Feeder and Service Load Calculations, Part 3 Dorling Kindersley/Thinkstock

Feeder and Service Load Calculations, Part 3

Using demand factors is a way to account for actual usage versus available usage, and thus arrive at more realistic load values and thus less costly installations.

Article 100 defines “demand factor” as the ratio of the maximum demand of a system (or part of a system) to the total connected load of a system (or part of a system). Using demand factors is a way to account for actual usage versus available usage, and thus arrive at more realistic load values and thus less costly installations.

So, for example, you have 10 welding receptacles in a shop. The shop owns 2 welders. At any given time, only 20% of those receptacles will be i

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