Why is it essential to consider power sources during load calculations?

Considering power sources during load calculations is essential because it ensures that the power supply capacity adequately meets the demand of the connected loads. When performing load calculations, identifying the total expected demand allows you to select an appropriate power source that can handle that load without risk of overrunning its capacity. This is crucial because if the power supply cannot meet the demands of the loads, it could lead to overheating, damage to equipment, power outages, or even fire hazards.

Furthermore, by understanding power sources and their limitations, designers and electricians can plan for necessary safeguards, such as circuit breakers or fuses, and ensure that systems are designed to run efficiently and safely. This thorough assessment is a foundational aspect of electrical planning and ensures reliability and safety in electrical installations.