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-   -   1950 switch wiring (http://www.houserepairtalk.com/f9/1950-switch-wiring-8549/)

Staci_25 02-02-2010 08:11 PM

1950 switch wiring
 
1950 wiring- three way switch 2 blues and one orange- what is which!?!?

Wuzzat? 02-02-2010 08:20 PM

Quote:

Originally Posted by Staci_25 (Post 40007)
1950 wiring- three way switch 2 blues and one orange- what is which!?!?

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.
http://www.google.com/search?client=safari&rls=en&q=%223+way+switch%22+troubleshooting&ie=UTF-8&oe=UTF-8
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

Staci_25 02-02-2010 08:25 PM

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

Wuzzat? 02-02-2010 08:28 PM

Quote:

Originally Posted by Staci_25 (Post 40011)
The blues run hot

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.

Staci_25 02-02-2010 08:32 PM

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

Staci_25 02-02-2010 08:34 PM

and I've bee corrected- they're using a multimeter

Staci_25 02-02-2010 08:35 PM

and the cursing has ensued! Hahaha

Wuzzat? 02-03-2010 09:33 AM

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!


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