Amp calc.

[Hendrix]

163,206 VA load on a 208 Volt 3 phase service.

163,206/360.25=453 Amps So, a 600 amp. service ?

 

[augie47]

Should handle it, but you are assuming a balanced load between the three phases. To cover yourself, look at the load distribution and if there are any large motors.

 

[Hendrix]

This is a medical office so I dont think there will any large motors.

 

[augie47]

and you should be able to distribute your load fairly evenly,
If $$ are tight, you could feed (3) 200 amp panels from you meter or wireway and size your service condcutors on you calculated load (453 amps) vs a 600 amp main.

 

[petersonra]

and you should be able to distribute your load fairly evenly,
If $$ are tight, you could feed (3) 200 amp panels from you meter or wireway and size your service condcutors on you calculated load (453 amps) vs a 600 amp main.

Unless you have unusually large individual loads, why would this not be the standard approach one would take? It just seems like a much simpler approach.