Does the typical light switch not serve as a "disconnect" for "fastened in place utilization equipment" ? I've always thought about it that way, aside from three-ways of course. Might be opening Pandora's box w/ this one... just some food for thought.
Dare I suggest that all lighting circuit branch circuit OCPD's be lockable and risk crucifixion by the forum, lol.
It can be used as the required disconnecting means. Not all such equipment requires a disconnecting means within sight. Some cases the branch circuit device can be the disconnecting means and doesn't even require locking mechanism.
That said there is locking attachments that do work for basic wall toggle switches. NEC doesn't require them, may be cases where they can be permitted.
NEC doesn't require locking means other than when permitted to not be within sight in certain situations. There likely is many safe work practice policies that require locking the disconnect even if it is within sight though. Those often can be non permanent locking means.
