I'm quite new to home electrical work. I have 6 thin LED pot lights I would like to set up in my dining room. Each one has a box, expecting hot, neutral and bare ground wires:
I removed the old light that was there, and a black and white wire was the result. No bare copper ground wire. I taped and capped the wires to be safe. It would appear that the light switch only controls whatever is connected to these wires:
What should I do about the missing bare copper ground wire? Could it be up there somewhere? Should I look for it? Or should I removed everything coming from the light switch and start with a fresh piece of 14/2 Romex?
Another question, what is this above my faux tile? Is it a layer of insulation? Should the LED boxes be installed above this?