I never heard of a so called electrical vault.
I have heard of a switchgear room, buss duct, transformer bank, wire raceway, buss rail, breaker box, and current interrupter, etc.
Something stinks here besides smoked insulation.
http://www.nypost.com/p/news/local/manhattan/sunken_treasure_R1WidDOAwSBvWbYgSIoflJ
I’ve heard of electrical closet, but not electrical vault. Funny though, I’ve been in an electronic vault at the Hollywood Church of Scientology building as they had an emergency with a piece of equipment my employer provided them.
All those pictures of LR Hubbard wearing one of his various sailor hats and eyes gazing to the heavens .....