I am replacing an in-wall oven with a oven/stove. The wiring in the wall is a 2 wire #6, and a ground wire. One of the wires has red arrows on it, the other solid black. (obviously 220V) and I traced them to the breaker box. Both the solid black and the black with red arrow both go into a 50 amp double breaker, and the ground wire goes to the grounding bar.
My stove has a three prong plug: red, black white and ground. With only two hot wires and no neutral coming from the wall, how do I wire the 2 hot and neutral?