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Article 220 provides requirements for computing branch-circuit, feeder, and service loads. It has the same type of arrangement (in parts) seen in other articles:Part I covers the general rules that apply to all load calculations. Part II addresses branch-circuit load calculations. Part III uses the branch-circuit load calculations to calculate feeder and service loads. Part IV provides optional feeder and service load calculations for specific types of occupancies and specific types of loads. Part V addresses load calculations for farms.
It is important to recognize the other articles that may apply. The articles that include other load calculations for specific equipment and conditions are noted in Table 220.3. These references are in addition to the requirements of Article 220 or may modify those requirements.
In some cases, Article 220 refers directly to these articles for the load calculation. For example, Section 220.14(C) refers to Article 430 and uses the value calculated for a minimum size of motor circuit conductor as the calculated load.
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