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Electrical Wire and Cable

Grounding Electrical Outlets in a Garage

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: I am running MC cable (3/8-1/2″) into handy boxes in series around my garage wall.

Background: Chris, a Handyman from Dover, TN.

Dave’s Reply:
Thanks for your Electrical Wiring Question Chris.

How to Ground Electrical Outlets

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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.

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Wiring 3-Wire and 4-Wire Electric Range
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2 Responses to “Grounding Electrical Outlets in a Garage”
  1. Kevin says:

    I just bought a hot tub and was having some ground issues. I was wondering how to ground the outlet that the hot tub is plugged into. It’s already plugged into a receptacle in my garage which gets all its power from the breaker box in my house. I was troubleshooting and found that if I push the outlet back against the garage siding where it is and put the cover back on it the hot tub will give off a charge. If I pull the receptacle out and plug it in so it isn’t touching anything, then there is no shock from the hot tub. So….. how would you ground that receptacle?

    • Dave Rongey says:

      Hi Kevin,
      Most hot tubs require a dedicated circuit which is not shared with anything else. So if that is the case with your hot tub you should check the specifications and have a dedicated circuit installed with GFCI protection as described in the installation manual.
      As for the garage outlet that is causing a charge and shock hazard I would highly recommend turning off the circuit that supplies power to the outlet. The outlet should be removed so the electrical box and securing hardware may be inspected for improper installation and loose or faulty wiring connections. If the circuit wiring includes a ground wire then make sure the termination of the ground wire to the outlet is correct. Keep in mind that accessible outlets in the garage should have ground fault protection, and this can be accomplished by installing a GFCI circuit breaker, or by installing one or more GFCI Outlets.
      I hope this helps you.

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