3 Wire SS Submersible Pump Assembly
Note: 1PH only. The ground wire is not counted as a wire and is why 3 wire pump assemblies contain 4 wires.
Franklin 3 wire pump assemblies have 3 power wires, 1 yellow, 1 black, 1 red and 1 green ground wire in the harness on the Franklin submersible motor. A 3 wire submersible motor does require a control box to operate. There is no way to make a 3 wire pump operate without the control box and damage could occur if attempted.
Some people years ago believed the ground was not necessary and did not install one to the pump. When you have only three wires at the top of the well that is no guarantee its a 2 wire pump, the ground may not have been installed and it still could be a 3 wire pump. Wires for a 3 wire pump always come from the control box. Remember, well wire may not be the same color where those wires attach to the submersible motor. This information is only provided as a suggestion and is not to be used as a professional guide.