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Ken[_6_] Ken[_6_] is offline
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Default 3-way switches -- old house wiring

Micky wrote:
On Thu, 22 Oct 2015 02:19:42 -0700 (PDT),
wrote:

My situation is a little trickier. When taking off all 6 wires, there's a hot wire at each switch. As I understand it, when the power source is between the switches, only one can be connected to the common. The way it's wired now, one switch must remain in the "on" then controlled from the second switch.


Wired now? I thought you had disconnected the wires.

Without colored wires, the only ones I can identify are the hot wires.


First, make a drawing. Don't expect to remember what you've seen.

Turn off the power and measure the voltage at the hot wires to make
sure you turned off the right circuit.

Then measure the resistance to ground or neutral of the other wires.
The ones that go through the light bulb to neutral should have
non-infinite resistance. Do this with real lightbulbs in the
circuit. I'm not sure what the resistance of other bulbs is.

Mark down the resistance on your drawing.

The ones with infinite resistance are probably just travelers, wires
that went to the other switch, and which are disconnected now.

Get the switches, and try to figure out from the way the wires are
bent, which wires went to which screws, and try to figure out with a
meter, which screw is common and which wires are supposed to be the
travelers. With 6 wires, you should have made a drawing before you
disconnected things .

Look online for various ways to wire a 3-way switch. There are 4 or
5. Use your meter to help determine which method is yours.

Any advice?


http://users.wfu.edu/matthews/course.../switches.html

In addition to what you said, the above link might be helpful to William.