Trying to replace the old switches in my house to occupancy sensors. I assumed it would be a snap but when I opened up the switches I found that only two wires were feeding the switches so now I'm trying to figure out all the details of hot, neutral, ground and load wires. Some of the switches only have the two wires in the box and I don't see a neutral wire so there's nothing I can do there.
This is what the other switches look like,
I'm trying to match up these boxes to this diagram, http://www.indepthinfo.com/wire-swit...ch-light.shtml
So the wires connected to the switch are black and the two bundles of wires in the back are white. It all matches the diagram except for the black wire on the bottom, that wire is also bundled to the set of two white wires on the bottom. Why?
Like the diagram, can I assume that the three white wires bundled and capped off are the ground wires? When I open the box back up I will confirm that they're connected to the box.
There's also a very short copper-ended wire in the back. What is that all about?
Is there any way I can do this on my own or do I need an electrician?