I'm installing a disposal and am wondering how I can control the GFCI that the disposal is plugged into with a switch. I want the switch to control the GFCI outlet to protect the disposal. Thank you.
If this is a new outlet run take all 3 wires to the switch box the white wire nutted together white to white. The ground you will want to pig tail a ~6" piece to the switch green screw. The black is put on the switch (I usually put the hot on top) and feed the outlet on bottom. Just an FYI Garbage disposals are notorious for eating GFCI's so it may be a good idea to have a spare (just be aware that this can happen).