I'm adding a 240v outlet to my garage and also want to add a 120v interior and exterior outlet. I've got a few questions concerning code and will just throw out some ideas.
Referring back to this sketch
I'd like to install an outlet where the sketch shows "new interior outlet", and also install an exterior outlet just on the other side of the wall. Can I have 2 junction boxes back to back? I realize it will have to be GFCI since it goes outside. I'm thinking about having the exterior outlet be 240v to have an extra charging point in case I can't fit 2 cars inside the garage.
My electric service runs through a 200 amp main breaker.
I'd like to run a 40 or 50 amp 240v outlet from the ceiling of the center of the garage. I would run 6 or 8 awg wire for this. Although my Prius can easily charge at full speed on a 15 amp circuit, I'd like to future proof the outlet in case I sell the Acura and get an EV.
Am I allowed to run romex through the same hole in the breaker panel as the ground wire? I notice that all of the existing wires run in double strands through holes in the top of the panel, but the ground wire is by itself.