The self-test GFCI conducts an automatic test every three seconds, ensuring it's always ready to protect. If the device fails the test, the indicator light flashes to signal that the GFCI should be replaced. It also has our proven Safelock protection feature, if critical components are damaged and protection is lost, power to the receptacle is disconnected. Auto-ground clip assures a positive ground to metal boxIvory colorPatented shutter system helps prevent improper insertion of foreign objectsFeed-thru wiring configuration allows GFCI to protect downstream receptaclesSide or internal screw-pressure-plate back wire with 10-14 AWG solid or stranded copper wireTwo back-wire holes per terminalGround screw has back-wire clamp for easy installation10kA short circuit ratingHigh impact-resistant thermoplastic constructionHidden tamper resistant shutters protect against electric shock