How to Read An Electric Motor Nameplate

Efficiency Code

This shows the percentage of the input power that is actually converted to work output from the motor shaft.

The motor will have a “nominal” efficiency shown on the plate, this is the average efficiency. The closer this value is to 100%, the lower the electricity consumption cost is going to be.

The four levels of motor efficiency are

  • IE1 – Standard Efficiency
  • IE 2 – High Efficiency
  • IE 3 – Premium Efficiency
  • IE 4 – Super Premium Efficiency

In our example, we are shown an IE Code of IE3 which indicating premium efficiency.