Electrical Specifications Amperage: 20 Amp ; Voltage: 120/277 VAC ; Dielectric Voltage: Withstands 1500V for 1 minute ; Overload UL20 Test: 100 cycles of OL at 4.8 times rated current ; Temperature Rise: Maximum 30ºC rise ; Endurance: 50,000 cycles minimum ; AC Horsepower Ratings: 1HP-120V, 2HP-240V, 16A Max^^Environmental Specifications ; Flammability: Rated HB or better UL94 ; Operating Temperature: -40ºC to 65ºC ; Storage Temperature: -40ºC to 65ºC^^Material Specifications ; Base Material: Thermoplastic ; Cover Material: Thermoplastic ; Strap Material: Galvanized Steel ; Toggle: Antimicrobial Urea ; Contacts: Silver-Alloy ; Terminal Screws: Brass 8-32 ; Grounding Screw: Steel 8-32 ; Ground Clips: Brass^^Mechanical Specifications ; Terminal Accom.: 14-#10 AWG back wired; #14-#12 AWG side wired ; Terminal ID: Brass-Hot Black-Hot White-Neutral Green-Ground ; Product ID: Ratings are permanently marked on device^^Standards and Certifications ; NEMA: WD-1 & WD-6 ; UL Fed Spec WS896E: File #E7458 ; UL Standard: UL 20 ; CSA C22.2 No. 111: File #152105 ; NOM: NOM-ANCE ; JIS Z 2801:2000: Test for Antimicrobial Activity and Efficacy ; ISO 22196: Measurement of Antibacterial Activity on Plastics and Other Non-Porous Surfaces