How to hardwire 240 volt electric cooktop. From house conduit is 2 black and 1 white wire. The cooktop has 1 black, 1 red and 1 copper. My old one is from house black to cooktop black, from house black to cooktop red, from house white to cooktop copper. I thought white was neutral, but it is currently connected to ground wire. Not sure I should hardwire the new one the same way.
If the supply wires are in metal conduit, that should presumably supply all the grounding needed. The neutral white wire should be capped off, the bare wire from the cooktop should be secured to the metal box with a #10-32 grounding screw. The locknut on the cooktop conduit adapter is upside down and nowhere near tightened enough.