I just recently (within 60 days) ran into this exact same issue on a 2000A switchboard. Drawings showed an 800A breaker installed in this unit - I happened to be looking at the manufacturers web site for a part number to place in some bid documents and discovered that an 800A SWITCH was...
Anybody ever seen MC cable used as a power distribution means from main switchgear (480V 3phz) to power distribution panels in an industrial facility?
I'm more of a controls / PLC / machinery kind of guy - don't deal with power distribution systems. I am doing some controls work at a client...