Installing Electrical Power to a Shop from a Garage
Installing a Sub Panel to another Electric Panel: I have built a new shop close to my garage and would like to install a over head cable to the garage and for a new panel in the shop. How do I connect to the electrical power in the garage breaker box.
Wiring a Sub Panel for an Shop or Outbuilding
Electrical Question: I have built a new shop close to my garage and would like to install a over head cable to the garage and for a new panel in the shop. How do I connect to the electrical power in the garage breaker box
- I have a small garage that I ran 100 amp, single phase under ground entrance cable to.
- It comes off the meter base thru a 100 amp breaker to the garage and into a Square D 100 amp breaker box.
- I have just built a new shop within 20′ of this garage and would like to install a over head entrance cable between the garage and the new shop picking up the 100 amp service from the garage taking it to a 100 amp Square D breaker box in the new shop.
- My question is how do I tap into the 100 amp service in the garage breaker box and be within code.
This electrical wiring question came from Mark, in El Reno, Oklahoma.
Thanks for your electrical wiring question Mark.
Application: Installing a Sub Panel.
Skill Level: Intermediate to Advanced – Best installed by a Licensed Electrical Contractor or a Certified Electrician. This is Not Recommended for Homeowners.
Tools Required: Electricians Tools including pouch of hand tools and the various power tools necessary for installing the sub-panel.
Estimated Time: Depends on the type and size of the panel and available access to the project area.
Precaution: Any existing electrical wiring within the immediate area that may interfere with the installation of the sub panel should be identified and turned OFF and Tagged if necessary. Working in an electric panel is dangerous due to arc flash hazards and the possibility of electric shock.
Notice: Installing additional electrical wiring should be done through the local building authority, installed according to applicable local and national electrical codes, with a permit, and have the required inspections.
Installing a Sub Panel to another Electric Panel
- The New Panel
Connecting a sub panel to an existing panel is typically done by installing a new circuit breaker into the existing panel. The feeder cable to the new panel is then connected to the new circuit breaker.
- Panel Wiring
Because the panels are not the main source of electrical service, neutral conductor and ground wire separation must be configured as well.
- Main Breaker Disconnect
Keep in mind that the number of circuit breakers that are at each panel will determine if a main breaker will be required as a service disconnect.
More about Wiring a Sub Panel
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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 Code Articles for Home Wiring
Electrical Code Directory covering AFCI circuit, electrical-boxes, electrical-circuit, electrical-code-outlets, electrical GFCI, electrical-grounding, electrical-project, electrical-services, electrical-underground, electrical-wiring, electrical-wiring-code, lighting-code, and smoke-detectors.
Electrical Codes for Services
Be Careful and Be Safe - Never Work on Energized Circuits!
Consult your Local Building Department about Permits and Inspections for all Electric Wiring Projects.
Wiring a Switch for an Air CompressorWayne asks:
I am wiring my 240volt air compressor using 10/3 to a lighted 30 amp switch to place by exit door to turn off when im away.
My question is: when I wire the switch I will have essentially two hots, do I place both the black and red on one screw and the black and red on the other?
Also its the lighted Leviton 3032-plr, a lot of the comments say I need to use the neutral to operate the light.
I dont know what to do with that.
Thanks for your help.
Wayne, The Leviton 3032-plr switch that you have described is for 120volt applications and will not work on a 240volt circuit.
A typical 240 volt air compressor requires two hots and a ground wire.
A neutral wire is not required.
A 120volt lighted control switch could be wired as an add on control circuit, however this would require a separate 120volt control circuit, a 120volt lighted switch, and a 120volt control relay with 240volt contacts rated for 30amps.
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