3 Way Switch Screw Colors. The darker terminal is known as the common connection of the switch. Three-way wall switches are most commonly used to control a light fixture from two locations, such as from both ends of a hallway or stairway.
Not all three-way switches have these terminals placed in the same configuration, so you have to pay attention to their colors (and the instructions that come with the package) when wiring them.
When working with three way switches.there is no left side wire or right side wire or top or bottom wire there is ONLY one constant. there is one screw colored darker on the switch.
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3-way or Three-Way Switch Maintenance and Troubleshooting
How To Wire A 3 Way Switch - Wiring Diagram
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How to wire switches
I have a three way switch which has a green screw and a black screw and three brass I don't know which one is which. I placed the two black wires on the top portion (both copper colored screws) and the red wire on the black screw. White wires can, from time to time, be used as ungrounded (hot) wires (though they're.