I would like to install a receptacle under the sink to control the dishwasher and garbage disposal, with a single pole single throw switch mounted in the wall above the counter top to control the garbage disposal.
In the load center I would like to use a 20 amp GFCI breaker to power the circuit.
I'm using #12/3 romex to feed the circuit.
My question is, would it be better for me to replace the garbage disposal with a unit that has an automatic sensor that activates the disposal when the plug is inserted or turned rather than going to all the trouble of mounting a switch on the wall.
Since the dishwasher and disposal don't run at the same time and the full load amps are less than 14 amps on either appliance, I'm thinking I can just use a 20 amp GFCI receptacle and save on the GFCI breaker.
I would really like a professional opinion on which way proceed.
Electrical – use a receptacle and switch for a dishwasher and garbage disposal
electricalwiring
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Best Answer
If you're using 12/3 with ground, non-metallic sheathed cable from the panel to the outlet, you'll have no problem doing what you want.
Materials:
Procedure:
Pull the cable
Install the switch
Install the receptacle
Install the breaker
Turn on and test the GFCI breaker
If the breaker will not switch on, there is a ground-fault, the wiring is wrong, or the breaker is bad. Detect and correct the fault, and reset the breaker.
tl;dr
Here is an image showing what the finished circuit should look like.
Click for larger view
NOTES: