Intermatic WH40 Mechanical Water Heater Timer Switch BRAND NEW! NO SEALED INSIDE. With the easy-to-set "Yellow Dial", these time switches allow for basic control of electric hot water heaters. These time switches offer a minimum on/OFF time of one hour and are available for 208-250 VAC applications. With the proven reliability of our mechanical line, these time switches provide dependable electric water heater control. Features Enables shifting electricity use into off-peak hours to reduce energy costs Convenient external override switch 3 W maximum power input Combination 1/2 to 3/4 in nominal knockouts one on back and on each side and two ON bottom Time switches regulate electric water heaters 2 hp at 125 VAC/5 hp at 240 VAC Enables shifting electricity use into off-peak time periods to reduce utility cost Specification Horsepower 2 hp, 5 hp Mounting Type Surface Number Of Poles 2 On/Off Ratio 12 Minimum Order Qty 1 Order Interval 1 Amperage Rating 40 A Catalog ID INTWH40 Contact Form DPST Dimensions 7-3/4 in H x 5 in W x 3 in D Electrical Connections Teeter Enclosure Type NEMA 1 Temperature Rating -40 to 130 deg F Time Setting 1 Voltage Rating 208 to 277 VAC Standard Approvals RoHS Compliant, cULus Listed, CSA, cCSAus Certified, HVACR Approved Includes (3) Sets of ON/OFF Trippers