Specification Grade - Dead-Front/Blank Face GFCI is UL Listed, fully compliant with all latest UL 943 (4th edition) Class A GFCI, UL 498 requirements and UL 508 for motor control switch horsepower rating, including the latest self testing requirements. GFCI lock-out function protects from miswired line-load connections and GFCI circuitry damage. Compact design provides maximum wiring room in “grounded box” applications. Device and wallplate mounting screws are captive, speeding installation time. Includes standard size unbreakable wallplate.