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Electrical Wire and Cable

How to Wire a New Dishwasher

Wiring Connections for a New Dishwasher: How do I connect the electric wires for my new dishwasher?

Dishwasher Electrical Wiring
Electrical Question: How do I connect the electric wires for my new dishwasher?

I am installing a new replacement dishwasher at home. The instructions for electrical hook up state to connect black wire to black wire, white wire to white wire, and green grounding wire to green grounding wire. BUT the old dishwasher had a black wire, a white wire and a copper grounding wire. The copper grounding wire was connected to a grounding screw in the dishwasher junction box (ie. NO green grounding wire). So with the new dishwasher should I connect the copper grounding wire coming from the wall to the green grounding wire in the junction box or to the grounding screw which is attached to green wire on the dishwasher? It’s kind of hard to see on the picture of the dishwasher junction box – but the screw which I think is the grounding screw is visible on top left which has the dishwasher’s green grounding wire connected to it.

This electrical wiring question came from Mike, in Concord, Massachusetts.
See more about Home Wiring for Massachusetts

Dave’s Reply:
Thanks for your electrical wiring question Mike, here’s your electrical answer, enjoy your new dishwasher!

Wiring Connections for a New Dishwasher

electric wiring a dishwasher

Application: Electric Wiring for a Dishwasher.
Skill Level: Intermediate to Advanced – Best performed by a Certified Electrician or Electrical Contractor.
Tools Required: Basic Electricians Pouch Hand Tools and Voltage Tester.
Estimated Time: Depends on personal level experience and ability to work with tools.
Precaution: Identify the circuit, turn it OFF and Tag it with a Note before working with the wiring.
Important: Burnt or damaged wiring and circuit components should be replaced with new electrical materials of the same voltage and amperage rating.
Notice: Installing or Replacing a Dishwasher should be done according to local and national electrical codes and installing new or replacement electrical parts or equipment may require to have a permit and be inspected.

Making the Electric Wire Connections for a Dishwasher

Dishwasher Junction Box Wiring and Circuit Cable or Cord

Electrical Wiring Hook Up for a 120 Volt Dishwasher

Example of Alternative Grounding Methods for a Dishwasher

IMPORTANT NOTE: When correctly grounding the dishwasher, the circuit ground wire will be properly bonded to the metal frame which will then enable the dishwasher components to be properly grounded.

More about Wiring a Dishwasher

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FAQs Frequently Asked Questions and Comments

2 Responses to “How to Wire a New Dishwasher”
  1. kyle says:

    The electrician wired my dishwasher, which is on its own circuit and GFCI. The wires are black, white and red. Which is the ground wire?

    • Dave Rongey says:

      Hi Kyle,
      Home electrical wiring includes a ground wire which is typically a green or bare copper wire. If the wiring is located inside a metal box then the ground wire should be attached to the box with a green grounding screw. If you cannot locate the ground wire you may want to contact your electrician and ask him where the circuit ground wire is.
      Be safe,


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