I need to convert an outlet to 230V 15A for a window AC. Unfortunately the outlet is on the second floor, outside wall of a solid brick house.
I’m considering punching a hole through the back of the cavity behind the box to run the new line. It would then be conduit from there down the side to near the electrical panel where it would re-enter the house.
Is this safe and reasonable? What kind of conduit do I need?