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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.

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Wire It Right with the help of my Illustrated Wiring Book

Great for any Home Wiring Project.

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Complete Guide to Home Electrical Wiring

Perfect for Homeowners, Students,
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Wiring GFCI Outlets
Wiring Home Electric Circuits
120 Volt and 240 Volt Outlet Circuits
Wiring Light Switches
Wiring 3-Wire and 4-Wire Electric Range
Wiring 3-Wire and 4-Wire Dryer Cord and Dryer Outlet
How to Troubleshoot and Repair Electrical Wiring
Wiring Methods for Upgrading Electrical Wiring
NEC Codes for Home Electrical Wiring
....and much more.

Be Careful and Be Safe - Never Work on Energized Circuits!
Consult your Local Building Department about Permits and Inspections for all Electric Wiring Projects.

Electrical Tips to Help You Wire it Right

The Safest Way to Test Electrical Devices and Identify Electric Wires!

The Non-Contact Electrical Tester
This is a testing tool that I have had in my personal electrical tool pouch for years, and is the first test tool I grab to help identify electrical wiring. It is a Non-contact tester that I use to easily Detect Voltage in Cables, Cords, Circuit Breakers, Lighting Fixtures, Switches, Outlets and Wires. Simply insert the end of the tester into an outlet, lamp socket, or hold the end of the tester against the wire you wish to test. Very handy and easy to use.

The Quickest Way to Check for Faulty Electrical Wiring!

The Plug-In Outlet Tester
This is the first tool I grab to troubleshoot a problem with outlet circuit wiring. This popular tester is also used by most inspectors to test for power and check the polarity of circuit wiring.
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Strip Off Wire Insulation without Nicking and Damaging the Electric Wire!

The Wire Stripper and Wire Cutter
My absolute favorite wire stripping tool that I have had in my personal electrical tool pouch for years, and this is the tool I use to safely strip electrical wires.
This handy tool has multiple uses:
The wire gauges are shown on the side of the tool so you know which slot to use for stripping insulation.
The end of the tool can be used to grip and bend wire which is handy for attaching wire onto the screw terminals of switches and outlets..

The wire stripper will work on both solid and stranded wire. This tool is Very Handy and Easy to Use.

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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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