sub panel help
I have a 220 line from a range that was used prior to us installing a gas range. It's a 50amp line that is now unused. I would like to use that line to feed a sub panel that would allow me to add two circuits for a swimming pool plus a circuit or two for a hobby area in my basement.
The problem... the range line has two hot wires and one neutral, no ground. I can't easily pull another wire because the main panel is in a closet in the finished area of the basement with no easy way to pull new wire. So, how can I get a fourth wire over to where I want to put my new panel?
The previous owner converted the electric water heater from electric to gas, so I also have a 220, 30amp feed left over from that... Can I convert the hot lines from that into grounds and extend them over to the new sub panel?
Any other ideas?