FEATURES: •Frame Construction:56 Frame-Rolled Steel.143-256TC-Cast Iron “Blue Chip” •Thermal Protection:56 Frame-Auto Overload,143-256TC-T-Stats •Class/Group:56 Frame-Class I, Groups C & D,143-256TC-Class I, Group D •Temperature Code:56 Frame-T3B;143-256TC-T3B •Conduit Box:56 Frame-Shipped Loose;143-256TC-Installed •Service Factor:56 Frame-1.0 (unless otherwise noted);143-256TC-1.0 (unless otherwise noted) 1.15 service factor •Suitable for Group C