What does a motor's "service factor" indicate?

The "service factor" of a motor is a crucial characteristic that indicates the motor's ability to handle overload conditions. It is expressed as a multiplier of the motor's rated horsepower or output. For example, a motor with a service factor of 1.15 can safely operate at 15% above its nominal rating under certain conditions without overheating or sustaining damage. This means that the service factor provides insight into how much additional load the motor can tolerate beyond its standard operating capacity, which is particularly important in applications where conditions may lead to temporary overloads.

This concept is significant because it allows users to ensure they select a motor that can withstand operational variances, accommodating for factors such as starting surges or variable load demands without compromising performance or longevity.