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Electrical Wiring for a Dishwasher and Disposal Outlet

   
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How to Wire a Dishwasher and Garbage Disposal Outlet: The Most Common Problem with Dishwasher and Disposal Outlets and How to Fix Them


Guide to Wiring a Disposal Switch and Outlet and How to Fix Them

Electric Wiring Question: I am replacing the switches and receptacles in the kitchen.

  • While replacing these devices, I’ve managed to lose power to the dishwasher.
  • The disposal, which is plugged into thee top or bottom of a receptacle, gets electricity, but the dishwasher which is  plugged into the same receptacle, does not.
  • I did not change the receptacle under the counter so I’ve mis-wired somewhere above the counter.
  • I have the following electrical above the counter:
    • Light switch.
    • Garbage disposal switch right of sink.
    • GFI line right of sink and GFI Load and Line left of sink.
  • The dishwasher is right of sink as well.

This home electric wiring question came from: Lisa, from Seattle, Washington.

Dave’s Reply:
Thanks for your electrical question Lisa.

How to Wire a Dishwasher and Garbage Disposal Outlet

Application: Wiring a Garbage Disposal Switch and Outlet.
Skill Level: Beginner to Intermediate – Best if wired by a Licensed Electrical Contractor.
Tools Required: Basic Electricians Pouch Hand Tools and a Voltage Tester.
Estimated Time: Depends on personal level experience, ability to work with tools, the location of the garbage disposal outlet and the available access for the electrical wiring.
Precaution: Identify the outlet circuit, turn it OFF and Tag it with a Note before working with the wiring.
Notice: Installing additional outlet wiring should be done according to local and national electrical codes with a permit and be inspected.

The Most Common Problem with Dishwasher and Disposal Outlets and How to Fix Them

  • Wiring a Disposal Switch and Outlet

    • My first thought about this question is that you should swap the dishwasher and the disposal plugs, because there is a good possibility that the wiring for each of those plugs has been changed up at the disposal switch at the counter top location.
    • In most cases, the garbage disposal and dishwasher are on the same electrical circuit, each of which are plugged into the duplex receptacle outlet which is located under the sink.
    • As you will see on the visual wiring diagrams, there is a duplex receptacle with two outlets under the sink. One of the outlets is controlled by the switch at the counter top to operate the garbage disposal.
  • Wiring a Dishwasher Outlet

    • As described in the same wiring diagram, the other outlet of the duplex receptacle under the sink remains hot all the time for the dishwasher.
    • To help you understand how the wiring of the garbage disposal and the dishwasher I have placed links to the visual wiring diagrams below.

Wiring a Garbage Disposal
dishwasher-disposal-wiring

Garbage Disposal and Dishwasher Wiring

  • Fully explained dishwasher disposal and wiring diagrams with pictures for wiring the outlet that serves a dishwasher and a garbage disposal.
  • One very important element can be easily overlooked as you will see in these pictures.

How to Wire a Switch
electrical-switches

Wiring a Light Switch – Diagram 1

Wiring Diagrams

  • Fully Explained Light Switch Wiring Diagrams. Detailed Electrical Wiring Diagrams and Pictures assist your Home Electrical Projects.

Wiring GFI Outlets

GFCI and GFI Wiring Diagrams

  • The features and benefits of GFCI outlets and receptacles will give you a clear understanding of the importance why these safety devices are required by code to help protect you and your family against accidental electrical shock hazards.

GFCI Wiring
GFCI Wiring

  • This list of articles will help you learn about the features and benefits provided by GFI and GFCI Receptacles and how they are wired.

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Learn How to Wire it Right with my
Complete Guide to Home Electrical Wiring
Perfect for Homeowners, Students,
Handyman, Handywomen, and Electricians
Includes:
Wiring GFCI Outlets
Wiring Home Electrical Circuits
120 Volt and 240 Volt Outlet Circuits
Wiring 3-Wire and 4-Wire Electric Range
Wiring 3-Wire and 4-Wire Dryer Cord and Dryer Outlet
Troubleshooting and Repair Electrical Wiring
Wiring Methods for Upgrading Electrical Wiring
Electrical Codes for Home Electrical Wiring
....and much more.

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