How to Wire Up a Well Water Pressure Switch | Hunker When the tank reaches its peak pressure, typically at 60 pounds per square inch, the switch cuts the electrical power to the water pump. As water is used, the pressure in the tank decreases. When the pressure falls to 40 psi, the switch energizes the pump circuit and the cycle repeats itself. How to Wire a Pressure Switch for Air Compressors Jan 13, 2012How to Wire a Pressure Switch for Air Compressors. Often times, out of habit, electricians or installers wire directly to the compressor motor. DO NOT WIRE DIRECTLY TO THE MOTOR. In a fire protection air compressor the pressure switch is the brain that tells the compressor when to turn on and turn off and the brain needs power. How to Wire a Pressure Switch for a Water Pump | Hunker Loosen the four screw terminals on the pressure switch and note that there are two sides to the contacts. Each side of the spring loaded contacts act like a simple switch. In other words the two contacts act like a double switch that open or close when the system calls for water pressure.
Related with stage two pressure switch wiring diagram