Which concept is used to estimate system load by accounting for variability in usage?

Which concept is used to estimate system load by accounting for variability in usage?

• A. Demand factors
• B. Ampacity
• C. The lesser
• D. Either A or B

Answer: (A)

Demand factors are used to estimate system load by accounting for variability in usage. They express how the maximum demand during a period relates to the total connected load, reflecting that not all equipment operates at full rating at the same time. By applying a demand factor, you derive a realistic peak load for sizing equipment and feeders without assuming everything runs at full capacity simultaneously. Ampacity deals with how much current a conductor can safely carry, based on insulation, temperature, and installation conditions, and does not address variability in usage.

Demand factors are used to estimate system load by accounting for variability in usage. They express how the maximum demand during a period relates to the total connected load, reflecting that not all equipment operates at full rating at the same time. By applying a demand factor, you derive a realistic peak load for sizing equipment and feeders without assuming everything runs at full capacity simultaneously. Ampacity deals with how much current a conductor can safely carry, based on insulation, temperature, and installation conditions, and does not address variability in usage.