10 CFR 431.446 : Energy (§ 1.1 To Parts 1801-1899) — (Parts 200-201 To Parts 491-499) — Department Of Energy (Parts 200-201 To Parts 491-499) — Energy Conservation (Parts 400-417 To Parts 491-499) — Energy Efficiency Program For Certain Commercial And Industrial Equipment (§ 431.1 To Appendix A To Subpart Y Of Part 431) — Small Electric Motors (§ 431.441 To § 431.448) — Energy Conservation Standards (§ 431.446 To § 431.448) — Small electric motors energy conservation standards and their effective dates.

(a) Each small electric motor manufactured (alone or as a component of another piece of non-covered equipment) after March 9, 2015, or in the case of a small electric motor which requires listing or certification by a nationally recognized safety testing laboratory, after March 9, 2017, shall have an average full load efficiency of not less than the following:

(b) For purposes of determining the required minimum average full load efficiency of an electric motor that has a horsepower or kilowatt rating between two horsepower or two kilowatt ratings listed in any table of efficiency standards in paragraph (a) of this section, each such motor shall be deemed to have a listed horsepower or kilowatt rating, determined as follows:

(1) A horsepower at or above the midpoint between the two consecutive horsepower ratings shall be rounded up to the higher of the two horsepower ratings;

(2) A horsepower below the midpoint between the two consecutive horsepower ratings shall be rounded down to the lower of the two horsepower ratings; or

(3) A kilowatt rating shall be directly converted from kilowatts to horsepower using the formula 1 kilowatt = (1/0.746) hp, without calculating beyond three significant decimal places, and the resulting horsepower shall be rounded in accordance with paragraphs (b)(1) or (b)(2) of this section, whichever applies.