Maximum Demand Calculation: !!exclusive!!

Calculating Maximum Demand (MD) is essential for sizing electrical components like cables and circuit breakers without over-engineering the system. It represents the highest expected peak load, rather than just the sum of all connected equipment. Core Calculation Methods Electrical standards like AS/NZS 3000 (Australia/NZ) BS 7671 (UK) define four primary ways to determine MD: Calculation (Using Diversity Factors):

Used for existing installations slated for upgrades. Engineers install a data logger for a minimum period (often 1 to 4 weeks) to record actual peak consumption. Step-by-Step Calculation (Standard Method) maximum demand calculation

Air conditioning units, heat pumps, and resistive heaters. (Note: Heating and cooling are generally non-coincident loads; only the larger of the two is factored into the final calculation). Calculating Maximum Demand (MD) is essential for sizing

Some equipment, like large motors, draws a massive spike of current when starting. This must be considered to prevent nuisance tripping. Engineers install a data logger for a minimum

: Never add heating and cooling loads together. Use only the larger load of the two, as they never run at the same time.

Cannot be used for completely new greenfield developments.

The meter calculates the average power over the interval ($T$) by integrating the instantaneous power ($p(t)$).