As mentioned earlier, it is important to consider the type of power your well pump equipment requires. Most residential pumping equipment is single phase 230 volts, however, some small pumps in the USA may use 120 volts single phase. Larger pumping installations may require 208, 230 volt or 480 volt 3-phase power.

It specifically tests the motor windings insulation. Depending on the insulation class of the motor, a good motor could measure well into Tera Ohms or 1,000,000,000,000 ohms! This is an insulation test of motor windings, commonly referred to as megging, to megger, or to meg a motor.

Since many submersible motors are designed to operate on either 50 or 60 hertz power, many motors are rated for 380- or 460-volt operation from either source. Many submersible motor manufacturers also supply motors capable of operating on much higher voltages than the lower voltage systems below 600 volts.

3.2-amper

how to tell if my well pump is 110 or 220

1. Start at the Breaker Panel. The main breaker panel should have a wiring schedule handwritten inside the front door panel.
2. Determine Number of Wires.
3. Check for Voltage.
4. Replace a Two Wire Pump.
5. Replace a Three Wire Pump.
6. Educate Yourself Before Hiring a Professional.

Single phase 220v has 2 legs and a ground. To the OP, it’s likely a 220v pump, most are, and they may have used a generator for powering it when they needed it. No, it won’t be good to run it on 110v if it’s supposed to have 220v.

A black and red wire, two black wires, or a black and blue wire, or red and blue wire could indicate that it is wired for 220 V. But that color code system only applies in North America. In other words: a plain white wire (or colored wire marked with white tape) indicates a neutral, which means 110 Volts.

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.

There are two classifications of insulated multi-conductor cable used in submersible pump applications: submersible pump cable and underground feed cable, known commonly as UF.