I don't post often, as I'm no electrician. Just a lowly safety guy who steals info (OK, borrows it) from here. However, I need to say, OSHA doesn't say you may not leave your lock on at the end of the shift.

What the LOTO standard says is that I may not leave MY lock on if someone is to continue working on the de-energized equipment. Mine must be removed and the next shift guy or gal must replace it with their own.

If NO one will continue working on it, and I'll just come back in the next day (or whenever) and continue the project, my lock may stay in place...for what it's worth.