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Testing an Electric Motor Circuit


By Dave Rongey - Summary:

Steps for Testing Electrical Power for a Pump Motor Circuit – Work you way back towards the controls and power source or electrical panel. It sounds like you lost one of the power legs of the motor circuit.

Testing an Electrical Circuit for a Pump Motor

Electrical Question: There is no electrical power to a sprinkler pump.

  1. Here are the steps that I have taken:
  2. The pump partially ran for a few seconds and then stopped,  I repeated with same results.
  3. Changed starting capacitor, same results and then pump stopped working.
  4. I bypassed the timer and hooked directly to pump, pump did not work, I put in new pump and it did not work.
  5. I changed circuit breaker.
  6. Still no power to pump. Just one 220Volt on the circuit.

What else can I try?

This electrical question came from: John, a Homeowner from Indian Harbor Beach, Fl

Dave’s Reply:
Thanks for your electrical question John.

Steps for Testing Electrical Power for a Pump Motor Circuit

Testing an Electric Motor Circuit

  1. John I would recommend that you start from the pump.
  2. Test for both legs of power of the motor circuit (you mentioned that this is a 220 volt pump) .
  3. Work you way back towards the controls and power source or electrical panel.
  4. It sounds like you lost one of the power legs of the motor circuit.
  5. Also, make sure you have 220 volts at the circuit breaker at the electric panel.

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