Then: MD (kVA) = MD (kW) / Average Power Factor
For a standard domestic or non-domestic installation, follow these steps: maximum demand calculation
: Identify every individual circuit and its total connected load in watts or amperes. Then: MD (kVA) = MD (kW) / Average
Wait – be careful. In British (IEC) standards, the relationship is often inverted. The safest universal formula is the "Sum of Individual Demands after applying DF, then divided by Diversity Factor." The safest universal formula is the "Sum of
The first critical nuance of MD calculation lies in the . Contrary to popular misconception, maximum demand does not refer to a fleeting, instantaneous surge of current (e.g., starting a large motor). Such transient spikes are typically handled by protective devices like circuit breakers, but they do not dictate long-term infrastructure loading. Instead, MD is measured over a continuous, sliding time window.