I am going to add a pair of recessed spotlights in my living room ceiling to illuminate a picture over a fireplace. The attic space over the living room is easily accessible. My idea is to tap into an existing wire in the attic for power to the spots. There are about a gazillion wires up there . . . most tied into a switch somewhere in the house. Any suggestions as to how I identify a live wire without actually cutting into it?
TIA