Electric motors can draw 5–7 times their running current when they start. This "inrush" needs to be considered for breaker selection.
Compliance with local codes (like the NEC in the US or AS/NZS 3000 in Australia/NZ) requires documented maximum demand figures. The Standard Methods of Calculation There are three primary ways engineers approach this: 1. Calculation by Determination (The Formulaic Approach) maximum demand calculation
Facility managers and energy engineers need to avoid exceeding their contracted (kW) with the utility. Exceeding it can lead to: Electric motors can draw 5–7 times their running
Utility companies use these calculations to decide which transformer is needed to service a property without blowing the grid. maximum demand calculation