a friend of mine just replaced an electric cooktop in his kitchen. As he was taking it apart, he recorded the electrical configuration as follows: 4-wire: blk/red/grn/wht and a 240/30a/60hz circuit The new cooktop is a 3-wire (red/blk/grn). I asked him how he hooked it up and this is the answer I got: 1. I (he) wired the appliance end to like colors (red-red, grn-grn, blk-blk). The white conductor he left detached, put a wire nut over it and taped it... 2. The panel end, he replaced the 30amp breaker with a 40amp breaker (as needed by the new cooktop). 3. He then traced the white conductor to the bus bar, detached it, and taped it, then tucked it into the panel. I wasn't sure if you could wire a 3-wore device on a 4-wire cable... So I went over there to check shit. Lo and behold, the white conductor lights up as hot when I wand it... It goes off when I kill the breaker tho. Thoughts?