How to Wire an Irrigation Pump Motor: Determining the Pump Motor Circuit Size, Electrical Codes and Wiring a Pump Motor.
Electrical Question:I installed a new 1.5 HP irrigation pump and it throws the circuit breaker.
I installed a new 1.5 HP irrigation pump, set the back voltage selector switch to 115 Volts also run the timer/relay off the same feed. the pump would run for a few minutes, then throws the 20amp breaker.
After looking at the wire it was 14 gauge and the box is approx. 40’away so I ran some 10 gauge and replaced the breaker with a new 20amp and its doing the same thing.
I understand running the timer off that line is incorrect but timer plugs in the wall with a 24 volt transformer would that be enough to throw the breaker?
This electrical wiring question came from: Steve located in Merritt Island, Florida.
Application: Wiring an Irrigation Pump Circuit.
Tools Required: Basic Electricians Pouch Hand Tools, Voltage Tester, trenching equipment or shovels.
Determining the Pump Motor Circuit Size A typical 1 1/2 HP motor configured for 115 volts will require a 20 amp circuit. However check the specs on the motor nameplate for specific information. If a timer is being used to control the pump then the contacts of the timer must be rated for the voltage and amperage load of the motor. As stated in this question, it would be best if a control timer is wired as part of the pump circuit.
Code compliance for install a irrigation area pump motor is very important.
Verify the circuit requirements for a 120volt 20amp or as specified by the pump motor installation manual.
Electrical wiring should be sized according to the required circuit size.
Protection for the electrical wiring should be provided. For example, installing underground electrical conduit at the required depth for the pump motor application.
Contact the local building authority in your area of Florida about the codes specific to your project.