I am trying to install a Lutron Maestro Fan/Light dimmer, but I’m not sure what to do with the ground wire on the switch. The old fan/light dimmer switch does not have a ground wire. The switch box has three romex wires coming in. The power for the light and fan are both clear to see, but I have three ground wires that are tied together with a green wire cap and pig tailed into three neutrals that are capped. Should I tie the ground wire for my new switch into the pig tail of the ground, which is tied into the three neutrals or just cap the ground wire on the new switch.
Grounds should NEVER be connected to neutrals, except once, at the main panel. This should be separated. Then there will be two possible outcomes: (1) everything works fine (or) (2) things stop working. What this means is that somewhere, a neutral back to the panel is broken and someone hacked it to work by bootlegging the ground as neutral.
I suspect the latter and you will probably need a professional electrician to straighten it out. Under no condition should you leave the bootleg connection for long. The issue is that there are conditions where the bootleg could energize the grounds connected to various devices, producing a hazardous condition, possibly death by electrocution!