Designed for industrial, commercial and residential applications. The Heavy Duty 40 Amp 208/277 Volt Timer has the highest horsepower ratings in the industry for loads up to 40 amps resistive from 208/277 volts providing direct 24 hour time switch control. This series provides from 1 to 12 ON/OFF operations daily with minimum ON/OFF times of 1 hour. This products comes with the timer mechanism, metal case and one On and one Off tripper.