Something interesting happened to me today. I was reconfiguring my basement floor layout since the Christmas tree is down and I have more room. I replaced one of my 1' straight pieces with a USA Trains 4' small turnout to make a parallel spur. When I tried to run the train, I blew the fuse on my Aristocraft trackside unit. I replaced the fuse and tried again. Same thing happened. I switched out the fuse and replaced the straight piece and everything was fine. Since I smelled burning wire, I looked at the underside of my switch. The plastic coating had melted and the wires were touching. The switch had been on the layout for months with no trouble in its original position. In the new position, it was one section away from my powerr hook up. I use a Power G unit running through the Aristo track side. I don't understand how just moving the switch caused the wires to melt and the switch to short out. Any thoughts? What did I do wrong?