I purchased a Lutron dimmer that has 2 black wires and one green. However, my bathroom outlet box does not have a green or copper wire. Connected to the switch is a red wire in the top screw and a black wire in the bottom screw. Within the outlet box it appears as if 3 black wires are capped together (one of the three is the black wire from the switch). Finally, tucked in the back of the outlet are 2 white wires (capped).
Again, there is not a green or copper wire anywhere in the outlet box. My question: Can I install this dimmer without a green wire? I am a renter in a post-war building. FYI - I installed a new vanity light earlier this week and there was no green wire there either. I contacted the Electrical Dept. at Home Depot and the representative told me that the green wire was not necessary, so I proceeded with the installation and have not experienced any problems. He also mentioned that most older apartments in NYC are not wired with the green grounding wires. Thanks!