The basics: Selector switches are generally used to start or stop devices or to switch between electric circuits. They can be turned right, center or left to open or close the electrical contacts. Enabling switches are 3 position (OFF-ON-OFF) and allow a machine to operate only when the middle position is pressed and held. A foot switch, not surprisingly, is a switching device that is operated by the user's foot! If you are looking for Safety Switches, they can be found here.