Wiring a 3 wire motion sensor to a light


Old 09-24-07, 07:49 AM
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Wiring a 3 wire motion sensor to a light

Hi all - I have a scenario where I would like to wire a motion sensor separately from the light itself, in order to turn the light on before walking around the corner for example... basically, I would like to enable a non-motion halogen light to become motion sensed... if that makes sense?

I purchased a replacement motion sensor head and have mounted it on a 1/2" box plate using the threaded connector, this is similar to buying a 1 head spotlight and doing the mounting yourself... never-the-less, this sensor has 3 wires coming out of it - black, white, red...

I have power coming out of the house and into the first box (motion sensor) and from this box have run another 14/2 wire up to the light and have wired the light black-to-black and white-to-white, and of course grounded it...

My issue is how to connect the motion, since this is a replacement head, is this possible? I can't see why not with a little creativity here...

Just to be clear this is what the first junction box looks like:

from house (power) - white/black
from light - white/black
motion sensor - white/black/red

I've omitted the copper grounds as they are assumed to be connected...

Any ideas? Thanks in advance!

ps. the instructions are specific to replacing a defective head on an existing motion, I'm using this head as way to control a light which did not previously have a motion sensor...
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Old 09-24-07, 08:02 AM
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The black wire is the input to the sensor, the red wire is the switched output. The white wire, of course, is the neutral.
Old 09-24-07, 08:12 AM
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From the house to the sensor: black to black, white to white.
From the sensor to the light: white to white, red on sensor to black on light.
Old 09-24-07, 11:51 AM
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Hi everyone, connected as described and it's working perfectly...


As with any electrical DIY job, it's always better to have confirmation from the pros so thank you all for your input with this.
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