It is the nature of the applied load that dictates the system power factor.

a) The loads which operate at or very close to unity (1.0) power factor include most forms of lighting, all heating elements, rectifier and thyristor type loads & all domestic loads which are fractional hp motors (washing machine, refrigerator, etc.)

b) For all remaining load types, some knowledge of operating power factor is required, which for motors depends a great deal on their size and power rating.