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I have a garbage disposal that is plugged into a 15A outlet on a 20A GFCI protected circuit. The circuit is wired with 12 gauge wire. For the switch I would like to install to control the 15A outlet for the garbage disposal I have 2 questions:

  1. Should the switch be 15A or 20A?
  2. Which wire (12 or 14) should be used to run between the outlet and the switch?

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If the breaker is 20A, the wire and switch must be 20A rated. So 12 AWG wire. 20A switch.

"15A outlets" are a special case, and are all rated for being used on 20A protected circuits.

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