Leviton 8895-W High Current Smartlock GFCI, Contact rating GFCI: 20 Amp, 125 Volt, White Adds ground fault protection to heavy equipment powered through 3-and-4 wire circuits grounded with neutral Meets or exceeds UL 2003 Code Requirements for increased surge immunity, corrosion resistance, resistance to false tripping and diagnostic indication for line-load wiring reversal Exclusive, patented lockout-action: RESET button is blocked if GFCI protection has been compromised, eliminating the risk of end-users incorrectly assuming that a reset GFCI is providing ground fault protection when it actually is not Test and Reset buttons confirm proper operation Ideal for use with spas, heater packs, high pressure washers, industrial mixers, and other equipment