Hi I have NM Romex 12/2 with ground currently running from my panel to a wellhouse and it's setup for 110 which is running one outlet for a light and the well pump. I need to install a new pump but it requires
220v. Assuming I convert my breaker to 220, can I use the existing 12/2 romex for the new outlet in the wellhouse or do I need to run additional wiring?cheers, bigballer