| Load Type | Typical Demand Factor (DF) | |-----------|----------------------------| | Lighting (general) | 0.7 – 0.9 | | Lighting (large area, e.g., warehouse) | 0.9 – 1.0 | | Power outlets (general use) | 0.2 – 0.5 | | Air conditioning (multiple units) | 0.6 – 0.8 | | Elevators (residential) | 0.4 – 0.6 | | Elevators (commercial) | 0.5 – 0.7 | | Pumps (continuous) | 1.0 | | Pumps (intermittent) | 0.5 – 0.7 | | Motors (single, continuous duty) | 1.0 | | Welding machines | 0.3 – 0.5 | | Kitchen equipment | 0.4 – 0.7 | | Data center IT load | 0.9 – 1.0 |
Suppose we have a commercial building with the following electrical loads: maximum demand calculation
Assume PF = 0.85: ( 18.58 / 0.85 = 21.86 \ \textkVA ) → Round to 25 kVA transformer. | Load Type | Typical Demand Factor (DF)
Usually calculated at 100% of its full load because it runs continuously during peak heat. Conclusion maximum demand calculation