The L1011 has 115VAC outlets at every entry door, and they come in hand for charging mobile phones, laptops and...some of our CC have a special coffee machine to prepare latties, etc for the crew...one even brought a small waffle iron for waffles for the entire crew.
A nice touch.
So far as I know, the vacuum cleaners used by the ground crew for cabin cleaning are designed for the 400Hz, however, not sure if a regular 60Hz vacuum cleaner would work OK.
I suspect not.