Update - pulled head out of rear.
I was used to the (old) rule of the service having to be sized according to the sum of the main overcurrent device ratings.
Your prompting towards reviewing the Code helped me find the applicable sections (220-10 mostly). Had to take the time to so a quick service calculation (200A is real overkill for this small duplex, but an anticipated future sales point, and they were willing to pay for it)
I know I looked through there before... oops.
[This message has been edited by DougW (edited 10-25-2004).]