05:15PM | 07/01/06
Member Since: 06/30/06
3 lifetime posts
I have two light switches in one "box". One controls a light and the other controls the fan. The two use the same wire on one pole (serial connection?). I have successfully installed a new switch for the light but cannot get the Intermatic fan-timer switch to work. There are four connections in the switch -- red, white, black, and green. I have the black wire (which is also connected to the light switch), the red, and the white wire connected together. For the other two wires, I have black-to-black and green-to-ground. When I turn on the fan, it phases in and out operating at a lower speed than when I used the regular toggle switch. I have tried all types of combinations but none of the others would give power to the unit. I have already replaced the unit and the same thing happens with the new timer switch.

While I am somewhat handy, I am not an expert on home wiring. Are there any thoughts or suggestions?



06:12PM | 07/01/06
Member Since: 04/25/05
1915 lifetime posts
You did not give a model or part number, but I am guessing that it is a EI200 series timer.

That requires a neutral connection.

Also you did not indicate what wiring was in the switch box.

If there are only 3 wires (plus any green or bare ground wire) then what you have is a switch leg, which consists of a hot, and the switch hot to the light and switched light to the fan.

There is no neutral so you can use the electronic switch.

You can use the FD series "windup" timers. You can get with with ranges from 5 minutes to 12 hours. For a bath fan probably want a 30 to 60 minute timer.

If you have more wires than the 3 tell me what wires (and cables or conduits) that you have and what was connected to what in the old switches.


07:21PM | 07/01/06
Member Since: 06/30/06
3 lifetime posts
I have an Intermatic E1200C Countdown Timer Switch. There are three cables coming into the box. The light switch is connected to one black wire, a ground and another black wire which is then connected to the fan switch. The fan switch has another black wire coming into it. The three white wires (one from each of the three cables) are connected to each other but not to any other switch/device. Both switches are grounded separately.

For the timer switch, I have the one black connected to the black wire, the other black connected to the switch is connected the the red & white wires. The green is connected to th ground.

Any additional advice would be greatly appreciated. Thanks in advance ...



08:27PM | 07/01/06
Member Since: 04/25/05
1915 lifetime posts
The cable with the black wire that connect to the two switches is the power supply hot.

It connects to the light switch and the black on the timer.

The red on the timer connects to the black going to the fan.

HOWEVER, the white on the timer needs to connect to the neutral. That is to the bundle of bundle of 3 white wires.

This is just like figure 2, expect in your case you have the 2nd switch and cable.

You might need a larger wire nut to connect all 4. Check the package for the number and size of wires that it will handle.


07:03AM | 07/02/06
Member Since: 06/30/06
3 lifetime posts
Thanks ... your recommendation worked!



06:42PM | 12/18/17
Desperately seeking help to get a bathroom fan timer installed. The box wiring in the wall has 3 black wires going to the light switch, one red, white and black (black also attached to switch, which I assume is the power, “hot” wire) the fan timer has 3 wires, black, which I attached to the “hot” wire on the box, red and green. I attached the red to the red in the box and the green to a single white wire. In the box is also four white wires attached together and two black wires attached together.
This fan is also controlled by a fan switch located on my main floor. The box I am referring to is my master bedroom’s washroom.
I am attaching a picture. Please help!
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