The maximum demand here is 24kW. Above that and the 100A feeder fuse will rupture.
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The handbook to the "Canadian Electrical Code", current version is "C22.1-06", which is available through the Canadian Standards Association on-line store at http://www.ShopCSA.ca, has examples of demand calculations that meet the requirements for many types of occupancies.
The CEC section that mandates the requirements for and stipulates the rules to be observed for demand calculations is section #8. The NEC, I'm sure, has similar requirements as well.
You will need to check with the AHJ i n your area to see what code is in effect and what provisions are in it for demand calculations.
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Joe Contractor to Electrical Inspector, "What do you mean you are going to make me follow the code?".