Demand Calculation - Maximum

of a single home, because they don't all peak at the same time. D. Load Factor

Engineers should follow standard guidelines rather than devising demand calculations based on generalizations. The NEC provides specific tables and allowances for demand factor reductions.

The maximum demand of a whole facility occurs when multiple loads happen to peak at the same time. In power system terms, this is the . Diversity factors are designed to reflect realistic simultaneity. In multi‑building campuses or subdivisions, the overall system peak may be considerably lower than the sum of each building’s individual peaks. maximum demand calculation

: 20 double sockets (assumed standard 10A rating per socket group) Air Conditioning : 2 units at 3,000W each = 6,000W

Demand Factor=Maximum Demand LoadTotal Connected LoadDemand Factor equals the fraction with numerator Maximum Demand Load and denominator Total Connected Load end-fraction Diversity Factor of a single home, because they don't all

Grouped by circuits, assuming only a fraction of outlets will deliver full power simultaneously.

This method relies on local electrical codes (like AS/NZS 3000 Appendix C or the National Electrical Code). It applies fixed load groups and specific diversity factors based on the occupancy type. 2. The Assessment Method The NEC provides specific tables and allowances for

Here is a simplified example based on standard diversity rules for a single-phase residential property: Step 1: List the Connected Loads 20 points (totaling 400W) Power Outlets: 30 standard sockets Electric Oven: 4.5 kW Air Conditioner: 3.5 kW Step 2: Apply Diversity Rules

Calculated maximum demand: Depending on the specific diversity factors used, the after‑diversity maximum demand might land in the range of .

Once MD is calculated and understood, facilities often implement to reduce costs.