In article . com, Albert wrote:
It might be grounded through the box, if steel. Your switch will then be
grounded through the installation screws.

Since the switch works does that mean it is grounded.

No.

Or is it
possible to work even if it is not grounded?

Yes. The switch does nothing more than interrupt the hot wire to the fixture.

--
Regards,
Doug Miller (alphageek at milmac dot com)

It's time to throw all their damned tea in the harbor again.