3 way timer switch

Discussion in 'Electrical Forum discussion & Blog' started by lambed3, Aug 5, 2012.

  1. lambed3

    lambed3 New Member

    Joined:
    Jan 3, 2007
    I am trying to add a digital timer switch to a 3 way configuration. I got the switch to work with one issue, it only works if the 1st switch in the circuit is in the on position. Please note that the other switch is a standard on off switch. If I turn the 1st switch off, I cannot turn the lights on from the digital timer. If I have it on, then the timer works perfectly to control the lights. To make matters a little more interesting, I do not have the more common configuration for 3 way switches. I have the configuration in the attached diagram where one switch flows through the second junction box to the lights. The digital timer is in the #2 position in the diagram below.

    Can anyone help me to get this working correctly? Do I just need a second digital switch or am I SOL to get the timer to work with this setup?

    wiring2l.gif
     
  2. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Joined:
    Sep 2, 2004
    Occupation:
    Retired Systems engineer for defense industry.
    Location:
    New England
    All switches in the circuit must be designed for 3-way circuitry - you can't use a simple on/off switch in a 3-way circuit. The timer you have may or may not be able to work in a 3-way circuit. Without knowing what you have, there's no way to tell you how to make it work.
     
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  4. ActionDave

    ActionDave Electrician

    Joined:
    Feb 4, 2009
    Occupation:
    Electrician
    Location:
    Colorado
    If your wiring at the matches the illustration a digital timer may not work since there is no neutral at either switch location.
     
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