Cool 2 Black Wires Instead Of Green Wire On Light Switch References. Web i'm using lutron smart switch that has two black wire, one green/white wire, and one bare wire. But, if you need to wire a light fixture with two black wires, it’s essential to determine which one is hot and which is neutral.

Doing this gave power to the fan and the outlets but the light didn't work. Is a bit strange in 2 ways: Web i'm using lutron smart switch that has two black wire, one green/white wire, and one bare wire.