Disposal Switch Wiring Diagram. You can use any kind of switch for your garbage disposal as long as it has set On and Off positions. Switch must be mounted within sight of sink opening or garbage disposal.
The one on the right uses the red wire between light and switch to complete a switch loop to control the light. This is commonly used to turn a table lamp on and off when entering a room. You will be saving money by doing it yourself instead of hiring an electrician.
The gray wire should go down to the lower black GFCI load brass terminal hot by the words Load side of outlet.
Your diagrams for these are very clear understandable and I was very pleased to find them BUT I want to add a GFCI duplex outlet in the 2-gang box with the switch. The one on the left switches power on the outbound disposal cable. Remove the metal plate on the bottom of the garbage disposal. The diagram below shows the power entering the circuit at the grounded outlet box location then sending power up to the switch and a switched leg back down to the outlet.