1950 switch wiring

Discussion in 'Electrical and Wiring' started by Staci_25, Feb 3, 2010.

  1. Feb 3, 2010 #1

    Staci_25

    Staci_25

    Staci_25

    Active Member

    Joined:
    Oct 22, 2009
    Messages:
    36
    Likes Received:
    0
    1950 wiring- three way switch 2 blues and one orange- what is which!?!?
     
  2. Feb 3, 2010 #2

    Wuzzat?

    Wuzzat?

    Wuzzat?

    Well-Known Member Sponsor

    Joined:
    Jan 20, 2010
    Messages:
    2,471
    Likes Received:
    175
    Sounds like the blues are the travelers, but there are many ways to wire 3-ways.
    If you have an incandescent bulb with a pigtail socket and a voltmeter you can run some tests.
    [ame=http://www.google.com/search?client=safari&rls=en&q=%223+way+switch%22+troubleshooting&ie=UTF-8&oe=UTF-8]"3 way switch" troubleshooting - Google Search[/ame]

    [ame]http://www.google.com/search?hl=en&safe=off&client=safari&rls=en&q=3+way+switch+diagrams&revid=864902696&ei=nuxoS9_ELYzRlAfCw-WGCA&sa=X&oi=revisions_inline&resnum=0&ct=broad-revision&cd=2&ved=0CC0Q1QIoAQ[/ame]
     
    Last edited: Feb 3, 2010
  3. Feb 3, 2010 #3

    Staci_25

    Staci_25

    Staci_25

    Active Member

    Joined:
    Oct 22, 2009
    Messages:
    36
    Likes Received:
    0
    prob is that the boys have tried thatand they still can't figure out which to wire to where on the new switch... The blues run hot depending on which way the other switch is flipped
     
  4. Feb 3, 2010 #4

    Wuzzat?

    Wuzzat?

    Wuzzat?

    Well-Known Member Sponsor

    Joined:
    Jan 20, 2010
    Messages:
    2,471
    Likes Received:
    175
    You have to watch out for Phantom Voltages [see Wikipedia] which almost any voltmeter or tester responds to. That's what the incand. bulb is for; it kills phantom voltages.
     
  5. Feb 3, 2010 #5

    Staci_25

    Staci_25

    Staci_25

    Active Member

    Joined:
    Oct 22, 2009
    Messages:
    36
    Likes Received:
    0
    the top switch (the one we're working on) only works if the bottom switch is on and there are 2 spare wires in the box that aren't connected to anything
     
  6. Feb 3, 2010 #6

    Staci_25

    Staci_25

    Staci_25

    Active Member

    Joined:
    Oct 22, 2009
    Messages:
    36
    Likes Received:
    0
    and I've bee corrected- they're using a multimeter
     
  7. Feb 3, 2010 #7

    Staci_25

    Staci_25

    Staci_25

    Active Member

    Joined:
    Oct 22, 2009
    Messages:
    36
    Likes Received:
    0
    and the cursing has ensued! Hahaha
     
  8. Feb 3, 2010 #8

    Wuzzat?

    Wuzzat?

    Wuzzat?

    Well-Known Member Sponsor

    Joined:
    Jan 20, 2010
    Messages:
    2,471
    Likes Received:
    175
    Here's a no-drama way to test this.

    The controlled bulb and the test bulb should be the same wattage incand. bulb.

    Substitute the test bulb for the switch. If the both bulbs light dimly, 'cause they're running on 60v, a hard wire connection or closed switch contacts will not cause problems.

    Try both switch positions and run the test lamp from each blue wire one at a time to the orange wire, four tests total.



    Tracing wires that don't seem to go anywhere is next week's or next month's post!
     
    Last edited: Feb 3, 2010

Share This Page