Electrical – How to connect a new Lutron sensing switch

electricalswitchwiring

I'm changing a light switch to motion sensor switch. I have 2 black wires coming from power source (only 1 is hot), and 1 black wire is going to light.
The whites (neutrals) are tied in together bypassing switch. I know to leave these alone.

How do I tie these in to a Lutron sensing switch?
The switch has 2 black wires,
1 green (ground) I understand these
1 blue labeled as traveler.
1 extra wire that is alone and appears to be a connector if needed.

Allow me to label the black wires at the junction box.
A. is black HOT
B. is black (not hot) also coming into the box from the bottom separate from hot.
C. is black going to lights.

Best Answer

I think I've installed the switch you are talking about before.

  • Blue wire (traveler) is for 3-way applications, just cap it off
  • Green wire (ground) ties in to the exposed copper wire of your Romex, or into the box if you have BX cable
  • Black wires: because you are using AC current, the switch doesn't really care which side of the circuit is truly 'hot'. You just need to tie in one of them to a hot wire (A), and the other to the light(C).
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