How to determine the voltage of a pool pump motor

How To Determine Pool Pump Motor Voltage

This guide will show you how to determine your pool pump motor’s voltage in just a few easy steps. If you install a whole new pool pump, replace its motor, or even install a new automation system, it’s crucial to know your pump motor voltage. This is because pool pump motors are made to be dual voltage; they accept 115V and 230V, or the motor may only accept one of the other.

Time needed: 15 minutes.

Determining Dual Voltage Motor Wiring

  1. Shut Off Power

    Turn off power to the pump at the Breaker

  2. Remove Motor Endcap

    To access the motor’s terminal board, remove the motor’s endcap

  3. Find terminal board to check voltage selector

    A. Knob – the notched cutout will display the selected voltage setting
    B. Jumper – For older motors, use a Jumper, which will fit over one or two leads depending on the voltage.

  4. Check Motor Label Wiring Schematic

    Use the motor’s wiring diagram to determine voltage. If the jumper or knob is missing, use the wiring schematic on the motor label to determine the motor’s voltage.

  5. Is Circuit Breaker a Single or Double Pole?

    Check Breaker – if the pump’s circuit breaker is a single-pole, it’s a 115V setup; if the pump is on a double-pole breaker, it is usually a 230V circuit. For double-pole breakers, confirm that both poles are wired. If only one pole is wired, the circuit may be modified to 115V.
    Is Breaker a Single or Double Pole

  6. Check Timer Voltage

    Common mechanical timers like these Intermatic models are single voltage. Check the timer’s door sticker for its voltage output.

  7. Use Multimeter to Test Circuit

    How To Use a Multimeter to Test a Pool Pump Motor – Voltage

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2 thoughts on “How To Determine Pool Pump Motor Voltage

  1. I couldn’t figure out if the voltage of my pump was 115v or 230v. These are the best instructions I’ve seen for determining the voltage of my pool pump. Thank you, InyoPools!

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