What is "Service Factor" on a Motor Nameplate?

The term "Service Factor" on a motor nameplate is a multiplier that indicates the maximum safe output of the motor under certain conditions. It represents the additional load that a motor can handle safely, above its rated load, without overheating or suffering damage. For example, a motor with a service factor of 1.15 can safely run at 115% of its rated capacity for short periods, which is helpful when dealing with temporary increases in load. This aspect is particularly important for ensuring that the motor can perform effectively and reliably in varying conditions, thus prolonging its operational life.

In contrast, the other options address different aspects of motor performance that do not pertain to the concept of service factor directly. Motor efficiency relates to how well a motor converts electrical energy into mechanical energy, but this does not provide information about maximum safe outputs. The average operational temperature indicates how hot the motor runs during normal operations but is not directly related to the service factor. Lastly, a measure of energy consumption pertains to the overall energy usage of the motor but does not reflect its capability to handle loads safely above its rated value.