Quote"Now I go to the building supervisor and tell them I need to perform a shutdown and whats a good time for you. I have had zero problems since I took that approach.

I'm going to use this approach from now on, thanks Drillman.
Was the electrician told it had to be done live? Or did he just feel comfortable doing it live? Personally in the past I've done the same thing, Turning off power is a hastle, I'll be done and on my way to the next job in half hour.
We had an accident in my town recently where a guy was told the power could not be turned off but after he got shocked it was off in minutes!
If it has been off before it can be off again!