Intermatic 24hr Timers Available in T101, T103, T104 These heavy duty mechanical time switch is designed for industrial, commercial and residential applications. These time switch has the highest horsepower ratings in the industry for loads up to 40 amps resistive T 101 - 120v loads only - 40amp capacity - 120v clock motor T 103 - 120 and 240v loads - 40amp capacity - 120v clock motor T 104 - 120 and 240v loads - 40 amp capacity - 240v clock motor