What are the three main sections of load calculations?

The three main sections of load calculations are indeed branch circuits, feeders, and services. This classification is essential because it outlines the different components involved in electrical system design and load analysis.

Branch circuits are the final circuit arrangements that deliver power to electrical loads directly from the service or feeder. Understanding these circuits is vital for determining how much load can safely be connected while adhering to electrical codes and regulations.

Feeders are responsible for carrying power from the service equipment to the branch circuits. They serve as an intermediate pathway and play a crucial role in determining the overall capacity and efficiency of the electrical distribution system. Proper calculation of feeder loads ensures that these lines can handle the expected demand without overheating or causing failures.

Lastly, the service is the point where electrical power enters a facility or structure, which includes the service entrance equipment. It is vital to accurately calculate the service loads to ensure that the main service equipment is adequately rated to handle the incoming electricity safely and reliably.

This classification helps systematically approach load calculations, ensuring that all aspects of electrical distribution are taken into account for safe and efficient design.