Continuous Load
Definition
A load where the maximum current is expected to continue for 3 hours or more. Per NEC 210.20, conductors for continuous loads must be sized at 125% of the load current to account for sustained heat buildup.
Practical Note
Common continuous loads include lighting, HVAC equipment, and industrial processes. A 40A continuous load requires conductors rated for at least 50A (40 × 1.25).
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