I am installing an electric stovetop. The one I removed had 4 wires.. red, black,white, and bare copper. The new one has 3.. black, red, and bare.. from what I have read here, the old system is a 220v/110v system... I assume that I hook up red to red, black to black, bare to ground. How should I deal with the 110v leg. Should I just put a cap on it? Do I need to disconnect it at the box? :confused: