What does Article 220 in the NEC cover?

Article 220 of the National Electrical Code (NEC) specifically addresses the calculations necessary for determining branch-circuit, feeder, and service loads. This article is essential for electricians as it provides the guidelines needed to accurately compute the electrical loads that a system can handle. These calculations are crucial for ensuring that the electrical installation is safe and complies with the code, preventing overloading and potential hazards.

Understanding how to perform these load calculations helps in designing electrical systems that can meet the needs of a building or installation while adhering to safety standards. By following the rules set forth in Article 220, electricians can ensure their installations are not only efficient but also legal under the provisions of the NEC.

In contrast, other articles such as those covering feeder loads, service equipment, or wiring methods focus on different aspects of electrical installations. While important, they do not encompass the specific load calculation procedures outlined in Article 220. Therefore, recognizing the significance of load calculations in Article 220 is imperative for any electrical contractor or professional.