In terms of motor ratings, what does "SF" stand for?

The abbreviation "SF" in the context of motor ratings stands for Service Factor. The Service Factor is a crucial rating that indicates how much additional load a motor can handle above its rated capacity without causing damage or reduced lifespan. For example, a motor rated with a Service Factor of 1.15 can run at 115% of its nominal output under specific conditions without overheating or malfunctioning.

Understanding the Service Factor is important for selecting the appropriate motor for applications that may require occasional overloads or sustained use near its rated capacity. This rating allows contractors and engineers to make informed decisions regarding the durability and reliability of electric motors in various environments and workloads.