Maximum Demand Calculation

A coincidence factor of 1.0 means everything peaks together. A factor of 0.8 means only 80% of the individual peaks occur at the same time. This method is more accurate when you have historical submeter data.

: Meets national electrical standards (e.g., AS/NZS 3000, NEC). Key Terms to Understand

This example demonstrates how motors, lifts, and similar loads add complexity because ratings depend on the availability of similar loads on the same phase. maximum demand calculation

Calculating maximum demand is not just a math problem; it's a high-stakes balancing act between engineering safety and economic efficiency

20 kW connected, demand factor 0.7 → 14 kW A coincidence factor of 1

[ MD = \textSum of Individual Loads \times \textDemand Factor \times \textDiversity Factor ]

Demand Factor=Maximum DemandTotal Connected LoadDemand Factor equals the fraction with numerator Maximum Demand and denominator Total Connected Load end-fraction : Meets national electrical standards (e

The maximum demand has been determined using the as outlined in [relevant standard, e.g., AS/NZS 3000 or BS 7671 ]. This involves three primary steps:

Manual calculations are becoming obsolete. Today, engineers use:

The sum of the continuous power ratings of all electrical equipment connected to a system.

Power factor = 0.7 (typical for motors) → 130 kVA → Use 160 kVA transformer.