US DoE Integral Horsepower Motor Rule for Low Voltage Motors

This ABB product note outlines the U.S. Department of Energy’s Integral Horsepower Motor Rule, which establishes updated minimum efficiency standards for three-phase low voltage industrial motors. The document details covered and exempt motor types, testing and compliance methods, penalties for non-compliance, and ABB’s IHP-compliant motor offerings.

Key Points

  • The Integral Horsepower Motor Rule (IHP) updates efficiency requirements for nearly all three-phase AC motors from 1–500 HP.
  • Certain motor types, such as submersible, multi-speed, and synchronous motors, are excluded from IHP coverage.
  • Manufacturers must self-certify efficiency and label motors with DOE-approved compliance codes.
  • ABB provides IHP-compliant NEMA Premium motors and ordering options for U.S. market compliance.
  • IHP aligns U.S. efficiency standards with NEMA MG-1:2014 Table 12-12 and IEC 60034-30-1 IE3 levels.
  • Motor efficiency testing must comply with IEEE Std 112, Test Method B or CSA 390-10, verified by accredited labs.
  • Penalties apply for importing or selling motors below minimum efficiency levels.
  • The rule enhances national energy efficiency by ensuring consistent performance standards for industrial motors.