What is the definition of "demand load" in Article 210?

The definition of "demand load" in Article 210 is the maximum expected load on a circuit, which considers factors like diversity and usage patterns. This definition is crucial because it recognizes that not all connected devices will draw their maximum power at the same time. In practical applications, demand load allows for the efficient design of electrical systems by allowing for load diversity; for instance, a residential service includes various loads that may not operate simultaneously at full capacity.

By accounting for these usage patterns, electricians can avoid over-sizing circuits and equipment, which can lead to increased costs and unnecessary energy use. This understanding is essential for safely and effectively distributing power throughout a building while ensuring that the system meets anticipated needs without being wastefully excessive.

In contrast to the other options, which either focus on total capacity, average use, or minimum requirements, the concept of demand load specifically addresses the peak load that a circuit might realistically face, integrating considerations of real-world usage and operational needs.