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
Home Electrical Codes
- Electrical Code Directory covering electrical boxes, electrical circuit, electrical code outlets, electrical grounding, electrical services, electrical underground, and electrical wiring methods.
- Garage Electrical Wiring
- Garage electrical wiring diagram and considerations for wiring garage circuits, complete with pictures.
- Careful planning for your garage with immediate and future equipment considerations will help you understand how to size your electrical circuit requirements.
- This information will help as an garage electrical wiring guide.
- House Wiring Circuits and Circuit Breakers
- This article looks at common 120 volt and 240 volt house wiring circuits and the circuit breakers that are installed identifying the types and amperage sizes used in most homes.
- Electric Circuit Listing
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- Electrical Wiring Protection using Circuit Breakers
- A guide to home electrical circuit breakers and how they work to protect your electrical wiring.
- When properly installed, your home electrical wiring is protected by a circuit protection device.
- Electrical Wire for the Home
- Complete listing of electrical wire types and parts used for home projects with electrical code information serves as selection guidelines.
Be Careful and Be Safe - Never Work on Energized Circuits!
Consult your Local Building Department about Permits and Inspections for all Electric Wiring Projects.
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