How To Wire A Pool Pump

Written by:  Danny Rhodehamel
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 (3.49 OUT OF 5 STARS ON 38 RATINGS)

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.

Tips & Warnings

Video

Things You'll Need

Step by Step

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
how to wire a pool pump

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

Step 4
pool pump wiring

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
hayward pool pump wiring

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
how to wire a pool pump

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 white wire to terminal 1 of Line 1 (L1). Attach the black wire 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 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
how to wire a pool pump

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 (121 to 160 of 280)

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User: JP

Have a new hayward super pump that I want to set up on 115V. Does the black wire go on L1 or L2?

User: Inyopools

wiring - It sounds like you have four wires coming from your power supply box -black, blue, white and green. Check the voltage across a pair of wires for 230V. I would guess it's the black and blue wires. If you have 240V across black /blue, connect those wires to L1 and L2. White is extra but I would cap it off with an electrical wing nut. Green goes to the ground screw. Make sure your motor is configured for 240V.

User: beezdotcom

Thanks to user jgianoli for mentioning his problem with the spade terminals being at an angle and preventing him from easily switching from 230v to 115v...I had the same problem! Now, thankfully, I have the same solution, too.

User: 

myold trasstar had four wires black blue white and green the new super pump has only three l1 red l2 black green wire to screw. where does the white wire connect . is this the correct wiring settings

User: Inyopools

cpe.ru90 - According to the motor rep, because this is AC power, it does not matter if the black is on L2 or L1. Black and White wires can be swapped.

User: cpe.ru90

hi, I am in the process of replacing a 115v configured super pump ust1152. while disconnecting the electrical I made note that the black was connected to L1 and the white to L2, which is opposite of what your how-to states. would the pump still work if it was wired this (incorrect) way or did I record the connections incorrectly? thanks, chris

User: Inyopools

T.I. - Unfortunately I have no information on this relay. I would suggest submitting your question to Omron directly using this contact form.

User: T.I.

I have a 2HP pool motor to be installed. How would you connect the wires back to Omron G7-2A-BUBJ-CB DC24 relay? Thanks.

User: Inyopools

fergi - Check your supply power to the motor. If it is 115V and your motor is configured for 230V, you need to change your motor's configuration to 115V. See the top of your motor label for instructions. Check your circuit breaker. For this size motor, you need a 30 amp breaker for 115V supply power or a 15 amp breaker for 230V. Also, you may have a bad breaker that needs to be replaced. Check the size of the wire to your motor. For lengths under 50 ft and this size motor, you need No.10 wire for 115V or No.14 wire for 230V. If your wire length is greater than 50 ft, you will need wire one size heavier.

User: fergi

we have installed the new 1 1/2hp hayward superpump for ingroung pool, but it keeps tripping the breaker.

User: Inyopools

rgholloman - The instructions to change the motor's configuration from 230V to 115V are often included at the top of the motor's label. The newer AO Smith motors now have a knob on the power terminal which changes the voltage easily by rotating it CCW.

User: rgholloman

the new Motor cuts off after 3-5 minutes which I understand from reading the comments that it has something to do with voltage.
I have 120 volts into the pump motor. there are three wires: red, black, green. I wired it like the one I took off. red to L-1, black to L-3 and green to ground.
Inyo says that pool motors are configured to 230 volts from the manufacturer and therefore, I need to reconfigure the motor to 115-120 volts to match the voltage to the motor.
Question: how do I reconfigure the motor from 230 to 120?

User: Inyopools

Jeremy - Sounds like you have 240V if each wire, when test separately, reads 120V. That's white to ground then black to ground. To be sure place one probe on black and one on white to check across black - white. That will probably read 240V.

User: Jeremy

Each wire has a current of 120....Both white and black. So how would I wire it.

User: Inyopools

Sid - 8G or larger solid copper wire is recommended for bonding.

User: Inyopools

Jeremy - Your supply voltage is either 240V or 120V. If the wires to your motor are your supply wires coming from the breaker box, check the voltage with a multimeter by placing the meter's probes on the white and black wires. The meter will read around 240V or 150V.

User: Sid

I have 1.5 HP pump connected @ 230 volt, 40 feet from its breaker. I have installed 3-10 G wires in 1&1/2 inch conduit which also carries 2 wires for pool lighting and 2 wires for a pool sweep pump (3/4 HP). One of these three wires is for grounding. The pumps are also grounded by a 10G copper wire to the ground slab. Should I have installed 8G grounding wire?

User: Jeremy

I bought a new Hayward super pump 1 hp. Ready to wire it and I tested my voltage and both lights lit up 240 and 120. The wires I have leading to the motor are black white and green. Just double checking on which way to wire it??? Any help would be great.

User: Inyopools

amy5674 - You are going to need a multimeter to measure the voltage on the wires. With the power on, put one meter lead on the red wire and the other on the yellow than the blue. If you measure around 220V on either pair (red/yellow or red/blue) use those two wires as your power source to L1 and L2. It does not matter which wire goes to which terminal. Be very careful not to touch these wires while you are measuring them. You are working with 240V. After you have selected the pair to use TURN THE POWER OFF, cap the extra wire with a wire connector, and hook up your motor.

User: amy5674

I just got a Hayward RS Replacement Series Pump since the old one finally died. I have 220v...my problem is I have 4 wires coming from the box...a red, a yellow, a blue, and a green. I get the green and the red but what do I do about the yellow and the blue? Red to L1...greed to ground...and then what? Thanks

User: Inyopools

Ciro – It sounds like your pool cleaner issue is low return pressure. Make sure your diverter valves are set up to open flow to the return lines in your pool – reduce flow to spa or fountains. Another suggestion – You may be building up back pressure in your return lines. One manufacturer rep suggests replacing your return nozzles with one size larger nozzles.

User: Ciro

Hi, I just purchase a Polaris 165 pressure side vacuum cleaner, How ever and connected it doesn't move and I noticed my return lines have low pressure I backed wash my filer and cleaned filter I am not sure if Im setting up the vacuum right or if its something else.

Thank You

User: Inyopools

Ciro - Yes, it is normal for a pump motor to run a little hot. Your pressure problem is after the pump. Try backwashing or cleaning your filter a couple more times to see if that helps reduce your pool's pressure level.

User: Ciro

Hi, I have a sta rite 3/4 pump 230V, my set up is 220V I have one green and two reds,is it normal that my pumps gets just a little hot? and when I first started the pump the filter gage was on 10 lbs pressure and more water pressure coming from the returning lines after 1 hr the pressure gage went up to 20 lbs and lower water pressure form returning lines.

User: Inyopools

wired for 220V - It does not matter which red wire is connected to L1 and L2. Both are hot.

User: 

I replaced my motor (wired for 220V) but I have two red wires and one green. Does it make any difference which red wire I connect to L1 and which one to L2?

User: Inyopools

Mark - You need to have three wires plus ground to connect your two speed pump to your PE153 Timer. I am currently writing a guide on How To Wire a PE153 Timer to a 2-Speed Motor which will be out in a couple of days.

User: mark

I just purchased a new 1.5 pump and a pe153 timer. I called in with my old equipment and your customer service matched up a replacement motor.

i only have 1 black, 1 white and my ground.

the pump will run on what seems like low but won't run on high. any suggestions

User: Inyopools

KateMonster - You will need someone with a voltmeter to test your voltage. Carefully connect the leads of the voltmeter to the two yellow wires. If you have 220V to the motor, it will read 220V.

User: KateMonster

I have 3 wires - 2 yellow and a green. Any idea on voltage? My pool pump is old and I'm not easily finding config details.

User: Inyopools

arb - Make sure your motor is configured for 220V. Then check the voltage on the wires. You should have 220V between the red and black wires from the supply power. Put red on L1 and Black on L2. Blue is extra but I would cap it off to be safe.

User: arb

I have 4 wires coming from the pool connection box.
1-red
1-black
1-blue or gray?
1-green
my motor (A.O.Smith UST1152)..I am aware the green is ground... where do the other wires connect to the motor? thanks in advance.

User: jgianoli

Thank you for clarifying that. My spade terminals are not sitting down as they are in pics 7&8. mine are at an angle as the top pic. so i just bent them down and connected the plug right in. Thanks again for your help.

User: InyoPools

Jgianoli - If I understand you correctly, when you convert to 120V, you will want to connect into that terminal that is "in the way". See steps 7 and 8. When you move the terminal plug over to the 115V mark, the plug will be connected to terminals 4 and 5.

User: Jgianoli

Hi, I have the 1hp hayward super pump and will be converting it to 120v.My question is when i move the plug to line the arrows up there is a spade connector that is at an angle that will be in the way, i can't bend it out of the way up as it hits the screw before getting out of the way, if i bend it down the connector will plug into this also. is this acceptable? On the first picture you can see the dual spade terminal i'mtalking about.
Thanks, John

User: InyoPools

Larry - Thanks for your comment. We do appreciate independent reviews to help keep us accurate. I did contact the experts at the motor manufacturer and they state that for 230V AC motors, either black or red wires (both hot) can be attached to either terminal lead L1 or L2.

User: Larry

Steps 6 & 7 of your instructions have the red wire connected to L1, and the black to L2. This is the reverse of convention, as I understand, and all the web sites I find that discuss L1 & L2 and their colors.

User: InyoPools

Shawn - Sounds like you may have 120V coming into your motor that is probably set up for 230V. Check your source voltage with a meter and see if it's 120V. If so, you will have to reconfigure your motor to 120V. New motors are set and shipped at 230V.

User: Shawn

My Hayward pump stopped working after 6 yers so I replaced it. The new one just hums like the original and gets hot. Red to L1, black to L2, green to ground. Any suggestions? Thanks

User: InyoPools

ghayden - Make sure your DE filter is clean. Besides backwashing you should pull all the grids and wash them individually. If that doesn't bring the pressure down, you might consider buying a larger filter.

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Tips & Warnings

Make sure that your pump is connected to a GFCI circuit.

Make sure all power to the pump is turned off at the circuit breaker before wiring the pump.

If your are unfamiliar with local electrical codes and regulations have a licensed electrician check your wiring.

Wires will very according to the manufacturer of your pool pump. Please contact the manufacturer if you are unsure of the configuration of your pool pump.


Please Note:

Inyo Pool Products is not responsible for any injury or damaged equipment
while using our guides. Using our guides is doing so at your own risk.
These guides are suggested use of your pool or spa equipment and may vary
depending on which product you are using.