Tesla,
Your "sample" system is almost exactly what we are working with here in the original design. The only difference is that we are planning a separate 480:208 transformer in each electrical room (two per floor) since the facility is rather large and we don't want to distribute both 408and 208 separately all around the building at very high current. I believe we now concur with your statement that MV is not a consideration for a service this size. The cost of switchgear and the additional space requirements make it a poor choice. I'm curious, though, why you don't think vertical bus duct would be reasonable? It seems like a logical choice here, no?
