House Fan Switch Wiring Diagram Dpdt. Suggested electric fan wiring diagrams converting a 12 volt switch into a ground switch these diagrams show the use of relays onoff sensors onoff switches and onoff fan controllers. It shows what sort of electrical wires are interconnected and will also show where fixtures and components may be coupled to the system.
Most dpdt switches use three terminals because there will be a high speed low speed and common wire hooked into them. The 2 coil terminals is where the voltage is placed in order to energize the coil. The purpose of the center off position is to bring the gearmotor to a complete stop before reversing its direction of rotation.
Nothing here should be confused with the latest generation of pwm variable speed controllers which have much higher technology such as a soft start feature and.
Basically what billb said. Turn off the branch circuit from. There are just two things which are going to be found in almost any 2 speed whole house fan switch wiring diagram. Dpst rocker switch wiring diagram what is a wiring diagram.