What does "load calculation" involve in Article 210?

In Article 210 of the National Electrical Code (NEC), "load calculation" specifically pertains to determining the total demand for electrical power that will be supplied by branch circuits. This is crucial as it informs the design and installation of electrical systems to ensure that the circuits can handle the expected load safely and efficiently. Accurate load calculations are essential for selecting the appropriate size of conductors, overcurrent protection devices, and ensuring that the overall system complies with safety regulations.

Branch circuits must be designed to safely carry the expected load without the risk of overheating or tripping breakers. By conducting proper load calculations, electricians and engineers can prevent potential overloads and ensure that the electrical system will function as intended, avoiding hazards such as fires or equipment damage. This is why understanding load requirements is a fundamental aspect of electrical installations according to the NEC.