400 to 550 V 2” & 2 1/2” Diameters 6.3 to 160 V 200 to 350 V 400 to 550 V 3” & 3 1/2” Diameters 6.3 to 160 V 200 to 350 V 400 to 550 V 0.92 0.80 0.78 0.93 0.81 0.79 0.95 0.85 0.82 0.94 0.85 0.83 0.95 0.87 0.83 0.96 0.88 0.84 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.05 1.17 1.20 1.04 1.13 1.17 .