230-2-e (identification)kicks you over to 225-37( more identification)which tells you to mark everything.
Then we come to Ex #1 which basically says that you can blow that off if you maintain "safe switching procedures"
( exceptions can be so conflicting!)
This is probably what Don stated....
Once in a while i'll go on a service call where everything is identified. I'm sure it takes some time, but it sure saves some too...
As i read it,without hashin' 230 too hard, you could have six meters and mains, .
I wonder if some places are purposley set up this way to avoid larger more expensive services, or to introduce a variety of voltages without having to pitch for an X-former