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.

  • 2014-10-01; vol. 79 # 190 - Wednesday, October 1, 2014
    1. 79 FR 59090 - Energy Conservation Program for Certain Commercial and Industrial Equipment: Energy Conservation Standards for Walk-in Coolers and Freezers; Air-Conditioning, Heating, & Refrigeration Institute Petition for Reconsideration
      GPO FDSys XML | Text
      DEPARTMENT OF ENERGY, Office of Energy Efficiency and Renewable Energy
      Petition for reconsideration; agency response.
      This denial is effective on October 1, 2014.
      10 CFR Part 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.

  • 2014-10-21; vol. 79 # 203 - Tuesday, October 21, 2014
    1. 79 FR 62899 - Energy Conservation Program for Certain Commercial Industrial Equipment: Conservation Standards for Commercial Pre-Rinse Spray Valves
      GPO FDSys XML | Text
      DEPARTMENT OF ENERGY, Office of Energy Efficiency and Renewable Energy
      Extension of public comment period.
      The comment period for the framework document for commercial pre-rinse spray valves, published on September 11, 2014 (79 FR 54213) is extended to November 12, 2014.
      10 CFR Part 431