+ Reply to Thread
Results 1 to 5 of 5
  1. #1
    Join Date
    Nov 2008
    Posts
    3

    Default Changing single pole switch to 3-way

    I am finishing a basement. Currently, the light on the landing and in the basement is controlled by a single pole switch at the top of the stairs. A 14-2 wire comes from the box to the basement light where a 14-3 continues to the switch. From there to the landing light is another 14-3. Current continues there to the rest of the circuit. How can I change this to a 3-way with a switch at the base of the stairs with a minimum of rewiring?

  2. #2
    Join Date
    Jan 2010
    Location
    Northern Virginia
    Posts
    1,215

    Default Re: Changing single pole switch to 3-way

    Hi,
    You need to buy some "3-wire" and two three-way switches. Install the wire between the two switches using the handy wiring diagram on the box.
    S_M
    Remove not the ancient landmark, which your fathers have set.

  3. #3
    Join Date
    Jun 2007
    Location
    Fayette County, Ohio
    Posts
    5,846

    Default Re: Changing single pole switch to 3-way

    You will need to run a new 14-3 from the switch box to the new switch box. Connect the always hot on the old switch to the "C"terminal on the replacement 3 way, connect the white and red wires of the new 14-3 to the "T" terminals on the replacement 3 way, wire nut the switched wire from the old switch to the black wire of the new 14-3. In the new switch box connect the red and white wires to the "T" terminals on the new 3 way, and the black wire on the "C" terminal of the new 3-way.

    Jack
    Be sure you live your life, because you are a long time dead.-Scottish Proverb

  4. #4
    Join Date
    Nov 2008
    Posts
    3

    Default Re: Changing single pole switch to 3-way

    Thanks for your help. In your scenario, could I connect the existing 14-3 that runs from the downstairs light to the existing switch to the new switch if I moved the 14-2 coming from the breaker box to there as well? Or would this put the entire circuit on the switches? Also, if I did that, how would I wire the basement light controlled by the switch? The only reason I ask is that the existing switch is in a difficult position to run new wire without tearing out existing drywall or ductwork.

  5. #5
    Join Date
    Jun 2007
    Location
    Fayette County, Ohio
    Posts
    5,846

    Default Re: Changing single pole switch to 3-way

    Unfortunately no. The circuit you described is using the leads of the 14-3 to feed
    power and common as a feed trough in the circuit and the 3rd. wire as a switch leg.
    It will probably require some blocks cut out of the drywall to feed the wire and then drywall patching. Done properly this is not a big or complicated task.
    Jack
    Be sure you live your life, because you are a long time dead.-Scottish Proverb

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •