NEMA 3RX enclosures are constructed for indoor or outdoor use. NEMA 3RX enclosures provide the same protection as NEMA 3R enclosures, but with an added level of corrosion protection. Find a range of convenient sizes and styles of NEMA 3RX enclosures and junction boxes molded from polycarbonate plastic for electrical applications. Need a different NEMA rating? View all our NEMA enclosures here.