Brook Crompton Small Motor Efficiency Rules (Effective March 2015)
This document from Brook Crompton explains the U.S. Department of Energy (DOE) Small Motor Efficiency Rules that became effective in March 2015. It outlines which general-purpose small motors are covered by the regulation, which motor types are excluded, and provides reference tables showing minimum average full-load efficiency requirements by horsepower, pole count, and motor design. The guide serves as a practical reference for engineers, maintenance professionals, and procurement teams responsible for specifying or replacing small electric motors in regulated applications.
Key Points
- Explains DOE Small Motor Efficiency regulations effective March 2015 for U.S. markets
- Defines the scope of covered general-purpose small motors from 1/4 to 3 HP
- Identifies applicable configurations, including ODP, continuous duty, and specific frame sizes
- Lists common exclusions such as special-purpose, multi-speed, enclosed, and non-standard motors
- Includes efficiency requirements for polyphase and capacitor-start single-phase motors
- Provides a clear efficiency comparison table by horsepower and pole count for compliance reference