10 CFR 431.25 - Energy conservation standards and effective dates.

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§ 431.25 Energy conservation standards and effective dates.
(a) Except as provided for fire pump electric motors in paragraph (b) of this section, each general purpose electric motor (subtype I) with a power rating of 1 horsepower or greater, but not greater than 200 horsepower, including a NEMA Design B or an equivalent IEC Design N motor that is a general purpose electric motor (subtype I), manufactured (alone or as a component of another piece of equipment) on or after December 19, 2010, shall have a nominal full-load efficiency that is not less than the following:
Table 1—Nominal Full-Load Efficiencies of General Purpose Electric Motors (Subtype I), Except Fire Pump Electric Motors
Motor horsepower/standard kilowatt equivalent Nominal full-load efficiency
Open motors(number of poles) Enclosed motors(number of poles)
6 4 2 6 4 2
1/.75 82.5 85.5 77.0 82.5 85.5 77.0
1.5/1.1 86.5 86.5 84.0 87.5 86.5 84.0
2/1.5 87.5 86.5 85.5 88.5 86.5 85.5
3/2.2 88.5 89.5 85.5 89.5 89.5 86.5
5/3.7 89.5 89.5 86.5 89.5 89.5 88.5
7.5/5.5 90.2 91.0 88.5 91.0 91.7 89.5
10/7.5 91.7 91.7 89.5 91.0 91.7 90.2
15/11 91.7 93.0 90.2 91.7 92.4 91.0
20/15 92.4 93.0 91.0 91.7 93.0 91.0
25/18.5 93.0 93.6 91.7 93.0 93.6 91.7
30/22 93.6 94.1 91.7 93.0 93.6 91.7
40/30 94.1 94.1 92.4 94.1 94.1 92.4
50/37 94.1 94.5 93.0 94.1 94.5 93.0
60/45 94.5 95.0 93.6 94.5 95.0 93.6
75/55 94.5 95.0 93.6 94.5 95.4 93.6
100/75 95.0 95.4 93.6 95.0 95.4 94.1
125/90 95.0 95.4 94.1 95.0 95.4 95.0
150/110 95.4 95.8 94.1 95.8 95.8 95.0
200/150 95.4 95.8 95.0 95.8 96.2 95.4
(b) Each fire pump electric motor that is a general purpose electric motor (subtype I) or general purpose electric motor (subtype II) manufactured (alone or as a component of another piece of equipment) on or after December 19, 2010, shall have a nominal full-load efficiency that is not less than the following:
Table 2—Nominal Full-Load Efficiencies of Fire Pump Electric Motors
Motor horsepower/standardkilowatt equivalent Nominal full-load efficiency
Open motors(number of poles) Enclosed motors(number of poles)
8 6 4 2 8 6 4 2
1/.75 74.0 80.0 82.5 74.0 80.0 82.5 75.5
1.5/1.1 75.5 84.0 84.0 82.5 77.0 85.5 84.0 82.5
2/1.5 85.5 85.5 84.0 84.0 82.5 86.5 84.0 84.0
3/2.2 86.5 86.5 86.5 84.0 84.0 87.5 87.5 85.5
5/3.7 87.5 87.5 87.5 85.5 85.5 87.5 87.5 87.5
7.5/5.5 88.5 88.5 88.5 87.5 85.5 89.5 89.5 88.5
10/7.5 89.5 90.2 89.5 88.5 88.5 89.5 89.5 89.5
15/11 89.5 90.2 91.0 89.5 88.5 90.2 91.0 90.2
20/15 90.2 91.0 91.0 90.2 89.5 90.2 91.0 90.2
25/18.5 90.2 91.7 91.7 91.0 89.5 91.7 92.4 91.0
30/22 91.0 92.4 92.4 91.0 91.0 91.7 92.4 91.0
40/30 91.0 93.0 93.0 91.7 91.0 93.0 93.0 91.7
50/37 91.7 93.0 93.0 92.4 91.7 93.0 93.0 92.4
60/45 92.4 93.6 93.6 93.0 91.7 93.6 93.6 93.0
75/55 93.6 93.6 94.1 93.0 93.0 93.6 94.1 93.0
100/75 93.6 94.1 94.1 93.0 93.0 94.1 94.5 93.6
125/90 93.6 94.1 94.5 93.6 93.6 94.1 94.5 94.5
150/110 93.6 94.5 95.0 93.6 93.6 95.0 95.0 94.5
200/150 93.6 94.5 95.0 94.5 94.1 95.0 95.0 95.0
250/186 94.5 95.4 95.4 94.5 94.5 95.0 95.0 95.4
300/224 95.4 95.4 95.0 95.0 95.4 95.4
350/261 95.4 95.4 95.0 95.0 95.4 95.4
400/298 95.4 95.4 95.4 95.4
450/336 95.8 95.8 95.4 95.4
500/373 95.8 95.8 95.8 95.4
(c) Except as provided for fire pump electric motors in paragraph (b) of this section, each general purpose electric motor (subtype II) with a power rating of 1 horsepower or greater, but not greater than 200 horsepower, including a NEMA Design B or an equivalent IEC Design N motor that is a general purpose electric motor (subtype II), manufactured (alone or as a component of another piece of equipment) on or after December 19, 2010, shall have a nominal full-load efficiency that is not less than the following:
Table 3—Nominal Full-Load Efficiencies of General Purpose Electric Motors (Subtype II), Except Fire Pump Electric Motors
Motor horsepower/standard kilowatt equivalent Nominal full-load efficiency
Open motors(number of poles) Enclosed motors(number of poles)
8 6 4 2 8 6 4 2
1/.75 74.0 80.0 82.5 74.0 80.0 82.5 75.5
1.5/1.1 75.5 84.0 84.0 82.5 77.0 85.5 84.0 82.5
2/1.5 85.5 85.5 84.0 84.0 82.5 86.5 84.0 84.0
3/2.2 86.5 86.5 86.5 84.0 84.0 87.5 87.5 85.5
5/3.7 87.5 87.5 87.5 85.5 85.5 87.5 87.5 87.5
7.5/5.5 88.5 88.5 88.5 87.5 85.5 89.5 89.5 88.5
10/7.5 89.5 90.2 89.5 88.5 88.5 89.5 89.5 89.5
15/11 89.5 90.2 91.0 89.5 88.5 90.2 91.0 90.2
20/15 90.2 91.0 91.0 90.2 89.5 90.2 91.0 90.2
25/18.5 90.2 91.7 91.7 91.0 89.5 91.7 92.4 91.0
30/22 91.0 92.4 92.4 91.0 91.0 91.7 92.4 91.0
40/30 91.0 93.0 93.0 91.7 91.0 93.0 93.0 91.7
50/37 91.7 93.0 93.0 92.4 91.7 93.0 93.0 92.4
60/45 92.4 93.6 93.6 93.0 91.7 93.6 93.6 93.0
75/55 93.6 93.6 94.1 93.0 93.0 93.6 94.1 93.0
100/75 93.6 94.1 94.1 93.0 93.0 94.1 94.5 93.6
125/90 93.6 94.1 94.5 93.6 93.6 94.1 94.5 94.5
150/110 93.6 94.5 95.0 93.6 93.6 95.0 95.0 94.5
200/150 93.6 94.5 95.0 94.5 94.1 95.0 95.0 95.0
(d) Each NEMA Design B or an equivalent IEC Design N motor that is a general purpose electric motor (subtype I) or general purpose electric motor (subtype II), excluding fire pump electric motors, with a power rating of more than 200 horsepower, but not greater than 500 horsepower, manufactured (alone or as a component of another piece of equipment) on or after December 19, 2010, shall have a nominal full-load efficiency that is not less than the following:
Table 4—Nominal Full-Load Efficiencies of NEMA Design B General Purpose Electric Motors (Subtype I and II), Except Fire Pump Electric Motors
Motor horsepower/standard kilowatt equivalent Nominal full-load efficiency
Open motors(number of poles) Enclosed motors(number of poles)
8 6 4 2 8 6 4 2
250/186 94.5 95.4 95.4 94.5 94.5 95.0 95.0 95.4
300/224 95.4 95.4 95.0 95.0 95.4 95.4
350/261 95.4 95.4 95.0 95.0 95.4 95.4
400/298 95.4 95.4 95.4 95.4
450/336 95.8 95.8 95.4 95.4
500/373 95.8 95.8 95.8 95.4
(e) For purposes of determining the required minimum nominal 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 energy conservation standards in paragraphs (a) through (d) 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 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. The conversion should be calculated to three significant decimal places, and the resulting horsepower shall be rounded in accordance with paragraph (e)(1) or (e)(2) of this section, whichever applies.
(f) This section does not apply to definite purpose motors, special purpose motors, or those motors exempted by the Secretary.
[77 FR 26635, May 4, 2012]

Title 10 published on 2014-01-01

The following are only the Rules published in the Federal Register after the published date of Title 10.

For a complete list of all Rules, Proposed Rules, and Notices view the Rulemaking tab.

  • 2014-07-11; vol. 79 # 133 - Friday, July 11, 2014
    1. 79 FR 40542 - Energy Conservation Program for Consumer Products and Certain Commercial and Industrial Equipment: Test Procedures for Residential and Commercial Water Heaters
      GPO FDSys XML | Text
      DEPARTMENT OF ENERGY, Office of Energy Efficiency and Renewable Energy
      Final rule.
      The effective date of this rule is July 13, 2015. Compliance will be mandatory starting one year after the publication in the Federal Register of a mathematical conversion factor to convert from the existing efficiency ratings to efficiency ratings under the test procedure adopted by this final rule, or December 31, 2015, whichever is later. The incorporation by reference of certain publications listed in this rule is approved by the Director of the Federal Register as of July 13, 2015. Other publications referenced were approved on March 23, 2009, and May 16, 2012.
      10 CFR Parts 429, 430, and 431

Title 10 published on 2014-01-01

The following are ALL rules, proposed rules, and notices (chronologically) published in the Federal Register relating to 10 CFR 431 after this date.

  • 2014-09-16; vol. 79 # 179 - Tuesday, September 16, 2014
    1. 79 FR 55538 - Energy Conservation Program: Energy Conservation Standards for Packaged Terminal Air Conditioners and Packaged Terminal Heat Pumps
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      DEPARTMENT OF ENERGY, Office of Energy Efficiency and Renewable Energy
      Notice of proposed rulemaking (NOPR) and public meeting.
      DOE will hold a public meeting on Wednesday, October 29, 2014, from 9 a.m. to 4 p.m., in Washington, DC. The meeting will also be broadcast as a webinar. See section VII, “Public Participation,” for webinar registration information, participant instructions, and information about the capabilities available to webinar participants. DOE will accept comments, data, and information regarding this notice of proposed rulemaking (NOPR) before and after the public meeting, but no later than November 17, 2014. See section VII, “Public Participation” for details.
      10 CFR Part 431