The Answer Is Safety. Two-pronged outlets are referred to as “ungrounded,” while three-pronged are grounded.Grounded Outlet 1-48 of 625 results for "grounded outlet" Results Amazon's Choice UltraPro GE Duplex Heavy-Duty Receptacle, White, Wall Outlet,What Is a Grounded Outlet? A grounded outlet is an electrical outlet that is designed to protect individuals from electrical shocks by redirecting electricity into the A two inch grounding or bonding bushing used to connect a grounding wire to a conduit or fitting How To Ground An Outlet How to Ground Outlets If you have a ground wire, usually a bare copper or green wire, in a cable or conduit arriving in the box, it may or may not be grounded.