Both low and high voltage wiring has been completed upstairs. I’m a bit of a geek when it comes to wiring (and maybe a few other things), so I went a little overboard on the TV and data cables. We don’t really have any intention of having a TV upstairs, but we all know it’s easier to do it now than it is to do it later. We ran coax for TV and two CAT5 cables to five different jacks spread around upstairs. They all will feed into our media box in the basement and be used to connect TV, phone and data, as necessary.