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Old 10-23-2009, 12:06 AM   #1
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Wiring an Intermatic Wall Timer in a three way switch


I am wiring an Intermatic St01 wall switch timer into a three way switch. I am having a difficult time trying to figure out the wiring with the switches that I have. I have attached several photos of the two switches.

The first switch is the one that I am replacing with the timer. It is in the center of two others. There are three black wires and one white wire attached to the switch. Two of the black wires are attached to the bottom right of the switch. One of the black wires is attached to the upper left of the switch. The white wire is attached to the upper right side of the switch.

The second switch shows a black a red and a white. The red wire is attached to the switch marked "common". The black and white wire are attached as shown.

Timers instructions are not very clear. I found a pdf version of them here:

http://www.intermatic.com/~/media/fi...20english.ashx

I know this is a tall order but can anyone help me out with the wiring of the timer and the conversion of the second switch?

Thanks in advance!
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Wiring an Intermatic Wall Timer in a three way switch-img_0205-1.jpg   Wiring an Intermatic Wall Timer in a three way switch-img_0208.jpg   Wiring an Intermatic Wall Timer in a three way switch-img_0210.jpg  

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Old 10-23-2009, 03:54 AM   #2
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Wiring an Intermatic Wall Timer in a three way switch


I have installed these ST01 Timers and like them, but I have not done a three-Way install.

Suggestions:


.
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Old 10-23-2009, 07:18 AM   #3
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Wiring an Intermatic Wall Timer in a three way switch


Piece of cake.

At the 3-gang box, remove the 2 black wires that are together on the same terminal, and attach them both to the black wire of the timer with a wire-nut.

The other black wire should attach to the blue wire of the timer. Attach the white wire to the red lead of the timer.

At the remote switch, remove the black wire from the back of the switch, and connect it to the screw terminal with the red wire. Leave the white wire alone.

This should do the trick.
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Old 10-23-2009, 07:29 AM   #4
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Wiring an Intermatic Wall Timer in a three way switch


deleted charged.

Last edited by AllanJ; 10-23-2009 at 07:35 AM.
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Old 10-23-2009, 09:29 PM   #5
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Wiring an Intermatic Wall Timer in a three way switch


Thanks KBSparky! I wired it just like you said and it works perfectly!
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Old 10-24-2009, 12:22 AM   #6
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Wiring an Intermatic Wall Timer in a three way switch


You're welcome
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Old 07-23-2011, 11:43 AM   #7
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Wiring an Intermatic Wall Timer in a three way switch


Hi - I am having the same issues with wiring my timer switch into an existing 3-way circuit.
Switch #1 has two blue wires connected to each side of the switch on the bottom and a red on the top left screw.
Switch #2 ALSO has two blue wires connected to each side of the switch on the bottom and TWO red wires connected to the top left screw.

Can anyone help?

Thank you in advance

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