3 Wire Well Pump Testing

After opening up the pump controller i did some head scratching.

3 wire well pump testing.

Single phase submersible pump control box wiring diagram 3 wire submersible pump wiring diagram in submersible pump control box we use a capacitor a resit able thermal overload and dpst switch double pole single throw. In this video i go over the differences of a 2 wire and a 3 wire submersible well pump this is associated with the starting components for the pump and whet. Three wire pumps may have a higher starting price but you re paying for the ability to replace individual parts of the pump as well as a longer life span on the pump itself. If you desire a cheaper starting price quick and easy installation and are fine with replacing the entire pump if something major goes wrong then an all in one 2 wire well pump may.

Collection of 3 wire submersible pump wiring diagram. Inside is the relay and start capacitor. Replace all burnt. On 3 wire motors measure the resistance of yellow to black main winding and yellow to red start winding.

Measure the resistance from line to line. Click on the image to enlarge and then save it to your computer by right clicking on the image. A 3 wire pump actually has four wires going into the control box and 4 wires going to your pump. Here is the complete guide step by step.

If so go with a 3 wire well pump. Testing a franklin electric qd quick disconnect box qd boxes are designed for use with 3 wire single phase submersible motors from. The wiring connection of submersible pump control box is very simple. I found that the wiring for the original 3 wire pump had been reconfigured to that of a two wire pump eliminating the need for a controller.

The wires heading to the well s pump motor connect to terminals with a start run and neutral function. The chart next to the wiring diagram gives the well pump s operating voltage. Troubleshooting inside the box is made simple by the control components automatically disconnecting from the system when the lid is removed. It s a 4 franklin 1 2 hp 110 ft.

These are usually labeled s r and n the wires connected to the green screw ground the well system. If all ohms values are normal tables 13 22 24 25 27 in aim manual the motor windings are neither shorted nor open and the cable. Troubleshooting submersible well pumps 101. Benefits of a 2 wire over a 3 wire pump.

In h2o s experience we find the 2 wire pumps to be more reliable and robust. 3 wire submersible pump wiring diagram well pump wiring diagram and 3 wire submersible. Measure the resistance line to line for all three combinations. Below is a control box.

Step 4 visually inspect the control panel s wires wire connections relay and capacitor.