Coverage of the Energy Policy Act of 1992.

The Energy Policy Act of 1992 (EPAct 92) was the first major energy law to require minimum, nominal, full-load motor efficiency ratings. 

It applied specifically to "general purpose, T-frame, single speed, squirrel cage, induction type; 230/460-V, NEMA Designs A or B, continuous rated, 60 Hz, from 1 to 200 hp, 2-, 4- and 6-pole (3600-, 1800- and 1200-rpm), open and enclosed"; in short, most of the motors commonly specified for industrial equipment. 

The motors, which came to be known as "EPAct motors", are still commercially available. Their nominal efficiencies are between one and four percentage points higher than those of the so-called "standard-efficiency motors" that had dominated the market for decades.
EPAct 92 doesn't address special-purpose motors or motors of sizes, frames, speeds or voltages other than those listed.
Стандарти на ефективност за EU

Стандарти на ефективност за USA

Стандарти на ефективност за Бразилия

Стандарти на ефективност за Австралия
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