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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.

  • As per the electrical code, the disposal does not need to be on a GFCI protected outlet because the outlet is not accessible because it is located under the sink.

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  • Serves a dishwasher and a garbage disposal.
  • One very important element can be easily overlooked as you will see in these pictures.

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

FAQs Frequently Asked Questions and Comments

One Response to “Garbage Disposal Electrical Wiring Diagram”
  1. Troy says:

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


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