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Electrical Wiring for a Garage Workshop

   
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Installing Electric Wiring and a Panel for a Garage or Workshop. I will use two 30A circuits, 3 wire + equipment ground, #10 wire, in 3/4″ underground PVC conduit and plan to install a 30A load center in the garage with 2-20A breakers.


Garage and Workshop Electrical Wiring

Electrical Question: I intend to electrify a detached garage, which is about 60 ft. from the house panel. The Power needs will be convenience outlets and lights for a workshop. I will use two 30A circuits, 3 wire + equipment ground, #10 wire, in 3/4″ underground PVC conduit and plan to install a 30A load center in the garage with 2-20A breakers. Can I use an MLO or Main Lug Only Load Center or do I need a Main Disconnect as well?

This electrical question came from: Jim, a Property Manager from Urbana, IL.
See more about Home Wiring for Illinois

Dave’s Reply:
Thanks for your electrical question Jim.

Garage Electrical Panel

Jim, because the garage is detached you will need a main disconnect.

As with any electrical project, all work should be done with a permit and inspections.

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Consult your Local Building Department about Permits and Inspections for all projects.

Comments

2 Responses to “Electrical Wiring for a Garage Workshop”
  1. John Engel says:

    You will need a main disconnect for the load center or panel you will install. The easy way to do this is with a convertible Main lug Main breaker setup. This is more expensive than putting in a 30 Amp load center, but it is safer and will be code compliant. Why are you just putting 2 20 Amp circuits in the garage? You are not leaving any room for upgrading the amperage. I would install a 60 Amp circuit to the garage that should take care of your needs. The #6 AWG wire will cost you about .88 a foot, but you will have enough amperage for an electric heater if you use your garage in the winter. Hope this helps you.

    • admin says:

      Excellent advice John,
      Thank you for your addition to this article. It is so very important to plan for any future circuits. The panel will be rated for a larger service, so it would be well to take advantage of that and run a larger feeder to provide more amperage.
      Dave

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