Question: what is the difference between a 2 wire and a 3 wire well pump?
Answer: The difference between a 2-wire and 3-wire pump is based on the type of motor that is used. ... It is called a “3-wire” due to the three “hot” leads, though there are actually four wires when you count the ground wire. The 2-wire motor requires no control box because is does not use a starting capacitor.