What is a continuous load in electrical terms?

A continuous load in electrical terms refers to a load that is expected to operate for three hours or more without interruption. The reason this definition is crucial in the context of electrical systems is that it helps in the sizing and planning of electrical equipment and circuits. Continuous loads must be accounted for when designing systems to ensure that conductors, transformers, and other equipment can handle the sustained demand over time without overheating or failing.

This definition is particularly important for ensuring safety and reliability in electrical installations. When planning electrical systems, including feeders and service drops, engineers must consider the continuous load to determine the appropriate ratings for devices and components, ensuring they operate efficiently and safely over their lifetime.

In contrast, other types of loads, such as fluctuating loads or temporary loads, do not meet the criteria for continuous operation and therefore do not require the same level of consideration in terms of long-term capacity planning. Understanding these distinctions is essential for effective load calculations and ensuring compliance with relevant electrical codes and standards.