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genner 03-10-2009 02:21 PM

3-way motion sensor
So my goal is to have two separate motion sensors trigger two lights at the same time when one of them senses motion.

There seems to be some posts about it but never really a solid wire hook up.
I'm looking for a wired solution, not wireless as I hate having the idea of having the batteries run out without know it.

There was one post in this forum that suggested just go wire black to black, red to red, and white to white.
Then there's other threads that speak of feedback from the other sensor that triggers from motion.

Then another question is do they make a 3-way outdoor motion sensor switch? Like the indoor ones? Also can you somehow make the indoor 3-way motion switch to become outdoor by sealing it with silicone?

joed 03-10-2009 02:34 PM

First you need to find your sensors. Then determine how to wire them according to the directions. The linked sensors are not wired the same as three way switches. They aren't really called three way motion sensors.

genner 03-10-2009 04:53 PM

So I plan to get two these...I wire them according to their colors to the other motion sensor?

AllanJ 03-10-2009 05:24 PM

This should work.

You could take two regular motion sensor units. Run a 14-3 cable between them. Connect the hot feeds of both of them to the black wire. Connect the neutrals to the white wire and to the light fixtures. Connect the switched hots to the red wire and to the light fixtures.

The maximum load of the lights is limited to the maximum that one of the sensor units can handl.

genner 03-10-2009 06:00 PM

ok so feedback from one motion sensor to the other when motion is triggered shouldn't be of concern right?

Wildie 03-10-2009 07:03 PM

If it were possible to buy a 3 way motion sensor, the first one activated would turn on the lights and then the 2nd one activated would turn them off! Don't think that this what you have in mind!
As has been suggested, they are wired in parallel so that either one that is activated, will turn on the lights!

theatretch85 03-10-2009 08:34 PM

I have the motion sensors for my stairway lights wired in parrellel so that either one will turn the lights on, but both have to be off in order for the lights to be off. Works just fine and better than just installing 3 way switches.

220/221 03-10-2009 09:18 PM

It will work. No backfeed issues.

I wondered the same thing several years ago so I tried it.

Just run a 3 wire between them and go color to color (black being hot).

genner 03-11-2009 10:00 AM

Ok now just making sure these will be used with outdoor type motion detector spot lights.

220/221 03-11-2009 06:25 PM

Yes :thumbsup::thumbsup::thumbsup:

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