1522 Pump Start Relay with Enclosure 3 HP / 110V / 220V 24V Coil for Irrigation Features: Application Widely applicable for various types of pump with a circuit capable of delivering not more than 5000 RMS symmetrical amperes. 240 Volts maximum, when protected by fuses or beakers rated maximum 100 Amps. 110 VAC or 24 VAC Coils Available- Provides for a variety of applications up to 2 HP. Function This Pump Start Relay helps automatically synchronize your pump for watering with your irrigation timer. It activates a pump every time a watering zone is triggered from a timing controller or level switch. Enclosure Box .