ECN Forum Forums General Topics of the Trade General Discussion Area When to use medium voltage instead of 480?

If the design was changed to use the MV on each floor then the electric rooms will be much larger than with the 480 volt system.

I doubt that it would save cost. The MV cable and equipment cost more than the 480 and will require more room that will cut into the available sq/ft for lease.

You will still need a MV switch for the POCO somewhere, most likely outside.

I don't think you will save much from the POCO.