distribution transformer

(i) has an input voltage of 34.5 kilovolts or less;

(ii) has an output voltage of 600 volts or less; and

(iii) is rated for operation at a frequency of 60 Hertz.

(B) The term "distribution transformer" does not include—

(i) a transformer with multiple voltage taps, the highest of which equals at least 20 percent more than the lowest;

(ii) a transformer that is designed to be used in a special purpose application and is unlikely to be used in general purpose applications, such as a drive transformer, rectifier transformer, auto-transformer, Uninterruptible Power System transformer, impedance transformer, regulating transformer, sealed and nonventilating transformer, machine tool transformer, welding transformer, grounding transformer, or testing transformer; or

(iii) any transformer not listed in clause (ii) that is excluded by the Secretary by rule because—

(I) the transformer is designed for a special application;

(II) the transformer is unlikely to be used in general purpose applications; and

(III) the application of standards to the transformer would not result in significant energy savings.

(i) has an input voltage of 34.5 kilovolts or less;

(ii) has an output voltage of 600 volts or less; and

(iii) is rated for operation at a frequency of 60 Hertz.