Variables
Description
What is this formula?
Demand Factor compares the maximum electrical demand of a system with its total connected load.
When to use it
Use this formula when estimating electrical service capacity, sizing feeders, evaluating industrial installations, and planning power distribution systems.
Example
A building has:
Connected load = 800 kW
Maximum demand = 560 kW
Formula:
DF = Pmax / Pconn
Substitution:
DF = 560 / 800
Result:
DF = 0.70
DF = 70%
Applications
Electrical load estimation
Feeder and transformer sizing
Power distribution planning
Industrial electrical design
Utility demand analysis
Note
Demand Factor is an operational design ratio. It depends on how many connected loads operate simultaneously, so it should be selected or calculated according to the type of facility, usage pattern, and applicable electrical design standards.