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The Advantages of a 3-Wire Pump Over a 2-Wire

All electrical components have a life span, and are subject to fatigue under normal operating conditions, and on occasion will require replacement. More often than not, a simple control box or panel replacement will get the pump up and running. 

Most 4″ submersible well pumps used in residential applications come in 2 different configurations, 2-wire or 3-wire. With the 3-wire pump, the motor starting components such as, starting capacitors, running capacitors, relays, and thermal over loads, are contained in a control box, or panel, mounted on a wall, or post, above ground.

In the case of a 2-wire pump, the starting components are built into the motor, which is suspended off the bottom of the pump, deep in the well.

In most instances, the replacement of an above ground, control box, or panel, for a 3-wire pump, can be completed in less than 45 minutes. The starting components in a 2-wire pump motor however are non-replaceable, they are built into the motor, therefore, requiring the pump to be pulled out of the well, and the motor replaced. Due to the, time, costs and inconvenience, of having to pull the pump from the well to affix the repair, the 3-wire pump deserves your consideration. Additionally, the 2-wire pump is only made for the 1/2, through 1 1/2-horsepower pumps, the larger horsepower pumps such as 2 horsepower through 200- horsepower, are not manufactured in a 2-wire desi.

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Erica Bales