UL & CSA approved for Class I, Group D; Class I, Group D, Class II, Group F & G; Class I, Group C & D, Class II, Group F & G. Totally enclosed heavy guage steel and cast iron construction. Single and Three Phase designs. 60Hz & 50Hz data included on the nameplate. 1.0 Service Factor. Super-E® explosion proof motors have NEMA Premium® efficiency and 3 year warranty. Fixed speed sine wave operation only.