ENERGY EFFICIENCY
TOPIC: MOTOR EFFICIENCY
ISSUE:
Motor efficiency requirements of Energy Policy Act of 1992 (EPACT) in effect
since October 24, 1997.
BACKGROUND:
EPACT requires that standard motors manufactured on or after October 24, 1997
have a minimum efficiency corresponding to *table below. Motors manufactured
prior to October 24, 1997, can have a lower efficiency and can be sold at any time.
VA, HVAC Standard Detail No. 15000-50, `Energy Efficient motors', was revised
in January, 1997, complying with National Electrical Manufacturers Association
(NEMA) 1993 nominal efficiency values meeting the EPACT requirements.
HP
NOM. EFF.
HP
NOM. EFF.
HP
NOM. EFF.
1.0
82.5
10
89.5
50
93.0
1.5
84.0
15
91.0
60
93.6
2.0
84.0
20
91.0
75
94.1
3.0
86.5
25
91.7
100
94.1
5.0
87.5
30
92.4
125
94.5
7.5
88.5
40
93.0
150
95.0
* Table is based on open or enclosed 4-pole (1800-rpm) motors published in a supplement to
ASHRAE Journal `Practical Guide to Electrical Engineering for HVAC&R Engineers' in Nov. 1996.
RECOMMENDATIONS:
1. Use EPACT (or better) motors for replacements as well as new projects.
FOR ADDITIONAL INFOR MATION:
Contact Satish Sehgal at 202-565-5032, Kurt Knight at 202-565-4980, or Sat
Gupta at 202-565-5268.
4 MARCH 1998
FM-187C-DA86
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