Transformer Cooling Fan Blade Diameter 20 in Air Flow 5 000 cfm Voltage 208-230/460V AC 60 Hz Phase 3 Fan Mounting Type Guard Mount 1.1-1.2/0.6 Amps 1 725 RPM RPM Motor HP 1/4 hp Max Ambient Temp 104 Degrees F Bearing Type Ball Number of Blades 4 Blade Material Cast Aluminum Fan Cord Length 15 ft Guard Material Steel 23 in Height Width 23 in 13 5/16 in Depth Mounting Eye O.C. 17 3/4 in Motor Enclosure Totally Enclosed Air-Over Motor Insulation Class B Frame 48Y Yoke Mount