What does NEC Article 220 primarily focus on?

The focus of NEC Article 220 is on branch circuit and load calculations, which is crucial for determining the appropriate capacities and requirements for electrical installations. This article provides guidelines on how to calculate the demand loads on branch circuits and services, ensuring that electrical systems are designed to safely and effectively handle the expected electrical loads.

Understanding these calculations helps in sizing conductors, circuit breakers, and feeders correctly, which is essential for maintaining both safety and efficiency in electrical systems. This understanding allows electricians and engineers to design systems that minimize the risk of overload and ensure the proper functioning of electrical equipment in residential, commercial, and industrial settings.

The other options, while related to electrical work and safety, do not capture the specific focus of Article 220, which is exclusively dedicated to the methodologies and requirements for load calculations associated with branch circuits.