Years ago I had to remove all 480V controls from out motor control centers and push button locations. The subject has come up again and I can't find anything that showes this being against code. I have not found anything NEC, NESC or OSHA. Can someone en lighten me on the subject.
You need to look in NFPA79 the standard for industrial machines and in IEEE/ANSI C47xxx the standard for switchgear.
These codes all but prevent any voltage to the door >240V.
