Basic Motor Control: 3 Wire Start Stop Circuit (updated)

#AccessToPower #MotorControl #AccessElectric
accesstopower.com
In this video, I demonstrate a 3 wire Start/Stop circuit with multiple push buttons. This is an update of our original video by the same name • Basic Motor Control: 3... . In this video, I try to show the field wiring as clearly as I could while at the same time, showing the live wiring schematic. I made this video in response to several comments from viewers who were looking for more clarity. So here is out updated 3 wire start stop circuit video. I describe each of the components involved, such as the motor starter, overload, start pushbutton, stop pushbutton, and control power and how they work. I then screencast a simulated circuit so you can visualize exactly what is happening in the Start-Stop Circuit.

[@Bloodhound_Dogg]

This is the best explanation that I have seen on the Internet

[@AccessToPower]

Thank you for your comment! It’s highly appreciated.

[@dannywhite4574]

This is by far the best Start/Stop with holding circuit explanation on KZbin. Nothing else comes Close!!!!

[@AccessToPower]

Thank you for your comments! I really do appreciate the feedback.

[@danielteyehuago1633]

Exactly

[@danielteyehuago1633]

​@@AccessToPowerwell done sir... We need more of such videos

[@ANG3LiiToVU3LA]

Finally some easy motor control explanations. Where has this video been! Thank you for your video.

[@mikeode1020]

This is awesome. Far and away the best teacher I've had in my life when it comes to electrical. Big thank you.

[@koarivera9151]

By far one of the best instructors on KZbin right now coming from a Utah Journeyman

[@luis_ayala_134]

Great explanation. Please post more content on the start/stop with holding contacts and also on how to wire up a motor starter.

[@miraqa7258]

What a great video, I learnt more than what I studied along the university by whatching it once.

[@AccessToPower]

Thank you

[@mrenglish4766]

The penny finally dropped ! Thank you.. That latching circuit has had me wondering for quite a while and your video explained it perfectly :)

[@AccessToPower]

Mr English that’s great!

[@YUTENGHU]

thank you very much from 2nd year apprentice in Vancouver Canada

[@jhonnyrestrepo6780]

Thanks Walter. All the information you give in this video is very useful. The way you explained these concepts, makes it easy to understand. Keep going with this type of videos. Greetings from Colombia.

[@YUTENGHU]

hope one day I can share my knowledge to help others just like you

[@samsonchavonga633]

Anyone to explain for me the construction and operation of a start push button

[@gregkuester8989]

Wow excellent demonstration. Great job!

[@devonsalmon7554]

Thanks for this video. Please do some more. I am getting closer to fully understand motor control circuits.

[@mannyclemente7159]

Keep doing updates like this Walter, I have subscribed and will keep watching and supporting your channel. By far your presentations are some of the best I’ve seen on KZbin.

[@AccessToPower]

Thank you Manny. We will start making new content soon.

[@geraltofrivia6082]

Thank you Walter, you're a gentleman and a scholar!

[@davidnunez7889]

Awesome video thank you best explanation I have ran across

[@ericweiden6232]

Can't say enough good about these videos you are a great teacher thanks

[@AccessToPower]

Thank you

[@KIMKim-ql8zx]

This is the best video ive seen on the topic! Nothing more to say.

[@locomm]

Thank you for taking the time, this is extremely helpful.

[@davescheffler3383]

thanks for these great teaching videos! you are a great teacher!!

[@AccessToPower]

Thanks for the positive comment! I really appreciate it! Glad the videos are helpful.

[@davidnunez7889]

Awesome video I had people explain that to me but I just did not get it your explanation was to the point thank you

[@jason91205]

This is a great video. He explains this in very good detail

[@makis364]

Amazing!.You are the best youtuber electrician teacher!.

[@eldernuru22]

Thank you very much for your explanation. You still need to do more by providing detailed explanation of d wiring of d contactor, overload relay, and start stop buttons.

[@analajaji]

Very clear explanation. This gives me confidence to make sense of all the wires in my motor control panel.

[@AccessToPower]

I am glad it helps you. Be careful out there.

[@salemslam5653]

Thanks , your explanation with this plate is very good.

[@keegankelly4115]

Thanks mate! Clear precise explanation although our cable colours are different in Australia this was incredibly helpful

[@freddiestewart9233]

Great video thanks for taking the time out to help others master the skills of a 3 wire start stop circuit!

[@ablk756]

This should be show to all people learning. You’ve taught me what college never did. I was a bit lost with it all but this has completely made me realise where I wasn’t grasping it. I appreciate it!

[@daveytovar5663]

Same

[@luckystrike600]

Great job explaining, thank you!

[@luckystrike600]

👍🏼

[@raycaballero6386]

Very informative, could we see more configurations on this and cabinet wiring in general. Great stuff

[@fredrickhongo5039]

I like ur tutorials..in my country let me call you Mwalimu means teacher in swahili

[@lagubamax7432]

This is realy helfull to study to get prepared for my trade test

[@nukeelda]

If you can do something simple motor control through PLC same setup just in plc,I'm going to school for automation soo need all of this and you do great job on all aspects...Thank you Sir.

[@mohammedhanif4164]

This is a awesome I am big fan of you sir jazakallah khair.

[@petersmith9254]

Huge fan can you do a explamation hand automatic switch wiring or a explamation

[@DorrettMcLean-cg1eu]

Great knowledge i appreciate, thanks to you

[@roninbjj498]

your videos are great ! Thank you very much for the help.

[@AccessToPower]

glad to help. Thanks for the comment

[@ProfessionalKazak]

You are so awesome thank you

[@justingoodsell7792]

Awesome videos! Thank you!

[@stnice6468]

thank you very much

[@angelgonzales7574]

Gracias thank you it help me a lot

[@legancloete2462]

man this is amazing! thank you!

[@prodson8310]

Thank you. Great video

[@lifeispain7256]

Thnks for sharing. A little compuse about sa fuse the neutral on overload

[@abeehaoo7509]

Sir nice information you tell us

[@nanawilliams5683]

Thank you very much Sir.

[@tohziumdawaisok6556]

Very informative. I learn alot

[@AccessToPower]

Glad the video was helpful to you!

[@WestHaddnin]

I fucked off my whole 3rd year of electrical apprenticeship n never payed attention in the LaBs on how to set this up. Now 4 years later I’m trying to pay attention because I’m on the roof and might come across this lmao

[@alexsails80]

Walter great information. Do you have a video or diagram explaining this same concept using a DC off/on/(on) switch? One off/on/(on) switch in one location and second off/on/(on) switch in another location. Start the engine from one location but be able to shut down from either location. Like a rocker switch used for diesel engines to be started and shut down from more than one dashboard. Thank you

[@devanandmohabeer4708]

Love this video

[@gilbertwoo9442]

Thank you for your sharing.

[@madewithlove1111]

Life changing video

[@theastuteangler]

Legendary. Thanks dad.

[@conceptsken1]

Thank You! Very well done.

[@fujchi2172]

Great videos, thank you. The next step (question) would be adding a reverse direction circuit. Start forward, start reverse and stop. Have you done that video?

[@AccessToPower]

I have done a Forwad reverse starter circuit on my channel

[@yima-every]

well explained thanks

[@djohnson9663]

Very good content!

[@mikeyjay917]

Paint the edges of the feet on your stand white to match the rest

[@radiomellowtouch]

Use white background for your schematic and match the wire colors with the actual wiring.

[@want4onlyone]

Thank you. This is great.

[@davcot3675]

Great job. If I could add an Estop circuit. E stop relay that would be awesome TY

[@Dave-ci5qd]

Thanks Great video

[@socalwoodmarquee]

Thank you sir !!

[@sc_archery86]

Great video.

[@rajeeshkumar7801]

Pls give more controlling circuit videos

[@lawoull.6581]

Awesome

[@davidhamilton2708]

Great presentation, but could u give a diagram of wiring for the contactor?

[@mikeyjay917]

Is this the 2nd part of something? Where's the black wire come from why are there 2 reds and 2 greens? Those you've described well,but not the grey thing with 20+ places for wires to go

[@arttistika6514]

Can you add a red light indicator to this pelease, i need to know how to wire it

[@christophertullous9935]

Hello, I like the software you use in this video, what is it called please? I'm new in this field but am required to know basic motor controls. I'd love to know how to draw a circuit out on a computer and see if it works.

[@AccessToPower]

Hi Christopher. The software is called Constructor. Here is a link to that www.cmhsoftware.com/constructor.html

[@benjaminbuabin6976]

You are the best

[@thehighvibe5528]

excellent thank you!

[@tracymckenzie5099]

Nice 👍🏻. Very informative. What about a 240v coil on a single phase starter with a stop, start?

[@AccessToPower]

Hi Tracy! With a 240 volt coil you will wire the starter and the buttons exactly the same way. Line 1 of your 240 volt circuit will,wire through the buttons and to the starter the same way. The difference will be that instead of wiring the neutral wire through the Normally Closed overload relay and to the coil, you will wire Line 2 of your 240 volt circuit through the overload relay. Also remember the single pole fuse switch I show on the control power circuit would need to be a 2 pole to disconnect both legs of the control power 240 volt circuit at the same time.

[@VaishakKandoth]

Can you do a video on this?

[@sagate5180]

hello , i need your help please , i want to change a start button with two buttons , so that when i push them in the same time the motor start , if just one button is pushed the motor doesn't start , how can i do that ? thank you

[@derekr1124]

What program are you using to draw out the circuit ?

[@sreerajc.k450]

Perfect👍

[@oscar27ization]

Thank you for the information sir, but where is that wire coming into the auxiliary contact from? The one right next to the breaker

[@jimlopez8197]

Does anyone sell a kit with those exact components? I’d buy it just to practice with.

[@adrianfrancis1156]

Question why start buttons are wire in parallel?

[@paulmanhart4481]

Why do you have two stop and start buttons?

[@AccessToPower]

There a many occasions where you may want to start or stop a motor from multiple locations.

[@danschumacher5427]

Mr resendes what kind of program you used Sir

[@AccessToPower]

It’s called Constructor

[@jessel2805]

thank you!!!!!!!

[@bryanmitchell4761]

Great job!

[@ivanguerrero3923]

Thank you very much I'm a big fan could you explain how to wire a hand off auto

[@AccessToPower]

Ivan Guerrero , thanks for your comments about the channel. I made a video where I went over a HOA. Here is a link to that video. kzbin.info/www/bejne/Z3uWZ4adhaZ1fNE

[@robshuey6881]

Great video. Do you have a link to your wiring diagram in that video?

[@AKBRONCOSFAN007]

Why did you wire the neutral to the bottom of your overload protection device? If you explain that in a bit more detail that be appreciated, thank you. Other than that I understood the information presented in the video.

[@AccessToPower]

AKBRONCOSFAN007 The overload is a normally closed safety switch. I wire the neutral to one side of the overload, and the other side of The overload is wired to the coil on the starter. This feeds one side of the coil. So a neutral is always available if the overload is not tripped to the coil. When the start button is pressed and the whole circuit is engaged, 110 V is applied to the other side of the coil. So if you lose

[@AccessToPower]

AKBRONCOSFAN007 Power than the quail will turn off or if the overload trips and you lose the neutral the overload will turn off.

[@SH-pc4xt]

@@AccessToPower Just piecing it together w/o typos: So if you lose power to the coil the contractor will turn off. This will happen when either you lose control circuit power (fro coming through the breaker due to power failure or turning the breaker off) or if the neutral overload protection NC switches open in response to overload condition. Either of these events will cut the neutral connection to the contractor coil, shutting off both the power going to the load and the hot (red) line going to the top side of the contractor coil.

[@123verne]

Why does the neutral have to go through the overload relay and not just straight to the coil (A2)?

[@AccessToPower]

If the neutral went straight to the coil then the motor starter would never trip due to an overload

[@123verne]

Ok thanks

[@davidhamilton2708]

Great video I just wanted to know what program are u using to represent the components… autocad? Great video!!!

[@AccessToPower]

The program is called Constructor

[@adrianbano6704]

Can we strait energize the coil without using auxiliary contacts?

[@AccessToPower]

Adrian Bano, yes you can send control power to the coil without auxiliaries through a maintained selector switch or something similar. The only thing to keep in mind though is if the power is interrupted and restored the motor will immediately start running again.

[@adrianbano6704]

@@AccessToPower Thank you

[@jamesromero6646]

what kind of starter is that?

[@ikecostner1]

What is the trade name of that contactor? Is it a 3 pole contactor with 2 Auxiliary contacts?

[@jackchen3109]

Thanks

[@dustinfringe3557]

I’m a hoist technician’s apprentice and I’m having some trouble with terminology. What is the distinction between the “X1” and the “X2” side of the control circuit?

[@jimmysutton286]

X1 is the control power X2 is the other leg of the control power, either the "neutral" of a 120v cct or the other leg of a 240v cct.

[@devonsalmon7554]

Walter, I have a question for you. Does the position of a overload change when the start button is pressed? I see sometimes the control circuit is passed through the overload before it is connected to the stop button.

[@AccessToPower]

Devon Salmon the position of the overload contacts does not change when the start or stop buttons are pressed. Th OL contact position only changes in the event that the OL trips due to the motor drawing more current than the OL is set for. This then opens the NC OL contact which interrupts the control circuit to shut off the starter and turn off the motor before permanent damage is done to the motor.

[@devonsalmon7554]

AccessToPower ok. Thanks I have learnt a lot of things from you since I subscribe to your channel. There is one circuit I would like you to explain for me. It’s is a two float control circuit for a lift station. A lower float switch and a higher float switch in series that control a pump in a lift staton. The lower float switch comes in but does not start the pump until the higher float switch is activated. And the pump does not shut off until the lower float switch is de-activated. Thanks in advance.

[@AccessToPower]

Devon Salmon I’m glad the channel is helping you to learn and thank you for the suggested topic of lift station float operations. I will try to make that shortly

[@earthrelated]

Can you share the diagram please?

[@tobiasazarias4158]

What that light blue wire doing on that terminal next to the CB

[@AccessToPower]

I think you're talking about the light green wire that is next to the circuit breaker. I didn't talk about this in the video because this is my ground wire. This wire is grounding protection.

[@thethreeamigosalonzo3173]

How does this work for using this on a ansul system

[@AccessToPower]

with an annual system you will need a couple starters. One, the hood exhaust, will remain running in the event the Ansul fire protection system goes off, while the other starter, for make up air needs to turn off. That is so you don't pump oxygen into the room and feed the fire.

[@robertwayne4273]

Any new videos coming out soon???

[@AccessToPower]

Hey Robert. Yes more videos will be coming out soon. Been working on lots of projects so stand by and thanks for you patience.

[@keving1774]

1:04