3 Wire Well Pump Vs 2 Wire

The two wire pump does not use a control box.

3 wire well pump vs 2 wire. If your application doesn t require such a large well pump then it comes down to a few purchase decisions. 2 wire motors have two black and a green wire. Everything is built inside the motor of the pump. In a 2 wire pump the relay and start capacitor is located in the pump itself and the pump is in the well.

The main difference between 2 wire and 3 wire well pumps is characterized by where the starting components for the motor are located. Simply put if the deep well pump you need has a motor larger than 1 5 hp the safest bet is to go with a 3 wire well pump so it starts and runs properly. The ground wire is not counted in the terminology. Control boxes are usually mounted on a wall above ground.

In this video chris explains the difference between the two most common submersible well pump motors. Three wire well pumps house the starting components starting capacitors running capacitors relays and thermal overloads in a control box or panel. The main difference is the three wire pump uses a separate control box which includes a capacitor and relay to start the pump. 3 wire motors have a black red yellow and a green wire.

The control box is located inside your house or pump house. Subscribe ring the bell. In a 3 wire pump the relay and start capacitor is not in the pump but usually in your basement inside a control box. Technically speaking your pump capacitor needs electricity to start.

The pump of course is still in the well.