Square D equipment with RB suffix, designated Rainproof (NEMA 3R rainproof construction), utilizes bolt-on hubs listed

RB devices will accept 3/4 In

through 2-1/2 In

bolt-on hubs without the use of reducers

Off-center conduit thread openings and elongated mounting holes provide quick and easy adjustment to eliminate costly conduit offsets and bends

For use in Square D load centers, CSED devices and safety switches

Type B

UL (Underwriter's Laboratories) and CSA (Canadian Standards Association) safety listed