[Code of Federal Regulations] [Title 10, Volume 3] [Revised as of January 1, 2006] From the U.S. Government Printing Office via GPO Access [CITE: 10CFR431.25] [Page 398-399] TITLE 10--ENERGY CHAPTER II--DEPARTMENT OF ENERGY PART 431_ENERGY EFFICIENCY PROGRAM FOR CERTAIN COMMERCIAL AND INDUSTRIAL EQUIPMENT--Table of Contents Subpart B_Electric Motors Sec. 431.25 Energy conservation standards and effective dates. (a) Each electric motor manufactured (alone or as a component of another piece of equipment) after October 24, 1997, or in the case of an electric motor which requires listing or certification by a nationally recognized safety testing laboratory, after October 24, 1999, shall have a nominal full load efficiency of not less than the following: ---------------------------------------------------------------------------------------------------------------- Nominal full load efficiency ----------------------------------------------------------------------------- Motor horsepower/ standard Open motors (number of poles) Enclosed motors (number of poles) kilowatt equivalent ----------------------------------------------------------------------------- 6 4 2 6 4 2 ---------------------------------------------------------------------------------------------------------------- 1 / .75........................... 80.0 82.5 ........... 80.0 82.5 75.5 1.5 / 1.1......................... 84.0 84.0 82.5 85.5 84.0 82.5 2 / 1.5........................... 85.5 84.0 84.0 86.5 84.0 84.0 3 / 2.2........................... 86.5 86.5 84.0 87.5 87.5 85.5 5 / 3.7........................... 87.5 87.5 85.5 87.5 87.5 87.5 7.5 / 5.5......................... 88.5 88.5 87.5 89.5 89.5 88.5 10 / 7.5.......................... 90.2 89.5 88.5 89.5 89.5 89.5 15 / 11........................... 90.2 91.0 89.5 90.2 91.0 90.2 20 / 15........................... 91.0 91.0 90.2 90.2 91.0 90.2 25 / 18.5......................... 91.7 91.7 91.0 91.7 92.4 91.0 30 / 22........................... 92.4 92.4 91.0 91.7 92.4 91.0 40 / 30........................... 93.0 93.0 91.7 93.0 93.0 91.7 50 / 37........................... 93.0 93.0 92.4 93.0 93.0 92.4 60 / 45........................... 93.6 93.6 93.0 93.6 93.6 93.0 75 / 55........................... 93.6 94.1 93.0 93.6 94.1 93.0 100 / 75.......................... 94.1 94.1 93.0 94.1 94.5 93.6 125 / 90.......................... 94.1 94.5 93.6 94.1 94.5 94.5 150 / 110......................... 94.5 95.0 93.6 95.0 95.0 94.5 200 / 150......................... 94.5 95.0 94.5 95.0 95.0 95.0 ---------------------------------------------------------------------------------------------------------------- (b) For purposes of determining the required minimum nominal full load efficiency of an electric motor that has a horsepower or kilowatt rating between two horsepowers or kilowattages listed consecutively in paragraph (a) of this section, each such motor shall be deemed to have a horsepower or kilowatt rating that is listed in paragraph (a) of this section. The rating that the motor is deemed to have shall be determined as follows: (1) A horsepower at or above the midpoint between the two consecutive horsepowers shall be rounded up to the higher of the two horsepowers; (2) A horsepower below the midpoint between the two consecutive horsepowers shall be rounded down to the lower of the two horsepowers, or (3) A kilowatt rating shall be directly converted from kilowatts to horsepower using the formula, 1 kilowatt = (1 / 0.746) horsepower, without calculating beyond three significant decimal places, and the resulting horsepower shall be rounded in accordance with [[Page 399]] paragraphs (b)(1) or (b)(2) of this section, whichever applies. (c) This section does not apply to definite purpose motors, special purpose motors, and those motors exempted by the Secretary.