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There are a couple of different kinds of load calculations in Part I:Some calculations are based on actual loads (nameplate ratings) like those for luminaires and specific appliances, and
Some allowances are based on building area, and some (like the laundry and small-appliance branch circuits required in dwellings) are assigned a load value only for feeder calculations. (The rating of bathroom, laundry and small appliance circuits is specified in Article 210, but the loads are assigned by Article 220.)
As noted earlier, branch-circuit load calculations covered in Part II are added together and used for feeder and service load calculations in Part III.
In Section 220.10, the general requirement says to use Sections 220.12, 220.14 and 220.16 for branch-circuit loads.
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