garbage disposal wiringWhen you buy a new garbage disposal, it generally will not come with a new cord. That leaves you to buy a new cord, or use the cord from the old garbage disposal. Whichever you choose, you will have to wire it into the new disposal.

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You will need to turn the disposal upside down and remove the small coverplate, which is held with one screw. Under the plate are a black wire and a white wire. You will also see a green grounding screw.

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There is also a knockout where you will thread the cord through (sometimes it needs to be removed and sometimes it has already been removed for you). You will need a cable clamp to hold the cord in place at the knockout so that it can’t move and get damaged by the edges of the metal. Thread the cord through the clamp, but I generally don’t tighten it until I’m finished.

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Connect the green or bare copper wire to the green grounding screw. Connect the ribbed wire from the cord to the white neutral wire in the disposal, and connect the smooth cord wire to the black hot wire in the disposal. Connect the wires with a wire nut and gently push them into the disposal’s base, and then reinstall the coverplate.

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