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Posted by on November 25, 2006, 11:15 pm
Interesting topic...
[Furious01 u563550]
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farseer wrote:
> Hi,
>
> I have a big problem i hope someone may be able to help with. This is
> a bit complicated, so please bear with me while i explain the layout...
>
> I have a three-way switch that controls three lights (one light is
> located downstairs by the entrance, and the other two are just up the
> stairs from there...the 2nd floor hallway). The first switch is
> upstairs and the second is downstairs. The down stairs switch is
> located next to two other switches, each on a different circuit
> breaker.
>
> Everything was working fine...until i attempted to install some
> dimmers. I had accidentally used the source from a different circuit
> for the second three way switch (i connected it to the common of the
> 2nd switch). Need-less-to-say, when i turned the breaker back
> on...BOOM! The main breaker tripped. Ok, so i got a new swtich and
> this time correctly installed it (travels to the 2nd switch and common
> to light fixture wire). I CONFIRMED that 120V is leaving the 2nd
> switch heading towards the downstairs light fixture. The problem is,
> now none of the lights work. No current seem to be flowing to the
> light bulb. Any ideas what happened here?
>
> -Since i know 120v is being sent from the 2nd switch (via the common),
> How can i check continuity between the 2nd switch and the light
> fixture?
> -Is there a way to send a signal of any kind from the switch node to
> the fixture and test if it gets there?
> -Also, what is the proper way measure the voltage of light fixture.
> this light fixture has a bx cable with whith and black wire. The way i
> have been testing using my multi-tester is touching the red probe to
> the black wire, and using the fixture itself as the ground. Is that
> correct?
>
> Thanks for any help you can offer (i am clearly not an electrician...so
> please explain in layman's term).
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