Safety disconnect switches with interlock receptacles have keyed pin/socket receptacles where power cables plug in to draw power to equipment or machinery. Their interlock receptacles prevent mismatched connections and have safety features that restrict power from flowing and prevent plugs from being removed while powered. Safety disconnect switches have manual shutdown mechanisms that open and close multiple circuits to disconnect and connect power from multi-load industrial equipment, machinery, and electrical systems to protect operators from shocks. They're used in lockout/tagout operations and service entries to disconnect power from high-amperage electrical systems in the event of an emergency and to perform maintenance. Their enclosed constructions protect internal components against impacts, debris, and dust.