Attributes . Tough Designed, Reliable, for Most Grueling Conditions, Provides Dead Front Housing for Circuit Breakers, Molded Case Switches, , Motor Circuit, Meets UL 50, Breaker Operation without Removing Cover, UL, CSA, Square D Equipment with R or RB Suffix, NEMA 3R Rainproof Construction, Bolt-On Hubs RB, Devices Will Accept 3/4 in. Through 2-1/2 in off-Center Conduit Thread Openings, Elongated Mounting, Load Center Hub, 2.50 in, Rainproof . Names