The 3 Phase Submersible Pump Control Box Wiring Diagram contains all the necessary information for setting up and wiring your submersible pump. It includes diagrams of the power supply, control box, and motor as well as detailed instructions on how to connect each component. Not only a contactor but also install the thermal overload relay which will protect the motor from burning in case of overcurrent flow. When dealing with submersible pumps, having a concise wiring diagram is essential to ensuring your equipment is safe for use. By following the. The wiring diagram for a 3 phase water pump typically includes three hot wires, one neutral wire, and one grounding wire. These wires are connected to the pump motor, control.