Load Calculation
The process of determining the total electrical demand of a building to properly size the electrical service, feeders, and branch circuits.
Detailed Explanation
NEC Article 220 provides two methods: the Standard Method and the Optional Method. The standard calculation considers general lighting (3 VA per square foot for dwellings), small-appliance circuits (1,500 VA each), laundry circuit (1,500 VA), and specific appliance loads. Demand factors are applied to calculate the total demand, which determines the required service size. Accurate load calculations prevent overloaded circuits and ensure code compliance.
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