I had a question and I was hoping you guys can help. I am installing a new ceiling fan. There is a receptacle directly below where I want to install the switch for the fan. I was going to pigtail into the receptacle. When I removed the receptacle, there were 2 wires coming in both 12-2. After seperating them to find out which was the hot wire coming in, I discovered both black wires coming into the box were hot. Can I still pigtail into one of these. If so how? The house was built in '97.