Boy I stepped in it this time.
I am remodeling my own kitchen. I decided to group the new wall oven in a cabinet (to be built) with a built in microwave I just bought on eBay.
I have the dedicated 220 wiring already in place for the oven.
The problem is the microwave circuit. My old microwave was under counter and was on a dedicated 110v line, 20A feed by 12ga romex.
The new beast is 1200 Watts and wants a 220V dedicated circuit.
Question. Can I take the existing circuit, go back to the service panel and install a 220v breaker, tape the white wire (say red), and thus convert the 110v circuit to a 220?
If I do this, what size breaker should I install?
Thanks for any advice in advance.