Enclosed Circuit Breaker, Type Bolted Enclosure, Constructional Feature Explosionproof, Breaker Type JD, Trip Type Non-Interchangeable, Voltage Rating 600 VAC, 125/250 VDC, Current Rating 250 Ampere, Interrupting Rating 18 Kiloampere at 600 VAC, Number of Poles 2, Hub Size 4 Inch, Enclosure Class I Div 1 and 2 Group B C D, Class I Zone 1 and 2 Group IIA IIB, Class II Div 1 and 2 Group E F G, Class III, NEMA 4/4X/7BCD/9EFG, Enclosure Material Sand Cast Copper Free Aluminum, Enclosure Finish Grey Epoxy Powder Coated, Shaft/Handle Material Stainless Steel, Approval UL, CSA, Cover Bolt and Hinge Material Stainless Steel