Grounding Electrical Outlets in a Garage
How should I ground an outlet to a box? How to Ground Electrical Outlets: Grounding the box and the outlet using a method that works with your wiring and box space.
Ground Wires for Outlets
Electrical Question: How should I ground an outlet to a box?
I am running MC cable (3/8-1/2″) into handy boxes in series around my garage wall. I have one cable entering bottom of handy box and one leaving the top of handy box. How do I ground the box and outlet? the conductors are stranded copper. Do I strip the insulation and wrap around the ground screw on box and use crimp clamps to bond wires and use the tail of one to bond outlet, or do i need to use ring terminals and take all grounds to box ground screw, or wire nut all grounds and use 2 pigtails , 1 to box and 1 to outlet?
Background: Chris, a Handyman from Dover, Tennessee.
Thanks for your Electrical Wiring Question Chris.
How to Ground Electrical Outlets
- As you have described, there are a few options for bonding the ground wire.
- This goal of this task is to ground the box and the outlet using a method that works with your wiring and box space situation.
- Pig tailing is my favorite way in most cases, and the ring tongue or fork spade crimp connectors work best when installing stranded wire, just be sure to use a good pair of crimp pliers.
Electrical Tip for Outlets in Metal Boxes
- Installing 1- 1/2 deep 4-square metal boxes and installing outlets into raised metal industrial covers is preferred because these junction boxes provide more cubic inch space.
More about Garage Wiring
Garage Electrical Wiring
Fully Explained Photos and Wiring Diagrams for Garage Electrical Wiring with Code Requirements for most new or remodel projects.
Electrical Outlet Wiring
Wiring Electrical Outlets for the Home
Home electrical wiring includes 110 volt outlets and 220 volt outlets and receptacles which are common place in every home. See how wiring electrical outlets for the home are done.
For more information about Grounding
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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