These would be two digit alpha codes used in fossil and nuke plants.
Just off the top of my head:
SJ: Feedwater system
EC: Low voltage power system
sorry, I'm at home and can't come up with any others at the moment...
I'm not sure of the logic to them, but we have a document labeled...
first time caller ...
Would anyone know where to find ANSI/IEEE System Identification codes for wind turbines? Does something like this even exist?
I'm looking at ANSI/IEEE Std 806 and not finding the info ...
