C & I Enclosures Type 4 Painted Single Door Enclosures are UL Listed for either indoor or outdoor use to provide a degree of protection against falling rain, splashing water, and hose-directed water; undamaged by the formation of ice on the enclosure. Fabricated in accordance with U.L. specifications from code gauge material. Provided with an ANSI 61 gray polyester powdercoating inside and out over paint grip galvanized steel.