I'm looking for some help to learn the right way to upgrade the power going out to my detached garage. Currently I have a 25x25 2-bay garage with power fed from what appears to be a single 15A breaker in the house. There is no sub-panel in the garage, just a handful of lights and outlets. I'd like to do a major upgrade, so that I can have Level-2 electric car charging OR a welder plugged in out in the garage, I don't foresee the need to ever need both at the same time. I have the charger, but not a welder yet. I'm assuming this will go on a 40-50A breaker of its own. The good news is the house is currently setup with a 200A service and I am not taking full advantage of all that power in the house.
The image below shows my current situation;
- Blue = Home fuse panel, 200A
- Orange = Existing power entry to detached garage, from the side wall
- Purple = Short concrete apron
- Green = Potential third garage bay expansion
- Black = Existing blacktop
This may be added complication, but I would like to run my power in such a way that I could add a third garage bay someday where the green box is shown. What I don't know is the best route to get it there and what my limitations are in terms of electrical code for locating a subpanel in that corner of the garage. I've been browsing around garage journal, but I feel like I need some basics before I can dive into this one. Any help is appreciated.
