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Guide to the National Electrical Code by Thomas L. Harman

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Chapter 3General Design Calculations

This chapter discusses the design aspects of branch circuits and feeder circuits that depend on the type of load to be served. In the previous chapter the electrical system from the distribution station to the service, feeders, and branch circuits was described and a number of simple problems served to introduce the use of Code rules and tables which apply to electrical wiring design. The circuits were designed based on the amount of load to be served and there was little emphasis on the type of load or the type of occupancy. Section 3–1 discusses the effects the type of load to be served has on branch-circuit calculations. Section 3–2 provides a similar discussion for feeder circuit calculations and also ...

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