Dimmer Switch - 3 Wires

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Old 04-01-18, 06:06 AM
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Dimmer Switch - 3 Wires

Can someone help me figure out how to replace my standard single switch with a dimmer switch? From what I can tell, the current setup has an extra wire (note 3 black and 3 white, instead of what I expected which was 2 black and 2 white). I believe there is only 1 switch for the 1 light and no associated outlet in the room, so what is the extra wire for? I tested the fuses and the closest electrical outlet is on a different fuse than the light, so where is the third wire passing through to? Do I simply need to attach the third wire to the red dimmer wire marked as (3-way), even though its not?
 
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Old 04-01-18, 06:48 AM
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Hi, simply remove the old switch which should have 2 conductors on it and install the dimmer to those 2 wires.
Geo
 
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Old 04-01-18, 08:21 PM
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Welcome to the forums.

Your three white wires should be combined and wire nutted.
Your switch most likely has screw terminals and push-in connection. Someone used the lazy man connection and used both the screw terminal and push-in at the same time.

The black circle shows two wires. One on the screw and one pushed in. They are connected inside the switch. These would be a hot wire to the switch and one to something else along the line. The red circle is a wire by itself. This would be the load wire to the light.

You'd connect the two blacks together and go to one of the dimmer wires.
The single wire is the other connection.

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