My house was built in 1950 and several light switches do not have ground wires. I believe there is no ground wire since I cannot find a wire that's bare - they are all coated.
I want to install a Lutron Motion Sensor, but it requires to connect to a ground wire. This is for a hallway light that's also controlled by another switch at the opposite end. When I installed it without connecting the wires that are expected to be connected to ground, nothing happened. Meaning, the switch did not work. I assume it was because the documentation was correct, that ground needs to be connected.
The person at the hardware store said to only connect the ground wires to the screws that afix the light switch. Is this OK? Is this safe?