It also varies by state and city here in the U.S.In many countries, it is against the laws and regulations for any person to work on personnel lift(both mechanical and electrical) circuits without authorization or certification by the lift company and/or licensing authority.
The lift control room door must be locked at all times to prevent curious people from access.
Similar circumstances applies to fire protection circuitry too.
1) I'm legally allowed to work on anything electrical in the building EXCEPT for the 1 floor freight elevator.
2) I'm legally allowed to work on anything related to the fire system EXCEPT for the related plumbing.
3) I'm legally allowed to work on the water and gas plumbing, but not any underfloor heat systems.
(of course we have none of those)
Considering the sheer amount of ampacity we have coming into the building
(2 ea. dedicated 6,000A 480V 3 phase step downs on the ground outside,
internally limited by indoor main panel breakers to 4,000A & 2,500A)
the electrical was the hardest to get approval on. The state calls me legal, the city & I have an understanding.
When I called the city inspector years ago to explain we had moved and wanted to make sure he was still OK with our agreement he merely commented that he'd seen enough of my work ethics and major installations dealing with the 240 Delta and 208Y/120 at the old place that, since I fell into legality on the state level and that I felt comfortable around the new systems, he had no problems with it at all but as with the old place to give him a call if I was in doubt interpreting a regulation.
Quite honestly I feel a lot safer in this new building, the old one was a hodgepodge of problems just waiting to occur.
Sure, it's #12 AWG but it's cloth covered crumbling rubber insulation and I'm replacing it.
Why is this white wire hot and the blue one neutral here but there are no blue wires in the panel?
OK, what idiot ran Romex to all the lighting above this ceiling? This is a commercial building.
(To the CEO You want to know what might be causing some of these PCs to meet an early death after a lightning storm? Throwing $20 surge strips everywhere can't hurt but it isn't the answer. There are absolutely no ground rods or anything else acceptable on the service entry points, you have two totally different forms of electrical power in the buildings and all of the computers & network switches are serving as a floating ground system between the buildings that are 208Y and the ones that are 240 Delta.
My back still aches from hammer drilling large holes through 12" brick shelled, concrete filled walls, 8" thick sidewalks and pounding ground rods through a parking lot that must have been 2' of gravel put down over the years on top of an old railroad siding.