Maximum Demand Calculation Jun 2026

The ratio of the sum of individual maximum demands to the maximum demand of the entire system. Because different loads peak at different times, this value is almost always greater than 1.

Using standardized tables and formulas (as shown above).

Maximum demand calculation sits at the intersection of engineering economics, safety, and regulatory compliance. The correct maximum demand ensures that: maximum demand calculation

Oversizing a system leads to unnecessary expenses in heavy-duty wiring and equipment.

Example: A residence with 6,000 W of equipment might have a maximum demand of 3,300 W, resulting in a demand factor of 2. Diversity Factor The ratio of the sum of individual maximum

Apply the relevant diversity factors stipulated by your governing electrical code to each category group.

Sophisticated demand tariffs differentiate between (measured during specific hours when the network is stressed) and anytime demand (measured continuously). In South Australia, for example, peak demand for large business customers is measured as the highest daily average demand between November and March, during either 11 a.m.–5 p.m. (CBD) or 5 p.m.–9 p.m. (rest of the state). Customers can reduce costs by shifting high‑power processes outside these peak windows. Maximum demand calculation sits at the intersection of

The system's average power factor (typically 0.8–0.95). Key Factors Affecting Demand

The ratio of the sum of individual maximum demands of various subdivisions of a system to the maximum demand of the entire system.