I am replacing a double wall oven. The previous oven had the neutral wired into the uninsulated ground, since there was only the two hots and the ground available from the house. I understand that that used to be allowed, but not any more. I have an outlet (20A) for a microwave in the same cabinet that is not currently being used (but I might use it in the future). Can I pull a neutral from that box into the 220 circuit for the oven? (Both the box and the oven have 12 gauge wire for the neutral.) If I do, can I still use the outlet for a microwave at some later date? Should I disconnect the hot from microwave circuit from the panel? Thanks!