The 208-277 Volt, DPST, 40 Amp, 24 Hour Mechanical Time Switch, turns heavy-duty appliances on and off at set times. Set multiple on/off settings for your water heater, indoor and outdoor lighting, signs, air conditioning, pumps, and other commercial, industrial and residential applications. Features a 40 Amp contact switch with robust motor and heavy-duty gear train is enclosed in an outdoor rated, NEMA 3R, industrial-grade lockable box for safety and durability. Has up to 24 on/off settings per day for flexible programming, with segment pins that are permanently attached so they won't get lost. Programming can be set in 30 minute intervals for multiple on/off events, which maximizes energy savings and controls electricity costs by only using power when it's needed. Also includes a manual override lever which temporarily suspends switch operation without affecting the set schedule. The Double Pole, Single Throw (DPST) indicates the mechanical timer can control two circuits (like two sets of lights, or a set of lights and a sign). The 208-277 Volt, DPST, 40 Amp, 24 Hour Mechanical Time Switch is CSA Certified for quality assurance and meets UL standard 917. Rated for most loads up to 5-horsepower (28FLA), 40 Amp resistive, general use, and tungsten from 208 to 277-Volt providing direct 24 hour time switch control. The Woods brand of timers and home controls bring simplicity to your life, by maximizing convenience, security and energy savings.