Installing A Sub-Panel In A Detached Garage
July 20, 2006
Q: I have a detached garage approximately 35 feet from my house. I want to install electricity to it but, I’m not sure how much. How many volts should I install?
A: The voltage is just part of the question. You need to determine what you want to do in your garage to determine the amperage.
If you only plan to use it for hobbies then you probably only need one or two 120 volt circuits at 20 amps and GFCI protected.
If you plan to do any welding or need a larger air compressor I would install 220 volts at 100 amps.
The biggest thing you need to do is plan what you intend to do in your garage and then install power that exceeds your plans.
Installing a 100 amp sub-panel will allow for plenty of future changes or additions, but it will cost considerably more than installing a couple of 120 volt / 20 amp circuits. However, the 120 volt circuits do not allow for any future growth or changes.
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