Garbage Disposal Electrical Wiring Diagram


By Dave Rongey - Summary:

How to Wire a Switch and Outlet for a Garbage Disposal: Disposal wiring diagrams with pictures for wiring the outlet.


Switched Outlet Wiring for a Kitchen Garbage Disposal

Electrical Question: I am going to install a garbage disposal outlet (1/2 hot, 1/2 switched) and switch. Your diagrams for these are very clear, understandable, and I was very pleased to find them BUT, I want to add a GFCI duplex outlet in the 2-gang box with the switch. This GFCI will feed the disposal outlet but will not be switched. How do I incorporate this additional outlet to your disposal diagrams?  Or an alternative set up would be to wire the un-switched outlet (in the 2-gang box) so that it will feed through to the disposal/switched + hot outlet under the sink?
Thank you!

Background: Jeff, a Handyman from West Des Moines, Iowa.

Dave’s Reply:
Thanks for your electrical wiring question Jeff.

How to Wire a Switched and Outlet Wiring for a Garbage Disposal

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 avaiable 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.

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3 Responses to “Garbage Disposal Electrical Wiring Diagram”
  1. Dave Rongey says:

    Hi Thomas, The garbage disposal is typically controlled by a wall switch which is located near the kitchen sink, therefore the wiring for the garbage disposal outlet may be identified using a circuit tester to see which wire is controlled by the switch. The neutral wire of the circuit power will also need to be identified as well, keeping in mind that the two wires of one cable may be used to loop the power up to the switch and then returning back to the outlet box. Please see the wiring diagrams for garbage disposals which describe the two most common methods of wiring a garbage disposal controlled by a wall switch.
    I hope this helps you,
    Dave

  2. Thomas says:

    On the outlet under the kitchen sink for dishwasher and garbage disposal there are two set of wires, one coming for the left and one from the right, how do I identify the wiring for the garbage disposal?

  3. Troy says:

    How do wire a disposal from a wall plug that already has the dishwasher already wired off the same wall plug