How to Connect a Single Phase Motor

This video will show you how to connect a Single phase motor with two capacitors. A motor with a start and run capacitor and a start and run coil.

[@noctanal9269]

Understood. Your explanation is simple and straightforward. Like that

[@peterstiles1]

Best explanation about this I've seen. Love that you leave the circuit diagram on screen - really helpful. Thanks.

[@jollyscaria1922]

Vrey good welcome sorrey to thing me

[@shavtavatbahary1932]

@@jollyscaria1922 xacwdsss

[@johanminnie2213]

Just want to thank you for the very good explanation in identifying and correctly connecting the coils, capacitors with power... well done it was enough and all the information I needed to successfully connect mine... thanks.

[@Scoobyivan]

Finally a clear video!! Well done on explaining it in basic terms Wish I see this when I was at my unit

[@lmorgan877]

Thanks for taking the time to produce such a clear, instructive guide. I thought I was buggered when I lost the wiring diagram for my motor. Your generosity is appreciated.

[@roseelectronics4582]

Same here

[@dineshshinde9966]

Its very good video, which is useful to know how to identify motor winding & connections. Its helpful for all. Thanks

[@humphreykariuki6810]

That's great. I have been struggling to wire this after watching this video,i found it very simple.

[@MrMRoad]

Wow! I have been busy for quite some time to get my motor running. Watching a ton of videos and reading loads. Finally found this video with a clear measurement. To find out I wasn’t a complete idiot, but the previous owner wired it wrong. Which isn’t a problem for star configuration, but actually is for delta (kinda sound like a pro here, while I usually stay away from this kind of stuff). A big THANK YOU!!!

[@sakarna]

Thank you very much. Explaining very simply and clearly.

[@johannesleroux7210]

Oh my goodness. thank you so much. It's all clear to me now. Thank you for explaining it so clearly.

[@roydearne9114]

Good teaching

[@SolvieCapital]

you are very good at this. Thank you for taking time to make the videos.

[@oceanmoyo3966]

wow incredible explanation sir thank you so much

[@mariafreedom6069]

Thank you Sir. Very educating

[@durestemauricerichard9489]

Very clear explanation bro, thank you so much!

[@issafifi]

Best explanation. You have a follow up in me for sure

[@Brian18741]

Thank you, exactly what I was looking for! 👋👌

[@josephwachira62]

Nice content, clear and easy to understand

[@stephenkamondia2250]

Thank you for smart explanation .

[@scattkiwiman]

very helpful for a compressor motor I need to repair, thanks !

[@husseinkhamies8827]

thank you for this neat and clear practical connection and information

[@thee_detective]

thank you man. this is the video i was looking for

[@Trade920]

Great explanation thank you

[@TemboM]

Hi Mr Jean thanks for the good explanation, how do you make the same single phase motor run in forward/reverse?

[@p0we111]

Hi Masauso Just change around the start coil polarity. (just flip it around)

[@tiaanoertel3245]

Dankie Jean. Well done🙏 Delyx se dankie

[@p0we111]

😁 Bly ek kon Delyx help!

[@kipingky]

with this arrangement of the capasitors... can rotation direction be reversed only swab the terminal link?

[@mickaelherman7451]

Hello Mr Jean B thank you for your educating video once again, I've almost all of your youtube videos. I just want to ask you to do a video of wiring a Distribution Board (normal House) with geyser, stove, plugs, and lights. Once again thank you for the Knowledge.

[@p0we111]

Thanks Michael. Will try and do that,good idea!

[@mickaelherman7451]

@@p0we111 Thank You

[@aliabdulla1564]

thank you . for every motor do we have to use capacitor for run. I have 3.7 kw motor but I use start capacitor please

[@shivpatil6290]

Thanks for good information it's helpful for me

[@cabdirahmaansahrdiid6386]

thanks pro, clear explanation with diagram

[@heinthu8091]

Thank you very much for your explanation

[@danielteyehuago1633]

Thanks for your sharing it with us. This is a great tutorial and very informative... dl

[@RollingEasy]

I picked up an old 1/4hp split phase I believe it to be? It has only 3 terminals and 1 Earth and with the centrifugal switch but no capacitors?.... Can it be reversed as simply as we've spoken about already here? With just the start coil reversed? Or is it different altogether? L connects to both a Red and Black on a single terminal. N connects a Black with a Bridge across to a Red in the centre. I gave it a service and put it back together. It was running true for my needs so I did not check the Ohms to see which coil was which... But now I discover that I'll really need to have the pulley 180deg from my original plan so the motor will need reversing. Hope you can give me some more good advice.... I like certainty with all things electrical. Thanks.

[@simpliciocamirino2271]

thank you for that sharing.

[@harineupane2651]

Can we connect changeover switch in this type of motor to run in forward reverse mode

[@julianmac]

I love the South African accent

[@nenadmanasijevic4508]

I hooked the motor up this way and it works but it seems to me that it works a little too warm. I don't know if that's normal. I'm going to check if the cap values are the right ones.

[@micdal22]

Thanks for a great video, useful information. I have one question: Under the circuit diagram you provided, the centrifugal switch only cuts out the START CAP while the START COIL remains in play when the motor is running. Are you certain that this is correct? Shouldn't the RUN CAP go between Z1 and U2 (N), so that the centrifugal switch cuts out the START CAP and the START COIL?

[@p0we111]

Thanks for the compliment. That might be true for a capasitor start motor that only uses one capasitor. This is a capasitor run motor that uses two capasitors. If you are using a motor with only one capasitor be sure to search for a diagram with only one capasitor as it wil differ from this one.

[@unobianconero5751]

for a 3 wires ac motor (common wire, start and run winding) with one capacitor (for starting) which wire should be plugged to capacitor? is it right to plug the common from the motor to neutral, live to capacitor which the other wires are plugged to the two terminal of the capacitor? or live to common and neutral to capacitor?

[@atishpatel1283]

Hi, this is very useful. My single phase motor wiring is not labelled. I think my running coil is connected to my starting coil and also my so called 'V1' is connected in series. Any ideas how I go about wiring?

[@narenderverma4203]

Super explanation

[@egeregagabriel4086]

This is Very clear and straight. Sir please, what could be the cause of a single phase motor that suddenly dropped in speed

[@alcolyles8914]

Would that diagram be the same if it were a 220v motor obviously replacing the neutral for a second 120v wire?

[@emresen8060]

Sir can u give me a thought about what can i use to drive a single phase asychronous motor without capacitor on it

[@abigailkhonkhe2487]

Best explanation. Now how to contact on a panel

[@kostasnikonor3770]

Thanks that was useful!

[@buhaymoto5614]

sir can i ask a question? in d winding connection wer is d one who connect is in the line d begging or the ending winding og the motor, both running and starting?

[@ciarangcoyle]

Hi Jean . I have just bought replacement motor for a compressor and it came pre-wired. However the set up is not the same as yours from what I can tell. can you review it and comment as all I should have to do is connect the live and neutral supply? I really do not want to compromise the capacity or motor . Let me know if I can contact you.

[@paratimimusica989]

Jean B. Thank you for the information. It's all I need.

[@paratimimusica989]

hello. What are the data of the motor: HP, V, A, Hz, Poles, etc? I'am rewinding a motor similar, but I have not the data, only I know that It´s a 3 hp motor. I need the rating of de run and start capacitor, and the voltage. If you have a data of this motor, I´ll be gratefull with you. Thanks a lot.

[@sakarna]

Thank you very much. Explaining very simply and clearly.

[@MVS666]

The following is correct: (1) Running Winding + Starting Winding + Neutral (2) Running Winding+ Starting Coil +Running Coil +Phase (3) Starting Winding + Running Coil+ Centrifugal Clutch (4) Starting Coil + Centrifugal Clutch

[@SG-pl4dl]

Can you show how to change rotation?, my motor only runs counterclockwise even switching the power wires Thanks

[@transformer889]

The reason a capacitor used in induction motors in an induction motor is to make motor start rotating. An induction motor when it is powered up it will not turn but vibrates. The motor can start in either direction CW or CCW by rotating the shaft by hand. , to fix this problem an additional coil is built into the motor to make sure the motor start in the correct direction (here it is called it starting coil). A capacitor added to the starting coil to generate starting torque in the motor which later disconnected by a mechanical switch. short explanation but you can research it yourself.

[@otaznikvykricnik5961]

As to my knowledge, you are right :)

[@joanofarc708]

Thank you very helpful

[@joebrand619]

Very good, I agree.

[@MrPaulb1990]

A great video and stopped my capacitor bursting. One thing I’d like to know, is how you would get a motor like this to be able to go clockwise and anti-clockwise wt the flick of a switch.

[@waleedellafi1240]

You have got to reverse the connection of either main or auxiliary windings connection

[@MrPaulb1990]

Waleed Ellafi any ideas on how to do this?

[@Mark_How]

Hi Jean, dunno if I missed it in the video, is there a way to reverse the direction the motors running?

[@p0we111]

Hi Car Just change around the start coil polarity. (just flip it around)

[@Mark_How]

@@p0we111 it works! What a legend!

[@alanmarriott9216]

I tested one set of terminals and had 0.00 resistance. Would centrifugal switch be that low?

[@amradel7664]

First of all thank you for your effort .Please how i calculated the value of the capacitors

[@simpliciocamirino2271]

thank you for that sharing

[@labis6466]

Hi, i have a single phase motor connected with an inverter but it doesn't have a capacitor, if i need to disconect the motor from the inverter do i need to install a capacitor on the motor? Thanks.

[@winminhtwe551]

Thank u so much.. great…

[@africaunite2488]

Thank you very much

[@viswanathaniyer2372]

good video

[@pieterpieterse9889]

how do you change direction on this motor?

[@hosseinkarimzadeh3085]

So you conect start with run with live and conect another start with cental s and lower capsitor . and run with other swith with hi capsitor am i righ

[@drewjbx228]

I noticed the Green/Yellow wire coming in was not connected to ground inside the casing of motor, so it is not required?

[@zemogm2k]

Lesson learned.. Thnk you.. Question : what is the usual running coil resistance? Checked mine and it's 15M ohms.. Is that right? Thank you.. I hope you could enlighten me

[@p0we111]

Hi. It will depend on the size of your notor.

[@KeithKropf]

15MΩ is an open circuit- you have a broken wire or broken connection somewhere in that coil. The run coil resistance should be low - around 5Ω to 10Ω

[@jorgecueto9649]

Thank you for the diagram

[@AmoahMatthew-pl9hq]

Nice work

[@mdjoy414]

Nice video

[@TheQuijote76]

Hi, on 3:16 you show a connection diagram, my single phase motor has one on the front but it has two Lines(L) instead of one L and one N. How should I connect this. It has a start capacitor. It is a Siemens .75 HP motor.

[@anthonypowell5361]

great article....

[@geoffjones6869]

I have been looking all over YT for this information. Thank you very much, great video. My motor has it's wires disconnected I have no idea were they go. To complicate things even further it has three cap, one has start written on it, the other two has 15uf I assume these are for run. Why are there two run capacitors? Can anybody help me?

[@p0we111]

Hi Geoff Does the nameplate on the motor state 3 capacitors or just 2? Thevtwo capacitors might have been used as a single langer one when connected together. Do you have 6 wires? What are the resistance between each pair? That will help identify the coils and centrifugal switch.

[@geoffjones6869]

Jean B thank you very much for your help. I will check this out tomorrow 12/11.

[@panchogonzales6409]

Wow! Thanks!

[@gearb69]

I followed the wiring which was correct but the labeling of the terminals on the schematic going from right to left from the centrifugal switch to the should be V1 to V2 and Z1 to Z2 for the start coil, to provide clarity for what was actually wired in the video. For beginners it can be confusing; good practice makes sense for more complicated wiring in the future.

[@shemarmurray9500]

I noticed that too thanks for clarity

[@asaproengineering]

I connected the same, but my motor is rotating in both direction clockwise and counterclockwise direction could you please guide me what is the problem Thanks

[@RollingEasy]

Very good video... Thanks..... How do we reverse the motor direction if need be?

[@p0we111]

Hi Tom Tee Just change around the start coil polarity. (just flip it around)

[@RollingEasy]

@@p0we111 All connections remain exactly as you've shown but 'Start Coil' 'nominal' wires Z2 and Z1 swap positions (one for the other), on the terminal block... That's the flip?

[@p0we111]

@@RollingEasy Exactly. Well put.

[@drlightman5848]

Thanks for this explanation, but can you clarify how to calculate the capacitor values for the exact motor?

[@p0we111]

Hi. The best way to get the values of the start and run caps is to google the values of the capacitors using your motor size (in HP or KW) as well as the voltage in your country (could be 110V or 230V) If you dont find anything,share the information on here and I can try to help.

[@FD-ms2nm]

Can you make a video on how to replace a mechanical centrifugal starting switch to an electronic centrifugal starting switch. On this same type of motor.

[@Swenser]

I've got a YL90L motor with wiring diagram on motor, but is it possible that it is in error because it shows a link which would short out starting cap. Surely that is error in printing label, right?

[@p0we111]

The start cap will be bypassed once the motor is started so it could be right.

[@Swenser]

@@p0we111 sure. The in series centrifugal switch will open to do that. But the diagram is showing a permanent copper link across the cap eliminating the cap altogether. For the clockwise diagram it shows the cap connected as you'd expect. But the anti clockwise diagram must have the extra silly line shorting across by mistake.

[@p0we111]

@@Swenser In that case Im with you. That does not seem right.

[@ahmedmeman7439]

thanks for this video. its my first time connecting a motor and thanks to your video it was a breeze. when you say change the start coil polarity to change direction what do you mean. sorry I am new to this your help would be greatly appreciated.

[@p0we111]

Hi Ahamed. Glad I could help. Changing the polarity means just swap it around. Put Z2 on the side of the Live and Z1 on the side of V1.

[@ahmedmeman7439]

Jean B thank you so much for all your help. Cheers

[@danielgrop7565]

As comnents below a small contribution... if I'm not mistaking z1-z2 and u1-u2 wireing Order might differ as it may change the rotation sense. Correct me if I'm wrong... that's what I've been looking to find out by watching the video as

[@neillourens5198]

Thank you so much for this video. just had to repair such a motor. this video was god sent . Hi 5 :)... however, how do you change rotation?

[@p0we111]

Glad to hear. You have to change the polarity of the starting coil.

[@neillourens5387]

Thank you. Much appreciated

[@marcoabanio9969]

my single phase motor says D1, d2 , d3, d4, how to know which are the same in the u1 u2 z1 z2?

[@p0we111]

Hi Marco. The only way for me and you to know will be to follow the steps in the video. That is the only way unless there is a drawing somewhere on the motor you can compare to my drawing.

[@ahmedabdulamir6190]

Thanks

[@haronkipyegon8019]

Does the centrifugal switch have polarities please?

[@p0we111]

Hi. No it does not matter which way you connect the wires on the switch.

[@haronkipyegon8019]

Thanks much sir

[@zoozolplexOne]

Cool !!!

[@mikebryan544]

Ace thankyou

[@lousolari5173]

can the motor rotation be changed

[@p0we111]

Hi Lou Just change around the start coil polarity. (just flip it around)

[@solo8827]

sir, how will i remove the problem of fluctuation during starting? i noticed during starting the lights will fluctuate.

[@p0we111]

Hi Solo. That is very difficult to say without being there at your installation. A common problem is voltage drop. That is where a cable is run for a long distance and the cable thickness is not adequate for the loads connected. The cable might be the correct size for the amps but not for the voltage drop over a great distance,that is when you get a dip/flikker in the lights. This is only guesswork on my part,not being able to test myself...

[@solo8827]

@@p0we111 thank you for this tip. i might try replacing the cable. i am also considering the possibility of installing a soft start module..

[@duncanmaina2965]

Very clear explanation kundos

[@joradotech8710]

Fabulous

[@LAW-fv6ys]

I have the exact same connections and a start and run cap. If I connect it up like you have it will start then slow almost to a stop then start again over and over. If I follow the wiring diagram I found on the net for my motor it's won't start it just struggle to even turn. Motor is YL90L-2. My start cap is 200uf, the run cap is 40uf. U1 and u2 is 1.7 ohms, w1(z1) and w2(z2) is 2.0ohms. V1 and v2 is closed circuit 0 ohms. Its a brand new motor. I also tried another wiring arrangement and it ran to about 30 psi for 2 minutes before it started slowing and then accelerating cycling. I just can't believe there isn't a proper diagram that I can find showing everything the connections the caps where they connect for this motor. The useless diagram just show the terminals and links for cw ccw, no mention where to put the caps. 😢

[@ssonicx135]

According to the diagram, the start coil will always be connected. That's right?

[@joebertgeneta3942]

No, the run coil is the one that is always connected, the start coil is disconnected after ataining the synchronous motion

[@otaznikvykricnik5961]

@ssonicx135 I think you are right. According to the diagram the current is flowing through the start coil all the time. The switch discinnects only the start capacitor. Both capacitors are engaged at start (parallel connection, C=C1+C2), while at operation only run capacitor is connected. It seems to me, that the engine gets started by the two capacitors, but not by the start coil. The start coil is connectet all the time, both start and run, current flowing through it all the time, doing whatever, more harm than good. Therefore the motor overheats, as somebody mentioned above. Please, somebody correct me, if I am wrong. I'm not electrical engineer.

[@ssonicx135]

@@otaznikvykricnik5961 Exactly

[@artantani7948]

There are three coil in the motor so the 6 wires with the diferent active rezistence shoul be included

[@p0we111]

Hi Artan For a 3phase motor there would be 3 coils and 6 wires. For a single phase motor with 6 wires, there is 2 coils with 2 wires each and 2 wires of the centrifugal switch that switches off the start coil when it reaches a specific RPM.

[@johannlangner289]

Are you a South African? Like your accent

[@khalidddddddd]

I didn't get about centrifugal switch how it get on and off

[@p0we111]

Hi Khalid. Its an automatic switch. It is located inside the motor.

[@chooper3048]

is that 3 phase run to single phase

[@siphomayisela288]

This is a 3 phase motor not a single phase. It seems as if it's only me and you that can see that.

[@paolocaso6734]

Hey just looking for some help.

[@garypeatling7927]

Kept saying doesnt matter which way wires go surely would run backwards but could be wrong

[@TheLmcena]

How to connect reverse forward

[@p0we111]

Hi. Just change the polarity of the START coil (just flip it around)