For use where electrical connections need protection from water and/or dust entrance to the contacts or the wiring compartment. Not just "watertight"; Waterprooffor Washdown Duty: DurORing Sealing. Specifically designed for wet environments with our unique DurORing™ sealing system. Unit is watertight mated or unmated. Eliminates need for costly "weather boots" or "adapters". Compact Size. "Lockout Ready" plugs have padlock access hole in front. (30/50A).