3 Prong On Off Switch Wiring. Connect the last switch in the usual manner looping the wire around the screw in a clockwise direction. When it is off then the center terminal is connected to the other prong on the switch.
Spst toggle switch wiring. Connect the last switch in the usual manner looping the wire around the screw in a clockwise direction. Some have a continuous on position located on either side of a center off position.
Note if terminal 3 ground was not connected the switch would still operate the fan but you would not get illumination.
This translates into the following model in a real life rocker switch. If you are going to drill a hole to mount the switch check behind it before you drill into something. Note this is just an illustration of how the switch works. The additional terminal is at terminal 8 and controls the top light in the switch called an independent light.
