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NOTE: This is an unformatted excerpt from our online fire protection training library.

Load Calculations

Summary

Summary

Load calculations are the basis for determining the size of all types of circuits in the National Electrical Code, particularly those that supply power or lighting equipment. Article 220 is the basis for all load calculations, although related requirements or modifications are found in many other sections. The NEC outlines voltage requirements for load calculations and gives specific requirements for calculating load for various types of circuits.
Demand factors are applied in some circumstances, when loads will be variable because equipment is not all used at the same time. The NEC describes when and how demand factors are to be applied for branch circuits, feeders, services, general lighting, motors and receptacles not in dwelling units. In some cases, loads for specific occupancies are calculated using different methods.
NOTE: This is an unformatted excerpt from our online fire protection training library.

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