How To Connect Three Wires AC Motor With A Capacitor Attached?

[@plumbbomb77]

Sorry, but i don't understand this, if 3 wires, one is Red or Brown for Live, one is Black or Blue for Negative or Neutral and the other which is for Earth ( Ground or yellow-green ),,. I have a dust extractor that is in need of repair, I have the capacitor but not the know-how, hope you can help in simple terms by showing all the wires not in close-up,,. I work in a monkey see, monkey do fashion,,. Thank you, Regards Alf

[@diymade2175]

Okay, Let me explain again. There are two winding coils for the stater inside single phase AC motor, coil 1 and coil 2 are connected in series, so the motor has three wires which they are Red (as it is showed in the video): - from the one end of coil 1. Blue - from the jointed ends of the coil 1 and coil 2. White - from the other end of coil 2. A capacitor MUST be connected between Red and White (Red is connected to the one terminal from the capacitor and White is connected to the other terminal from the capacitor)! Red is for Live which is connected to Brown wire from power cord in the video. Blue is for Neutral which is connected to Black wire from power cord in the video. White is for Live, but but but - this is an option Live wire for a different rotation of the AC motor. As in the video, White connected to Live: the AC motor rotated anti clock wise. NOTE: If Red is connected to Live, then White MUST NOT be connected to Neutral ! ! ! ! ! ! Vice versa. In the circumstance no motor's diagram can be found, you can follow the steps in the video to find or decide which will be Red for Live, Blue for Neutral etc. In your case, the motor's wires might have been different in colour(s) and numbers of wires might have been more than three but wires for the principle of motor operating are only three, the other wires might have been for the motor's low speed, high speed or Earth etc. Thanks for the interested and question(s) and good luck with your experience ! 👍

[@koortsj]

I understand that the colours of the motor and capacitor wires may be different to those in the video, but you do not explain which wire is for ground? Presumably the ground wire is somewhere attached to the casing of the motor?

[@oldgamer1330]

@@koortsj Yes, and not all motors or countries even have grounds.

[@torbenchristensen7145]

I have 3 black wires and 2 red. The 2 red are speddo

[@Offgridgremlin]

I was having a hard time reading all the diagrams online without an explanation. This was so clear, simple, precise and I got it working the first go! Thankyou

[@diymade2175]

Glad it helped & Thanks! 👍

[@oldgamer1330]

Hi, this is the only video I have found that actually shows you how to measure the windings resistance on a 3 wire motor and which ones the capacitor connects to. Thank you very much.

[@diymade2175]

Glad it helped & Cheers! 👍👍

[@fakifumi]

Thank you! I finished the one phase motor course two month ago and already forgot so this was a perfect brush up. Actually, we worked more on 4 wire connection and the 3 wire was more theorical lecture.

[@diymade2175]

Good on you, Mate! Glad it helped and also there is another video on my channel regarding multi wire connection (including 4 wire connection): "How To Connect Multi Wires AC Motor With A Capacitor Attached". On that video, the one of comments which I answered was related to 4 wire connection. Cheers! 👍

[@leo959]

This video is probably the most helpful I’ve seen in months. Thank you. God bless u

[@diymade2175]

You're so welcome! 🙂

[@sayhello2pedro]

I finally managed to connect my fan motor thanks to your perfect and detailed explanation. Thank you so much ❤

[@diymade2175]

Good on you & glad! 👍

[@gregorydobson4307]

Great explanation, i had a 24v ac single phase motor with 3 wires which powered an antenna rotator. The control box had 3 connections with a a capacitor across two of the connections. This helped me identify which motor wires i should use. Thankyou.

[@diymade2175]

Glad it helped & Cheers! 🙂👍

[@timh.2137]

Thank you very much! This was the best video on how to wire this kind of motor! I first wired it according to Jeremy Flemming's video but it kept getting very hot and I knew that wasn't right!

[@diymade2175]

Glad it helped & Cheers! 🙂👍

[@andrewglaum1087]

A big thank you from me too. I used my multi-meter and found Neutral. Motor runs perfectly in both directions.

[@diymade2175]

Great 👍glad it helped. Thanks!

[@Howard_Spence]

Great video. Thanks. Clearly and simply explained.

[@diymade2175]

Cheers! 👍

[@florotorralba1586]

Now I can connect my three wire motor to run ,thank you very big sir for sharing you expertise.

[@diymade2175]

Great 👍 & good luck with your experience! Thanks!

[@R.Akerman-oz1tf]

@@diymade2175 This was My best guess; however, so nice to have a concrete explanation.

[@diymade2175]

@@R.Akerman-oz1tf 👍

[@sacrajahrajah]

Very well explained and demonstrated. Thank you

[@diymade2175]

Thanks! 👍

[@amberswift3086]

I have a little three wire motor that came from a little AC powered neck massager. It looks like it has a 4 micro Farad non polarized capacitor, which I may have inadentantly blown. I'm happy that I found this video! Thank you!

[@diymade2175]

Very cool and I'm glad you're interested. Thanks!

[@oktemvardar6497]

thank you for the clear instructions; they were very helpful to me to run the old old GE dryer motor.

[@diymade2175]

Glad it helped.

[@henryrossouw930]

Just what I was looking for.Great explanation.

[@diymade2175]

Thanks & glad to hear! 👍👍

[@USMC1984]

Awesome!!! I have a couple of 3 wire motors, this helped me greatly on getting them running!

[@diymade2175]

Glad to hear and good luck with your experience! 👍

[@sham1234567891]

Thanks a lot. I followed your instructions and it was head on successful. Warmest regards.

[@diymade2175]

You are champion & glad it helped! 👍👍

[@WajidAliyev]

​@@diymade2175 What happens if Red and White wires are connected inadvertently to L and N of power supply.

[@WajidAliyev]

Very precisely elaborated ❤ what happens if Red and White wires are connected inadvertently to L and N of power supply.

[@diymade2175]

No, no !! In that case, a capacitor will be certainly burnt out and so does the AC motor: may be, may be some damaged, depending on that motor condition. Thanks for your interested!

[@josealexlozanoavila2677]

No entiendo el inglés, pero si entendí la clase, perfecto es usted un buen maestro...

[@diymade2175]

🚦😶

[@garymucher4082]

Great video. If you don't know the value of the capacitor because you only have the motor, what would you select for it's value and voltage rating? Thumbs Up!

[@diymade2175]

Great point and complex issues to understand whole thing but Rule Of Thumb: (1) A capacitor's voltage rating should be 1.5 times higher than single phase AC motor's, (2) The value of capacitor would be 70 µF per 1000W of AC motor. As example: To choose a capacitor for 200 Watt / 230 Volt AC motor (1) A capacitor's voltage rating = 1.5 x 230 Volt = 345 volt or higher. The value of the capacitor = (200 Watt / 1000 Watt) x 70 µF = 14 µF. Thanks.

[@stanleymphahlane5151]

Thanks for simple explanations

[@diymade2175]

U R welcome ! 👍

[@mariyamaman8689]

Thank you so much for the explanation

[@diymade2175]

Thanks & welcome 😊

[@davidjenkins2464]

Can you answer this and make it simple. I have a air compressor with a 4.5hp motor. The run capacitor is bad so I ordered a new one. But the new one has 4 prongs and 2 prongs. While my old capacitor has 2 prongs and 2 prongs. The wiring on the old one had yellow T7 yellow wire on I pole while the T8 yellow wire and plain yellow were across from each other. Does the T8 and plain yellow go on the 4 prong or the 2 prong. And does the T7 go on 1 of the 4 prong . This is on a Campbell/ Hausfeld 4.5 hp 20 gal . If you can help it will be appreciated very much.

[@diymade2175]

Well, although I'm not a technician special in your case, it can be explained in the theory. Your motor is 4.5 hp which a capacitor would be 250 µF (start capacitor) or so attached. If you bought a capacitor with that value (more or less) I mentioned, it wouldn't be the difference should you "the T8 and plain yellow go on the 4 prong or the T7 go on 1 of the 4 prong". In other words, "the T8 and plain yellow go on the 4 prong " is okay, "the T7 go on 1 of the 4 prong" is okay as well because a capacitor attached AC motor is not polarized. The reason a new capacitor has 2 prongs and 4 prongs which I reckon for latest function (s), that may not applicable to you. Thanks for the interested, question and enjoy your experience!

[@davidjenkins2464]

@@diymade2175 Well thanks for the information. So doesn't matter as long as the wires are as they were on the old one . Right ?

[@diymade2175]

👍 Yes.

[@مجوهراتميزيا]

thank for the information, You helped me a lot💪💪

[@diymade2175]

Glad to hear that! 👍👍

[@tarunray1955]

Thanks a lot for sharing your knowledge. Regards

[@diymade2175]

Welcome & thank you! 👍

[@caloymixofficialvlog8774]

Thank you for sharing

[@diymade2175]

👍

[@Flordelino-hf1nu]

I wonder how to wire my 2 sets of 220v contactors to run my 5HP single phase induction motor, with dual capacitors in a forward-reverse operation. How to draw its corresponding diagram? Good day out there.

[@diymade2175]

Thanks for your interested! There is no video regarding your concerns on my channel however there are some shows related to you on the different channels, the one of the videos which may be helpful for you (I refer to you now): "Single Phase Motor Connection With Two Capacitors" on youtube channel @LearningEngineering, please watch that short video. Incidentally for reverse operation, just exchanging Red (R) wire and Blue (S) wire in the video's diagram to your 2 sets of 220v contactors. Good luck with your experience!

[@Flordelino-hf1nu]

@@diymade2175 Thank u for your time replying by. Keepsake.

[@education9135]

What about the windings were u get a reading of all windings equal in ohms which is on a universal motor can u elaborate on that

[@diymade2175]

Thanks for your interested! If all windings were equal in ohms, I'd say the winding (s) in that motor were at faulty such as some part of winding (s) burnt or short completely. The motor needs to be disassembled and further checked.

[@sham1234567891]

Great Stuff! Is it the same principle for wiring a water pump with three leads? A quick reply would be much appreciated. Thanks and warmest regards. (Sham).

[@diymade2175]

Thanks for your question - yes, it is the same principle as long as your water pump motor is an AC single phase and make sure to check the one of three wires from motor: Earth Wire or not. Good luck! 👍

[@torbenchristensen7145]

I have just messeurd my welling induktionsmotor 3phase. I have the same resistent on all 3 wires. 03.7 ohms. Whitsh wire should can i use for the capacitor?

[@diymade2175]

Thanks for the interested! Mate, your intention are: A 3 phase AC motor to run by single phase AC power then how to connect a capacitor to that motor, am I right? make sure the motor has been connected by Delta (∆) in the motor's terminals box. Then, a capacitor can be connected to any two terminals in the motor's terminals box. Finally, to connect Live(L) wire from AC power to the one of the capacitor's terminals, Neutral(N) wire from AC power to the terminal in the motor's terminal box which has not been connected by the any one of two wires from the capacitor. That's it & good luck! P.S. - It wouldn't be any good for a 3 phase motor with the larger capacity (a motor > 1 kw)to run on singe phase AC power.

[@education9135]

Secondly when testing a motor like this if u must get a stable resistance, if u get a fluctuating resistance or OL that means that the windings are finished am i correct

[@diymade2175]

That'd indicated the motor had the kind of faulty and you were right at this stage but it might have indicated other cause (s), certainly it needs to do further investigate if you'd want to be sure. 👍

[@yurikontrobarsky8684]

Great video. Thanks

[@diymade2175]

Cheers! 👍👍

[@panayotbelchev1043]

Will there be a problem if blue wire is connected to L and white/red to N?

[@diymade2175]

No, it wouldn't. I don't see any problem regarding your concern and it shouldn't. Thanks for your interested! P S - Never ever Red Wire is connected to L & White Wire to N or vice versa !!!!!!!!

[@MauricevanBavel]

I have a Papst motor with 4 wires. Braun, green, yellow and blue. How to connect this wires? Thanks.

[@diymade2175]

Thank you for the interested! According to your information supplied, there are three possibilities: (1) If the one of four wires is connected to the motor's body which their DC resistance between the wire and body will be zero, then the wire is earth wire; In this case the rest are three wires only, following steps in the video. (2) If no wire has been connected to the motor's body but it has zero resistance between any two of four wires which means those of two wires are the same wire, and treat the motor's four wires as three wires only then following steps in the video. (3) If it is not above and all has some resistance value between any of two wires, in this case I reckon the motor has two speed. It is complicated to explain here, I will upload a video regarding "how to wire multi speed motor" in near future. Thanks again. 👍👌

[@MauricevanBavel]

Thanks for the information. I think I should connect 2 of the 4 wires and follow the instructions of your video. I measure two separate windings. Thank you very much.@@diymade2175

[@diymade2175]

@@MauricevanBavel Glad to hear. Good luck with your experience! 👍

[@Nunohobbies]

Excelente explanation!

[@diymade2175]

Thank you and glad you liked it!

[@karlohorcicka7388]

My resistances are 55 and 11 ohms... Total 66, but I doubt I should connect power lines to 11ohm coil. Should I just connect to 55ohm and call it a day?

[@diymade2175]

You are properly right however in the most cases, although the resistance of two coils wouldn't be exactly same value, it should be a small difference. In your case I'd suspect 11 ohms coil damaged such as its winding had some short circuit. The motor might be still okay to run but it wouldn't be okay soon. Thanks for your interested!

[@htinlinaung433]

Thank you.

[@diymade2175]

Glad you liked it. Cheers! 👍

[@knguyen3348]

Clear but what end go to positive and which to negative you only show motor and capacitor you should show were the power goes to which ends of wire as well.thanks

[@diymade2175]

Thank you for the interested, Mate! The contents in the video have been included what you've asked and also can be read from subtitle/cc. I'd suggest you to watch the video fully and enjoy to play with your device. Thanks again!

[@ВалериевичАлександр]

Автору от души.

[@PaulBonifaceMagodo]

Benefiting video.

[@diymade2175]

👍

[@randallmarsh446]

does this work on 120 volt ac as well?

[@diymade2175]

Certainly yes: It works on 120 V and 230 V of single phase AC motors from the principle of operation point of view. 🙂 Thanks for your interested! 👍

[@SolarwindWater]

Why is the capacitor has to be connected to the highest resistance wires (red and white) here.? I'm not good at electricity knowledge, but very interested in learning about it. Any comments will be appreciated.

[@diymade2175]

For answering your question thoroughly it'd need a few hundred of the words, however typing it as simple as possible and hope this can explain regarding your concern. A single phase AC motor with a capacitor attached, which its stater has two coils in series built. As showed in the video, the way of a capacitor connected can provide: (1) An easy & smooth to start the motor. (2) When the motor running, improving the power factor as you might have known - the coils inside motor as an inductor in AC circuit has voltage phase 90 degree advanced its current however a capacitor in AC circuit has voltage phase 90 degree behind its current, so they compensate some part of phase angles each other but not all in practical circuit. In order to get (1) & (2), a capacitor must be connected to the highest resistance wires. On the other hand, if a capacitor is not so connected as the video showed: It'll either burn a capacitor or not get above (1) & (2). Thanks. 👍

[@SolarwindWater]

@@diymade2175 Thanks for explaining.

[@DhamakaYT00]

Rats have cut the wires of my vacuum cleaner's motor. How do I connect it now? Can you help me?

[@diymade2175]

Although I'm not a vacuum cleaner's technician, your circumstances might have been different and following points are general guides only: In the most cases, rats would not get into the motor so locating where was the wire(s) or other damaged by dissembling the vacuum case carefully - I suppose you have the basic tools such as: Screw drivers & a pliers. For repairing wire(s), make sure to have a good insulation. Incidentally speaking, the motor has two type: AC motor or DC motor - there is a small printed circuit board inside cleaner's case for DC motor, it might need to check the circuit board & associated wires as well. Good luck! 😶👍

[@ijustwanttogosailing8248]

Thank you!

[@diymade2175]

👌👌👌❤❤❤

[@rbnjr]

Will the motor run without the capacitor attached.

[@diymade2175]

Answer(s) are Yes and NO depending on how was an AC motor built, however in most cases I'd say No. An AC motor in the video showed, answer is NO. Thanks for your interested!

[@עדיאלראופר]

Professional

[@diymade2175]

Cheers! 👍👍

[@shujauddinshakoor2469]

Thanks

[@diymade2175]

You're welcome!

[@htunmyintaung1876]

good info

[@diymade2175]

Thanks Bro. 👍

[@rilwankhan6874]

Thanks 👍

[@diymade2175]

Welcome 👍

[@johnfowles4177]

could you control the speed of this motot if so how

[@diymade2175]

Thank you for the interested! The motor itself in the video showed has only one speed however you can change its turning direction by arranging a different way to be connected from the power. In order to control the speed of the motor in the video showed, you have to add an AC Motor Speed Regulator between the power and the motor, that was not showed in the video. Thanks again!

[@DIRTTRIKER]

All three wires o have read same resistance

[@diymade2175]

No, no Bro. The motor would be at faulty such as burnt internal winding or short if it had 0 or read same resistance. Good luck on next one! 😐

[@DIRTTRIKER]

Missspelling , blue black and red wire 1 horsepower fan motor all three wires no matter how I test them they have the same resistance

[@diymade2175]

@@DIRTTRIKER Certainly something wrong with the motor's internal winding. needs dismantling motor for further investigation if you know how to, otherwise putting the motor in a recycle bin. Bad luck Bro! 🥺

[@DIRTTRIKER]

@diymade2175 okay so tell me what your knowledge is on these new Motors

[@DIRTTRIKER]

I'm talking about the ECM motor it's the same thing you would see in ventilation heating air conditioning,

[@1977np]

Great video. Junk meter. Please get a better cheaper one.

[@diymade2175]

💗🤣

[@mayankchovatiya4005]

Thank you so much 🙏

[@diymade2175]

👍

[@Ulr149tw21]

Thank you soo much god bless

[@diymade2175]

👍🙂 Cheers!

[@abuyahya1043]

Sir I have front loud washing machine motor there is a 3 wires same resistance how can I connect capacitor and which value of capacitor is suite able please answer thanks

[@diymade2175]

Thank you for the interested however if your motor from Front Load Washing Machine is in good work order, their DC resistance between any two wires shouldn't be the same value so I'd say your motor internal wires or coil(s) might have some faulty such as short or broken, the motor may be, may be able to run but it wouldn't go well or break down completely soon. Regarding how to choose a capacitor, please read comment section which I answered to @garymucher4082. Thanks! 👍