Tuesday, December 6, 2016

Submersible Pump Control Box Wiring Diagram For 3 Wire Single Phase

Today i am hear to write about submersible pump control box wiring diagram , in this post you will complete understood about 3 wire submersible pump wiring diagram which is an single phase submersible pump motor. Why we called a single phase submersible motor a 3 wire submersible, that we also know that we have two wire in single phase power supply.
As you know that we have two types of winding in a single phase motor and these coils have also two starting and finishing ends, So we connect one one end of each coils and make a common point which know also with name of common point. And the other ends called starting and running terminals or connection. So we have 3 wire terminals or wire which out form the motor , that's why we called this 3 wire motor.
In the post you will completely learn about single phase submersible pump control box wiring diagram, and this diagram not to hard to understand like there own diagram which is mostly available in control box back side.

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). The wiring connection of submersible pump control box is very simple. Here is the complete guide step by step.

  • First of all switch of the main circuit breaker in your distribution board, this for that reason that you can work safely and protect himself form electric accidents.
  • Then connect the supply to input wire connectors. 
Now if the box is not wire then flow the steps and if the box is wired then last steps is for you.

  • After that get connection from wire connectors and then connect your neutral and Line wire (hot wire / phase) to the double pole single throw switch as i shown in the below diagram.
  • Then get hot wire connection form DPST switch and connect to the reset able thermal overload protector. And form overload protector connect this (black wire) to one of the output wire connector.
  • Now get your neutral wire (blue) form the switch and connect to capacitor, and form same terminal of capacitor connect it to one of the output connector.
  • Then connect a wire form other free side of capacitor terminal and connect to the one of the out wire connectors which i shown with red or brown color in diagram.
  • In 1 number connector connect your ground or earth wire as i shown in diagram with green color.

Now you have 4 out put wire connector, in which 1 number for earth connection, 2 number for starting terminals because this wire comes form capacitor, 3 number for running wire for motor and 4 number for common.
So you need to connect the running, starting and common wire of submersible pump to control box, so mostly in submersible pump 3 wires the Black color wire is common, Blue is Running and Brown or red for starting, But these color can be change or may be in your submersible pump different color wire are used. 

First if you know about the starting, running and common wire then connect it box connector as i shown in the below single phase 3 wire submersible pump box wiring diagram.

submersible pump control box wiring diagram
single phase submersible pump starter wiring diagram

Now if you did not know about the star, run and common wire in your pump motor then follow the below compressor terminals identifying tutorial and same follow the steps to find out identify submersible pump wires start,run and common. (Note that identify compressor terminals and submersible wire method is same)

Also read
How to identify start , run and common in single phase motor or compressor?
How to control a single phase motor using circuit breaker?
How to wire resetable overload?
How to control and wire a single phase motor with contactor?

In the above wiring diagram i shown the complete method of submersible pump control box wiring and installation diagram. Now if you have any question regarding single phase submersible pump starter wiring diagram then you can use below comment section.


  1. concept is good.
    I would like to have circuit with contactor , Ammeter voltmeter, starting switch with indicator


  3. Another great idea to increase our knowledge.
    thank you sir

  4. The circuit did now show any disconnect for the starting winding.

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