I am replacing a bathroom medicine cabinet that has a light fixture attached. The old light fixture only had white and black wires. The new light fixture has white, black, and a copper wire. This is a very old home, and I am assuming that nothing has any grounding. What should I do with the ground wire? Can I leave the ground wire just dangling? Or is there some way that I can/should ground it? It's not my home, and the homeowner will likely not want to pay for any extensive electrical upgrades. Suggestions?
Some electricians say leave it for future renovations when a whole house ground becomes available.
Other electricians say cut out the ground if there is no ground available because it takes up cubic space. In addition it might become energized and become a shock hazard.
I am a little hesitant to cutting it out with expensive dimmers as I might have to return them to the supplier in working condition. But 99℅ of the time I cut them out when there is no whole house ground.