3 way switch
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A 3-way switch allows lighting to be turned on or off from two separate locations. It uses three conductors to connect two SPDT switches to a light fixture or bulb. The light will be off when both switches are in the same position (both position 1 or both position 2) and on when the switches are in opposite positions, with one in position 1 and the other in position 2 or vice versa.
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3 way switch
- 1. LIGHTING CONTROLS 3-WAY SWITCH
- 2. 3-WAY SWITCH It is a lighting control that can turn “off” or turn “on” a lighting fixture in two different locations. It is called a 3-way switch because there are 3 conductors connecting the switches.
- 3. 3-WAY SWITCH MATERIALS 2 Pcs SPDT switch 1 lamp holder/outlet 1 lighting fixture/bulb Wires 2 Pcs Utility Box
- 4. 3-WAY SWITCH DIAGRAM SPDT SWITCH A SPDT SWITCH B Live Side Lighting Bulb Return Line Conductor
- 5. 3-WAY SWITCH OPERATION • The operation of a 3-way switch is very simple: When the two switches are in the same position –both in position 1 or both in position 2 – the bulb is “off”. When the two switches are in opposite or unlike positions – switch A in position 1 and switch B in position 2 ; or switch A in position 2 and switch B in position 1 – the bulb will turn “on”.
- 6. SWITCH POSITIONS Position 1 Position 2
- 7. Sw A in position 1; Sw B in position 1 Bulb is “Off”
- 8. SW A in position 2; Sw B in position 2 Bulb is “Off”
- 9. Sw A in position 1; Sw B in position 2 Bulb is “On”
- 10. Sw A in position 2; Sw B in position Bulb is “On”