Doodlebug Pump -- FAQ

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Submersible Pump Electrical Power

How is electricity supplied to a submersible pump?

Like all electrical appliances pumps require a certain amount of current at a certain amount of voltage.

Submersible motors can be supplied in 115 Volt and 230 Volt configurations. The motors are also configured to use either 2-wire or 3-wires to supply this power.

Three wire motors use what's called 3- wire with "ground". Two wire units use 2-wires with ground or they can also use 3 wires with ground by eliminating one wire.

To ensure the proper amount of power reaches the pump unit you have to use the proper size submersible electric cable. Depending on horsepower requirements and the depth of the pump, this is typically #12 or larger wire. Once the pump is selected a wire chart can be consulted to determine the correct gauge

Submersible pump motors typically use 230V AC current, Single phase. This means that you have two wires from your circuit breaker or fuse box. If you measure the voltage on both wires with a voltmeter you get 230 volts. If you only measure 115 volts, then you would be limited to a 115 volt pump.

Keep in mind voltages vary from location to location. Your 230 volt source could measure up to 240 volt and likewise the 115 volt source could measure up to 125 volts.

If you have the option, it is always better to run your pump at a higher voltage. This allows you to use a smaller electrical cable and the motors generally run more efficiently.

In a three wire unit, the two wires are routed into the control box and they are known as "L1 and L2"(line 1 and line 2). An AC motor has two sets of windings in the stator (start windings and run windings).

The control box controls the windings. The capacitors in the control box helps start the pump with a kick of extra power (this is needed to help overcome any resistance in starting the motor turning). After about a second of time the solid-state switch (1-12hp to 15hp use a relay) in the control box switches the motor windings from start to run.

A two-wire motor has no external control box like the three wire units; all of the components of the control box are inside the motor. The total price is about the same for both types and there is no advantage in performance other than aesthetics.

Two wire motors range from 1/3 hp to 1-1/2 hp. 3 wire motors range from 1/3 hp to 15 hp single phase respectively.

115V motors are limited in horsepower, however, in some circumstances where 230V is not available, it offers an option.

If you have additonal questions, or require information on three phase motors, please e-mail or give us a call.

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		Doodlebug Pump -- FAQ Welcome to the FAQ page. This is where you will find the answers to frequently asked questions. We are constantly adding to this section, it covers submersible pumps, jet pumps, jet pump trouble shooting, pressure tanks, pressure tank sizing,level control, Reverse Osmosis Filter Systems, Questions About UV Sterilizers & Water Softeners If you have a question - please include your e-mail address. We will not answer unknown requests. here Submersible Pump Electrical Power How Is Power Supplied To A Submersible Pump? How is electricity supplied to a submersible pump? Submersible Pump Electrical Power How is electricity supplied to a submersible pump? Like all electrical appliances pumps require a certain amount of current at a certain amount of voltage. Submersible motors can be supplied in 115 Volt and 230 Volt configurations. The motors are also configured to use either 2-wire or 3-wires to supply this power. Three wire motors use what's called 3- wire with "ground". Two wire units use 2-wires with ground or they can also use 3 wires with ground by eliminating one wire. To ensure the proper amount of power reaches the pump unit you have to use the proper size submersible electric cable. Depending on horsepower requirements and the depth of the pump, this is typically #12 or larger wire. Once the pump is selected a wire chart can be consulted to determine the correct gauge Submersible pump motors typically use 230V AC current, Single phase. This means that you have two wires from your circuit breaker or fuse box. If you measure the voltage on both wires with a voltmeter you get 230 volts. If you only measure 115 volts, then you would be limited to a 115 volt pump. Keep in mind voltages vary from location to location. Your 230 volt source could measure up to 240 volt and likewise the 115 volt source could measure up to 125 volts. If you have the option, it is always better to run your pump at a higher voltage. This allows you to use a smaller electrical cable and the motors generally run more efficiently. In a three wire unit, the two wires are routed into the control box and they are known as "L1 and L2"(line 1 and line 2). An AC motor has two sets of windings in the stator (start windings and run windings). The control box controls the windings. The capacitors in the control box helps start the pump with a kick of extra power (this is needed to help overcome any resistance in starting the motor turning). After about a second of time the solid-state switch (1-12hp to 15hp use a relay) in the control box switches the motor windings from start to run. A two-wire motor has no external control box like the three wire units; all of the components of the control box are inside the motor. The total price is about the same for both types and there is no advantage in performance other than aesthetics. Two wire motors range from 1/3 hp to 1-1/2 hp. 3 wire motors range from 1/3 hp to 15 hp single phase respectively. 115V motors are limited in horsepower, however, in some circumstances where 230V is not available, it offers an option. If you have additonal questions, or require information on three phase motors, please e-mail or give us a call. Return to top

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