.