It appears some info maybe missing, kinda hard to tell without having some idea what loads are there (motors continuous loads 125%etc?? . Is this a school, store, what??We are sizing 3PH service with 120/208 panel and about 40KW of single phase loads all 120v. I took all loads with 100% demand factor according to code. Architect budgeted for a 3PH 100AMP...What do you think ?