I have a 1940’s Cape Cod house, and am working on updating my kitchen. Currently the kitchen has a garbage disposal, and no dishwasher. I am going to be installing a dishwasher, and want to have it plug into the same receptical under the sink, which I understand is most commonly done. The current wiring going to the disposal is old, and will be re-wired when I install the dishwasher. I also want to make sure it meets the current 2017 NEC.
I have been doing research, but I can not get a definite answer. Here is my understanding. If anything is wrong, please correct me.
- The garbage disposal and dishwasher each require 12/2 wire. To run wire from the panel to the outlet, I can use 12/3 wire.
- A 20A, 120V, 2 pole circuit breaker should be used, one breaker for the dishwasher and one for the disposal. 2 pole, so if a repair is needed at the outlet, both circuits are turned off, for safety.
- One split-tab receptical is placed under the sink. This receptical should have the tab broken on the hot side, and the tab should stay connected on the neutral side.
- One single pole switch, for the disposal. 12/2 wire can be ran from the switch to the receptical.
Here is my confusion.
I have read that all Kitchen recepticals are required to be AFCI protected. Also, that all recepticals within 6 feet of the kitchen sink needs to be GFCI protected.
Where do you place the AFCI and GFCI? My understanding is that both are required. I also understand that you can install them at either the breaker or the receptacle. Do you install the AFCI at the circuit breaker, and the GFCI at the receptacle? Or, I have read that there are circuit breakers that do both AFCI and GFCI, although, I have not found one that does 2 poles. I’m a little lost as to where these fit into the complete circuit to meet the current codes.
Please help me understand what I am missing. I believe I understand how to wire each item together, but it would not hurt to double check that as well especially since it may change with where the GFCI and AFCI would go if they are required.