Wiring – How to connect the new motion-detecting light switch

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I bought a Legrand RRW600U motion-detecting light switch and I could use some help wiring it to my bathroom light. It's a renovation so I have complete access to the ceiling, wall, and floor framing.

The switch has three wires in the back (black, red, and yellow) and a single green(ish) screw. The bathroom light has three wires: black, white, and bare copper. I am installing new, 14/2 non-metallic sheathed cable to connect the service panel to the switch to the light.

Both the printed instructions and the only YouTube video I could find seem to assume that the electrical circuit passes through the light before terminating in the switch. I would like my circuit to pass through the switch and terminate in the light.

How would I wire the switch to the light in that setup?

Best Answer

I cleaned up the diagram from the directions:

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  • Neutral passes through (White to white wire)
  • Line (Black) connects to black on the switch
  • Red from the switch connects to black wire to the light
  • Yellow from the switch is not connected, just capped off with a wire nut
  • Ground everything
    • Green wire on switch
    • Ground must be connected to ground screw on all junction boxes
    • Ground on all wires also connected together
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