On a bit of a related side-topic, one of the best ways to wire things up in your studio (if you can) is to shield the audio cables in flexible aluminum conduit.
Then keep any electrical cable outside of this tubing. Another approach that you will hear is to make sure that your power cables cross your audio cables at a 90 degree angle. All of this is to help keep electrical interference out of your recordings and playing.
In a condo I used to own, I also did this in my main living room since that had my big screen and surround sound system. If you look at the picture below, you'll (barely) see a flat piece of wood going up the room corner behind the TV which then joins with the crown molding that goes around the top corner between the walls and the ceiling. Behind the crown molding you would find the exact setup I mentioned above: Audio cables inside flexible aluminum conduit with power cables outside the conduit.