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

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 ! 👍

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?

Glad it helped & Thanks! 👍

You're so welcome! 🙂

Great 👍glad it helped. Thanks!

Good on you & glad! 👍

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

Glad it helped.

Thanks! 👍

Thanks & glad to hear! 👍👍

Glad to hear and good luck with your experience! 👍

Great 👍 & good luck with your experience! Thanks!

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

@@R.Akerman-oz1tf 👍

U R welcome ! 👍

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Glad to hear that! 👍👍

You are champion & glad it helped! 👍👍

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

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Thanks & welcome 😊

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Welcome!

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!

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Welcome 👍

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.

Thanks Bro. 👍

You're welcome!

Cheers! 👍👍

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! 👍

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!

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

👍 Yes.

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 !!!!!!!!

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!

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!

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

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! 😶👍

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! 👍

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. 👍👌

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

@@user-zx5ig1cp8t Glad to hear. Good luck with your experience! 👍

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!

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!

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. 👍

@@diymade2175 Thanks for explaining.

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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! 👍