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64 FR 54141, Oct. 5, 1999, unless otherwise noted.
69 FR 61923, Oct. 21, 2004, unless otherwise noted.
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At 90 FR 43371, Sept. 9, 2025, as required by the Congressional Review Act and Pub. L. 119-8, the Department of Energy removed the amendments to several sections in part 431 made effective on Dec. 23, 2024, at 89 FR 91163, Oct. 9, 2024. As of Sept. 9, 2025, the affected sections reverted to the Dec. 22, 2024 version.
This subpart contains energy conservation requirements for electric motors. It contains test procedures that EPCA requires DOE to prescribe, related requirements, energy conservation standards prescribed by EPCA, labeling rules, and compliance procedures. It also identifies materials incorporated by reference in this part. This subpart does not cover “small electric motors,” which are addressed in subpart X of this part. This subpart does not cover electric motors that are “dedicated-purpose pool pump motors,” which are addressed in subpart Z of this part.
[77 FR 26633, May 4, 2012, as amended at 86 FR 40774, July 29, 2021]