AS C74-1936

This specification applies to fractional horse-power electric motors (including fan motors) of any continuous rating less than one horse-power per 1,000 revs. per minute having windings insulated with Class A or Class O material. This specification applies to D.C. and to A.C. motors of commutator and induction type, but does not apply to "universal" motors (i.e. motors capable of operating on both A.C. or D.C. circuits).