Difference between 2 wire and 3 wire

Support forum for submersible pump operations, specifications, and their parts.

Difference between 2 wire and 3 wire

Postby lwparchive » Tue Nov 06, 2012 4:58 pm

Two wire or three wire 4" submersible pumps. Whats the advantage and disadvantage here?


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Re: Difference between 2 wire and 3 wire

Postby dlamp67 » Wed Mar 27, 2013 11:46 am

Three wire pumps require a control box that will contain your start relay and your start/run capacitors. Two wire pumps house the capacitors within the motor housing. If the capacitor goes bad on a two wire pump, then you have to pull the pump and replace the motor. If the capacitor fails on a three wire pump, you just replace the capacitor in the control box.
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