I'm adding onto a 220v circuit that I installed a few years ago. I knew I would likely want a 220v outlet in my garage, the current circuit runs 4AWG to a spot 5' from the garage wall. It currently runs a mini oven/range in my guest kitchen (30A).
The immediate needed in my garage is a 5A rated electric motor, but I want to be able use it for a 50A welder that I1 might buy in the future.
Since there are numerous 220v, generally differing in amp ratings, I'm not sure what to use for the new outlet/plug. Do I use a low amp plug & outlet now and add another high amp outlet whenever I get a welder? Do I install a 50A outlet and plug now and be done?
Also, the circuits breaker is currently rated for the 30A range load. I assume the full 30A would only be used if all 4 burners and the oven were heating simultaneously. (Probably never has been done since I installed it 10 yrs ago) Are there any safety issues with keeping the 30A breaker, or do I need to install a 35A one immediately?
FWIW, my property is not legally required to follow code, but safety is a high priority. I follow code unless there is an edge case where code makes no sense.
The motor's nameplate specs:
Best Answer
You should wire in a sub-panel at/near the "guest kitchen" (current terminus of the 4Ga wire.)
That sub-panel would be where you move the present 30A breaker to, for the outlet feeding the stove (only.) You feed that sub-panel with a breaker suited for the wires feeding it (copper being higher than aluminum for the same size) and the temperature rating of the wire insulation or terminals (whichever is lower rules.)
The sub-panel should have adequate space for the 30A breaker for the stove, a 15A breaker (circuit for your 5A motor) and a 50A breaker (circuit for your 50A welder.)