How To Wire A Pool Pump

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Pool pumps are wired to run on either 230V or 115V. Most are run on 230V and are preset at the manufacturers at 230V. If you are going to wire your own pool pump, you must first know what voltage is coming to your pump from the house circuit breaker. Also you must ensure that the electrical supply agrees with the motor's voltage, phase, and cycle and that all electrical wiring conforms to local codes and NEC regulations. If you are unsure of this voltage or are unfamiliar with electrical codes and regulations, have a professional electrician wire your pump for you or at least check your work.
Failure to wire the pump correctly can cause electrical shock or can damage your pump motor and void your warranty.

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Things You'll Need

Video

Step by Step

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Step 1

Measure the voltage on the wires going to your pool pump. See "How To Use a Multimeter to Test a Pool Pump Motor - Voltage". This voltage will be either 230-240V or 115-120V. Pool Pump manufacturers commonly list these as 230V or 115V. Generally you will have three wires coming to your pump. For 230V you will generally have a red, a black and a green wire. The red and black wires are both hot. There is no neutral. The green wire is always ground. For 115V the three wires are generally black (hot), white (neutral) and green (ground).

Step 2

CAUTION: Before you start wiring your pool pump, turn off all power to the pump at the breaker box.

Step 3

Unscrew the two screws that hold the cover over the back end of the motor. Remove the cover to expose the electrical connectors.

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Step 4

Screw a metal elbow onto your pool pump at the end of the motor.

Step 5

Run conduit from the metal box to the pump. String your three wires thru the conduit and metal elbow into the end of the motor. Screw the conduit collar onto the end of the elbow. Ensure that your wire size is adequate for the HP rating and distance from the power source. Check your pool pump owners manual for the correct size. Wire sizes generally run 14 AWG for motors up to 1 HP and from 14 AWG to 10AWG for larger motors depending on HP and Voltage.

Step 6

If you are wiring for 230V, the three wires coming to the pool pump from the circuit box are red, black and green. In this example for Hayward pool pumps, red will go to the L1 terminal and black will go to the L2 terminal. The green wire will be under the green screw to the far right. In addition there is a black plug with two wires coming from inside the motor , a black wire and white wire with a black tracer line. The black plug is positioned so that the white arrow on top of the 2 prong black plug is pointing at 230V.

Step 7

For clarification this picture shows the terminals without the wires. The red wire is attached to terminal 1 of Line 1 (L1). The black wire is attached to terminal 3 of Line 2 (L2). The green wire is attached to Ground (GND). The black plug is positioned so that the black wire is attached to terminal 5. For 230V the white wire is not attached.

Step 8

If you are wiring for 115V, the three wires to the pool pump will be black, white and green. Attach the black (115 V) wire to terminal 1 of Line 1 (L1). Attach the white wire (0 V) to terminal 3 of Line 2 (L2). Attach the green wire under the Ground screw (GND). The black plug is shifted in position so the black wire is attached to terminal 4 Line 2 (L2) and the white wire is attached to terminal 5. Note: in this position the white arrow on top of the 2 prong black plug is pointing at the 115V label.

Step 9

Replace the pool pump motor cover and secure it with the two screws.

Step 10

Lastly your pool pump motor must be bonded in accordance with local electrical code requirements. Use a solid copper conductor, size 8 AWG or larger. Run this wire from from a reinforcing rod to the pressure wire connector provided on the motor housing. Note: In this example the wire coming from the bottom of the picture is going to the pump. The upper wire is going to the heater to bond the heater.

Comments

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(1 to 40 of 474)

 Posted: 9/29/2021 

I'm wiring a B2853 pump and have a gray wire and a white wire. I haven't turned in on yet, but I wired it for 115. The one I'm replacing had the prong set on 230 tho. And it's on a double breaker switch. The more I think about it, I think the white wire is live. Not really a question, I'm just confused.
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InyoPools Product Specialist  Posted: 9/30/2021 

It sounds like you have 230 and not 115. Unfortunately, not every electrician or DIY-er will follow electrical wire color code guidelines. If you want to be super sure, I'd test the circuit with a multimeter (How To Use a Multimeter to Test a Pool Pump Motor - Voltage.) Hopefully, you have not turned on the motor. A motor set to run on 115V can be damaged if 230V is applied. But if you apply 115V to a motor set to run on 230V, there shouldn't be any ill effects besides it not running.
 Reply

 Posted: 5/22/2021 

In step 8 I am having trouble shifting the black tab down. I have tried to dislodge it by pulling toward me and it’s not working . Can you please help?
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InyoPools Product Specialist  Posted: 6/4/2021 

What is the part, model, or catalog number on your motor's label? A picture of the motor label would be most helpful.
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Anonymous  Posted: 5/16/2021 

I have an old motor that has 1 white wire and 1 blue wire and a ground. Is there any way of knowing if this is 230 or 115? All the labels on the motor are worn off and I need a replacement.
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InyoPools Product Specialist  Posted: 5/21/2021 

 Get a multimeter and test the voltage of the individual lines. The only way to know for sure is to test it.
 Reply

 Posted: 5/10/2021 

Hello, I am trying to wire a Hayward Super Pump 1-1/2 hp W3SP2610X15. I have a 8/3 wire run to the pool. Does the ground wire need to be insulated.
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InyoPools Product Specialist  Posted: 5/13/2021 

I suggest an insulated ground wire. Bonding wires do not need to be insulated.
 Reply

Anonymous  Posted: 5/7/2021 

I have a hayward 1 1/2 hr pool pump. Model C48L2N134B1. There is a black wire hanging out of the motor housing with a clip on it. don't seem to see where it hooks up to. Any Help?
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InyoPools Product Specialist  Posted: 5/13/2021 

Does the motor have an intact label? If so, there should be wiring instructions on it. Sometimes the MFG list extended wiring instructions that show internal wires in the schematic.
 Reply

 Posted: 5/5/2021 

At Step 8, the following is confusing, as usually, the black is delivering 115v and the white is neutral (0v). Looks like white and black are swapped? "Attach the white (115 V) wire to terminal 1 of Line 1 (L1). Attach the black wire (0 V) to terminal 3 of Line 2 (L2)."
 Reply

InyoPools Product Specialist  Posted: 5/13/2021 

Good catch, I've edited that step. Thank you very much.
 Reply

Anonymous  Posted: 5/15/2021 

Sorry still confused on L1 L2 wiring. Is the black L1?
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InyoPools Product Specialist  Posted: 5/21/2021 

Black = L1, White = L2
 Reply

 Posted: 4/7/2021 

My pool pump is wired.how do i wire a timer to it and do it need a separate breaker
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InyoPools Product Specialist  Posted: 4/8/2021 

First, we would need more information. What is the model, part, or catalog number on your motor label? Second, what type of timer are you looking to put on the circuit? A basic on and off type of timer, or something more complex like an automation system?
 Reply

 Posted: 4/1/2021 

What is the name of the elbow? mine was plastic and in removing my old one it broke. Is it supposed to be metal? the screw size is .70, not 3/4. Is there a specific size for pool pumps?
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InyoPools Product Specialist  Posted: 4/1/2021 

You should be able to find one at a hardware store by asking for an electrical conduit elbow. You could also Google a picture of it, then bring it into a hardware store so they can get what you need. The standard size is 3/4" for pool pump motors.
 Reply

 Posted: 8/12/2020 

If I have a pump that can be wired either 115 or 230 and my power supply is only 115 but the pump is currently wired for 230 will it cause the pump to underperform?
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InyoPools Product Specialist  Posted: 8/26/2020 

The motor may not turn at all. If you know the voltage of your power source, and that the motor is currently set to a different voltage, I would just switch it to the right setting.
 Reply

 Posted: 8/12/2020 

My old motor didn’t have a ground wire attached. Do I still need to attach a ground wire to the new motor and if so where do I attach the other end of the ground to?
 Reply

InyoPools Product Specialist  Posted: 8/20/2020 

The ground wire should go back to the timer or the breaker.
 Reply

 Posted: 8/11/2020 

My old motor didn’t have a ground wire attached. Do I still need to attach a ground wire to the new motor and if so where do I attach the other end of the ground to?
 Reply

InyoPools Product Specialist  Posted: 9/3/2020 

Your motor needs a ground wire. The ground wire is connected to the metal housing of the breaker box. I'd make sure to higher an eletrician to get you set up.
 Reply

 Posted: 8/1/2020 

I wire motor for 115v and it does not run but if switch the plug to 230v it runs
 Reply

InyoPools Product Specialist  Posted: 8/21/2020 

Are you sure the circuit you are using is 230 volts? Have you double/triple checked the wiring on the motor to verify it is indeed set to the correct voltage?
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 Posted: 7/22/2020 

I installed a new Hayward Super Pump which came with two different power leads for 110 vac and 230 vac. When I went to hard wire the pump, of course I misplaced the 230 vac lead. Any ideas as to the Hayward part number. Thanks
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InyoPools Product Specialist  Posted: 9/3/2020 

I'm sorry, but I am not sure what you are referring to when you say it came with two leads. Inground pump motors that are dual voltage (accepts 115 or 230 V) usually just have a jumper or a knob on the terminal board to switch it to the desired voltage. The pumps that I have seen fresh of the box do not include conduit or wiring.
 Reply

 Posted: 7/6/2020 

Very helpful, thanks!
 Reply

InyoPools Product Specialist  Posted: 8/26/2020 

You're welcome! Thank you for reading.
 Reply

 Posted: 6/17/2020 

Appreciate you making this page. step 7 made it clear. L1 and L2 and terminals...seeing those numbers made something simple very clear with a picture
 Reply

InyoPools Product Specialist  Posted: 9/2/2020 

Glad to help. Thank you for reading!
 Reply

 Posted: 5/23/2020 

i have a new 2HP INGROUND POOL PUMP 5850GPH DUAL VOLTAAGE MOTOR WITH DAMAGE THE WIRING DOES NOT LOOK LIKE YOUR PICTURES , I HAVE 30 amp Service ,
 Reply

InyoPools Product Specialist  Posted: 10/23/2020 

What is the part, model, or catalog number on your motor's label? A picture of the motor label would be most helpful.
 Reply

 Posted: 3/25/2020 

Similar question about wiring hayward pump for 230. Exisiting setup has 2 blue wires and green for ground. Is it correct that either blue wire can be connected to either terminal. Tks
 Reply

InyoPools Product Specialist  Posted: 3/31/2020 

If you are wiring for 230, and have two hot lines, and one green; no matter the color of the wire, one hot line goes to one terminal and repeat for the other terminal
 Reply

 Posted: 1/11/2020 

I have two black wires one from "load out" and the other is to" line in"which one gore to L1?
 Reply

InyoPools Product Specialist  Posted: 1/13/2020 

Are you wiring for 120 or 240?
 Reply

 Posted: 1/15/2020 

I have the same situation - Two black wires and a ground wire. Hooking up a 230 variable speed motor - ECM16SQU.
 Reply

InyoPools Product Specialist  Posted: 1/17/2020 

Because it is 230 volts, both lines are carrying 115 volts; so it does not matter which line goes to which terminal. One black wire goes to L1; the other black wire goes to L2. There is no wrong answer.The green ground wire goes to the green screw adjacent to the L1 and L2.
 Reply