Keeping this in consideration, how does a 3 position selector switch work? Selector switches use cams in combination with contact blocks to provide a wide range of circuit openings and/or closings. In the figures below, a 3 - position selector switch is used to open or close two circuits, "hand" and "auto", for a pump application.
How do 3-way switches work?
Here are the basics of a 3-way switch: Just to be clear, a 3-way switch never really turns on and off. It simply diverts power from one wire to the other – much like a railroad might switch a train from one track to another. Get the picture?
What are the different screw terminals on a three-way switch?
There are three screw terminals on the body of the switch, in addition to the green grounding screw. One screw, known as the common, is a darker color than the others. The other two screws, usually a lighter brass color, are known as the traveler terminals. A three-way switch has four different screw terminals on its body:
How do you turn on the lights on a 3 way switch?
Flipping just one of the 3-way switches should do the trick and turn on the lights. Let’s operate the switch on the right. Power can now flow through traveler wire T2 and the light goes on! (Flipping the switch on the left would have given the same result of turning on the light.)
Where is the grounding screw on a 3 way switch?
For safety, always install a three-way switch that has a grounding screw. It is connected directly to the metal strap of the switch, and it may be located on the bottom of the switch, as shown here, or it may be on the side or another location.
What does a 3 position switch do?
Three-way switches are commonly used to control a light fixture from two different locations. For example, a long hallway or stairway might use a pair of three-way switches at each end so that lights can be turned on when approaching one end of the hall or stairway, then shut off from the other end.Sep 10, 2021
How do you wire a 3 position selector switch?
3:195:08How To Wire 3 position selector switch to stacklight - YouTubeYouTubeStart of suggested clipEnd of suggested clipThe center position with contacts. I added a second normally closed contact and put a jumper betweenMoreThe center position with contacts. I added a second normally closed contact and put a jumper between the two normally closed contacts. You can see with the meter. This is how it works.
How do you test a 3 position switch?
0:573:50How to Test and Replace a 3-way Switch - YouTubeYouTubeStart of suggested clipEnd of suggested clipNow I'm going to test the switch. See if it's working properly. I've continuity now between thisMoreNow I'm going to test the switch. See if it's working properly. I've continuity now between this common and this traveler.
How do you test a selector switch?
Push in on the button of the switch terminals that you are testing. Touch an ohmmeter probe to each terminal. The ohmmeter reading should change from infinity to zero ohms. Keep each probe in contact with its terminal and press in on a different button, releasing the first button.