Electrical Wiring for a Garage Workshop
Installing an Electric Panel for a Detached Garage: Electric Codes for a Detached Garage Panel, Can I use a Main Lug Only Electric Panel Load Center for a detached garage?
Garage and Workshop Electrical Wiring
Electrical Question: Can I use a Main Lug Only Electric Panel Load Center for a detached garage?
- 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.
- The project and circuits to be installed are the following:
- I will use two 30Amp circuits, 3 wire + equipment ground, #10 wire, in 3/4″ underground PVC conduit to provide the power to the garage.
- I plan to install a 30Amp load center in the garage with two 20Amp circuit 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, Illinois.
Thanks for your electrical question Jim.
Installing an Electric Panel for a Detached Garage
Application: Installing an Electric Panel for a Garage or Workshop.
Skill Level: Advanced – Best installed by a Licensed Electrical Contractor.
Tools Required: Electricians pouch of hand tools and the various power tools necessary for the specific method of electrical service installation.
Estimated Time: Depends on the type of panel, the location, and available access to the project area.
Precaution: This is an extensive project. Working in an electric panel has shock and arc flash hazards and should be performed by a Certified Electrician or Licensed Electrical Contractor.
Notice: Installing an Electrical Panel should be done according to local and national electrical codes with a permit and be inspected.
Electric Codes for a Detached Garage Panel
Jim, because the garage is detached it would be best to have a main disconnect, however please see the following electrical codes that will apply to your question.
- The panel may not have more than 6 circuit breakers.
- If the number of circuit breakers are more than 6 then a main disconnect is required.
- NEC Electrical Code Reference articles 225.31, 225.32, 225.33, 225.36.
More about Wiring a Garage or Workshop
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Be Careful and Be Safe - Never Work on Energized Circuits!
Consult your Local Building Department about Permits and Inspections for all Electric Wiring Projects.
The Safest Way to Test Electrical Devices and Identify Electric Wiring!The Non-Contact Electrical Tester
This is a testing tool that I have had in my personal electrical tool pouch for years, and is the first test tool I grab to help identify electrical wiring. It is a Non-contact tester, [amazon.com], I use for the detection of Standard Voltage in Cables, Cords, Circuit Breakers, Lighting Fixtures, Switches, Outlets and Wires. Simply insert the end of the tester into an outlet, lamp socket, or hold the end of the tester against the wire you wish to test. Very handy and easy to use.
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