Browse dependable NEMA 3S enclosure solutions for indoor or outdoor use. NEMA 3S boxes offer the same protection as NEMA 3 enclosures, but with added protection for external mechanisms to remain operable with ice formation. A variety of sizes and styles of NEMA 3S enclosures are available in polycarbonate plastic for industries such as factory automation, agriculture, alternative energy and more. Looking for a different NEMA rating? View all NEMA enclosures here.