Very well done! All tutorials should be this easy to understand. I have absolutely no doubt now how to identify a running or start capacitor or how they shouldn't be used. Thank you!

This is one of the best UTube videos I've seen. You explained the capacitors & their uses very well PLUS you blew one up for everybody to see how they fail. Yeah

Just what I needed at this moment. Thanks for taking the time to share.

I can’t tell you how many capacitor videos I’ve watched. This video gave it to you in layman‘s terms it shows you a start capacitor had to run capacitor and how they work. Very good.

Compact and clear yet propper information to get going with, great video which helped me forward

Awesome video! Thanks alot for taking the time to make this! Funny the background behind you, because this is exactly the info i needed to complete my RPC and get my shop back online!! Thanks again! Awesome!

Great Video!!! thanks for explaining the two different types. I know nothing about them. Installed a start capacitor in a run setup by mistake and it blew up right away hahaha. Now I know that it needs a run capacitor to work. Thanks again, saved me from buying a new motor for the bandsaw

Excellent! Just what I needed to keep from blowing myself up. Got the new "start" cap installed and motor running.

Best explanation ive watchd out of 25 vids. Thank u

i took hvac class about 8 years ago ,,,thanks for your video ,interesting . love to learn

Great Video. Simple and concise.

Excellent demonstration. Good info on the differences.

Hey thank you for making this video. ;) 100% educational and professional all the way through.

"IF" the clock on the back wall was accurate, you did this in one take. Until you started blowing stuff up, you just kept rolling without a bleep or hiccup. Sometimes people aren't just watching what you do, but how you get it done as well. Very good on both counts. Congratulations.

Thank u for the info sir, this is exactly what I need to know for testing a start capacitor.

An educational promotion; don't see that very often in youtube land - well done :)

Good Video! Thanks for Sharing! Happy New Year!!

Thanks for the feedback - we'll definitely keep the audio quality in mind for future videos.

Looks so good, high quality built

Thank you for watching! Glad you found it useful.

thanks for the demo

Great work if you have any more heating or air conditioning tips I like to see them very knowledgeable

Great video but one thing to note.... When recording the video I think you had the sound levels volume to high for your microphone., that is why the volume is kind of popping up on a lot of you words. thanks.

Thank you. Very informative video

you have provided me knowledge and one day I will reciprocate by buyimg parts from you. that is how the world should be.

Thank you! Great video!

Very well done. Thank you

Great Video. THANKS!

Nice job dude,thanks

This is a great video. I have a question about capacitors in parallel, specifically for a well pump. I have not opened my control box yet to see if my well pump controller uses a start capacitor or a run capacitor. Is there any danger in paralleling that capacitor (provided it is the same type) ? I’m in the northeast and we recently had a tornado that left us without power for a week, my generator was struggling with the peak inrush current for our well pump when there were other loads drawing on it at the same time. I wanted to see if I could alleviate some of that stress with an additional capacitor. Any knowledge you have to offer on this would be appreciated. Thanks in advance.

Thang you for that sharing sir.

Thank you again for your help.

@TEMCo Industrial Power My start up capacitor on my compressor is only 31.5uF at 400v (2 terminal) if i buy a much bigger uF rating ie (400uF) would it make my compressor start easier. Mine at present doesn't always start up every time, sometimes it buzzes upon start up and freezes,if i spin the motor by hand it will start up, is my start up capacitor faulty and would it cause these start up problems??

Very nice video, thanks!

Well worth watching.

Useful video !

You are very well spoken, thanks for the vid!

I would like to see the voltage meter readings when you are checking the capacitors in this video. Thank you

very professional thanks

great Video thanks

Good Video. Very well done. In your demonstration are you just throwing raw AC power across the caps with out any type of a buffer in the circuit? Thanks.

Tip ... never use headphones 🎧 in full volume for this video specially starting.

Is the voltage spec on a Start (or Run) cap an absolute value? In other words, will a 250v rated cap work ok in a 110v circuit, given the µF is correct ?

Thanks for the video =)

Thank you for that sharing sir.

Good. Helpful.

I was looking at Baldor 6" Bench Grinders. They have approx. 14 different models! One of the descriptions says: Built for heavy duty grinding, powered by 1/3 hp Baldor PSC type motor (except 612E & 662E which are split phase) What would be better for that type of bench grinder, a (PSC) Permanent Split Capacitor or a Split Phase motor? Is one harder or take longer to start? Do you have to spin the wheels to get it going?

Some capacitors are 1000+ mfd, though many have low capacitance ranges as well. In your case, you could easily use a run cap in place of a start cap. Some capacitors are built with a "Pressure Sensitive Interrupter" design that causes them to fail before internal pressures can cause serious injury. The one we showed is designed so that the top of the capacitor expands and breaks internal wiring.

Great video! What ohm and power is the discharge resistor you used?

great video, thanks

I have an older AC motor that is 240v and runs two capacitors. I went to fire it up and one of the capacitors smoked up. The other one was entirely cool and I noticed it doesn't seem to have any juice in it. The smokey one was spraying heck all over the place. My suspicion was that one capacitor went bad and it wasn't able to get up to speed and thus the centrifugal switches weren't able to kick in and it smoked the other one. Does that make sense or am I completely off the mark. Also for replacing these would I need 120v capacitors since it's one capacitor on each 120v circuit or would I need two 240v capacitors? Mine also don't have the bleed down resistor on them, not sure if that's necessary for the newer ones or not. It's an old saw from the 20s but the motor is definitely newer. Stumbled across these videos from your ebay auctions. Figured I'd see what you guys have to say on it.

Great video! One question: You mentioned that run capacitors have a 100% duty cycle so they can remain in the circuit. I want to use these capacitors for a pf correction project on an induction motor, but as my pf will be changing, i need to provide nearly constant switching in which the caps are introduced and taken out of the circuit. Is this safe to do for run caps, or should i use a different type of capacitor? Thank you in advance!

Hi there, I am looking for 6 microfarad x3 capacitor. Could you explain what type 9f capacitor it is? Thanks

Great video

would one for a celin fan that has the same UF and voltage work cause i can find those but not the round ones

Your video on differences between run and start capacitors is very good. What you did not mention is the larger capacitance will deliver a certain current for a LONGER (time) as required. One can obtain the same current level with a small capacitance but the time constant is much shorter, and this will not work! In reality, current delivered by a capacitor is determined by I=V/R. Remember there is a time constant! For example a voltage of 100 volts across a capacitor with a 1 ohm resistor across capacitor will deliver 100 amperes (time constant not taken into account,) Capacitors can more or less be inspected on performance by using an ohm meter on the megohm scale, across a discharged capacitor. Reading should be in the megohm or higher, Basically an open circuit. For quality, apply the operating DC voltage across the cap. to charge. Then install a DC Ma meter to view current flow into the capacitor. This determines the number of DC ohms of this capacitor, ( ohms =V/I ) and shows the power factor. The higher the Ma flow into this capacitor, the worse this capacitor is or is rising to 1, power factor. Power factor is PF = R/Z. It should be 0, or almost no current flow indicates a good capacitor! (R is extremely high.). FYI, there should be no heat detected at any time. To increase capacitor life, add parallel capacitors at the same voltage but adding to required capacitance only , not over. For example a 100 uf cap. can be split twice of 2 x 50 uf or more. Splitting the current demanded by the motor capacitor is always easier on a cap. when multi units are in parallel, and this results in added capacitor life! You might need hundreds of amperes for starting and the small R of the capacitor adds up when delivering lots of amperes, resulting in heat in the capacitor, a no, no.

Is it a good idea to install a start capacitor if compressor run capacitor keeps blowing? Could this keep the unit working for a while until it can be replaced?

I have a 3/4 hp bench grinder with a PTC relay for the start winding. The PTC relay is bad but I can't find any for a 3/4" hp motor. Any suggestions?

A great tutorial easy to understand and concise. Thank you.

hi.. i gota a 1ton AC works on 240v ac. its got 35uf cap for compressor. can i add capacitor bank to reduce amps draw. if so what consequences i have to face. kindly explain.

can u help me find these videos on how to test a DC motor, slipring motor and a single phase motor..its for my trade test that am writing monday..Or explain to me how to do these test

How do you know what size compasotor to replace the compasotors with if there's no label or writing on the old compasotors and there's 3 compasotors on this air compressor and how do I find out what one is the start and run on this compressor?

I have a 36V forklift with an ailing capacitor rated at 150uf and 250v (250 P.V.W.) The part number on it is FB-887 and it seems to be impossible to find. Would I be able to run an array of smaller run capacitors adding up 150uf?

Hi I have a air compressor used for painting cars, when its very cold weather the compressor sometimes won't start up. When i pull the red switch up to start it, it buzzes loudly tries to start but doesn't have enough power. If the weather is hot, then most of the time it starts. It has gotten progressively worse at starting now it's about a 50/50 if it's going to fire up or not, when it does start it runs perfect and generates lots of pressure. If i helped the motor along with my hand by spinning the fan blades it does start, sometimes it starts slowly whilst buzzing then gradually build up speed then runs okay after about 10 seconds. Does it sound like the start capacitor at fault? , I do not have a run capacitor on this compressor. Could the start capacitor (faulty) CAUSE ALL THESE ISSUES?

Love your video!

I wanted to know the power supply voltage you were using we understood it was AC but is that a 120 plug that you hooks to the capacitors directly I want to know it's capability can you put a wall outlet directly to one of those running capacitors?

2:41 consider this when considering adding a capacitor to my living room bathroom exhaust blower motor to stop it from getting stuck on start up.

Hi will a microwave capacitor 1.1uf 2100vac 50/60hz can be charged by 12 volt battery ? Can it be used to between the battery bank and inverter to not let the battery bank take the brunt of electric initial draw. Saving battery. ?

Thanks for the info! Do you sell high voltage pulse capacitors?????

I need a lil help.. I am trying to get a pool pump motor to run off of my dc to ac inverter and just hums and then the inverter shuts down. I think if I add a start run capacitor to the circuit it should work fine. I am hoping .. it’s a 120 volt 12 amp 60 hrtz motor. Which start/run capacitor do you recommend. I am thinking a CBB 65 will work. But don’t want to blow the motor.. any suggestions ?

I have a 2002 Fleetwood Bounder 32' rv. One of the rooftop (Coleman Mach) air conditioners stopped throwing cold air because after getting up there to check it, there was oil everywhere on the wires and it smelled from the wire casing melting. Is it safe to just replace the hard start capacitor, or should I replace all 3. (There is a bundle of 3 there). Thank you for any thoughts and/or responses. (Roger)

Good video

Are common and run terminals on single run capacitor interchangeable since there are no markings?

Terima kasih banyak .....

have a single phase century 5 hp 1800 rpm motor, has a 330 volt 408 to 480 mfd cap that blew. it runs with a 220v cap i have in stock, similar mfd range, is that ok to use in an emergency?

What capacitors should I connect to the 400Watt generator, any suggestion please . I am using capacitors 8 micro farad and as soon as I plug in the light. the power is gon generator is 650 watts

I have a Lakewood floor fan that runs slowly or not at all on low settings.It does not seem to be a lube problem. Any ideas.

Do you have to change capacitors with exactly the same one or is similar or close capacity ok

Hey man.. Great video, my motor is humming, I swapped over a capacitor I had in shop, it started motor but cap exploded hahaha after a minute, I will drop a link for my problem, it is a pdf file with all parts listed, I think it is a run capacitor I need, it's the the 66uf 50Hz.. One on the list thanks you my good man

Well done

I have a 10hp 230v three phase air compressor I am wanting to run on 230v single phase what start capacitor and run capacitors would you recommend to generate the third field?

I have a 220 VAC sanding machine motor, replaced Now starts slow and take time to gradually get to proper speed (around 5-8 sec). Is it the wrong replacement mtor or starting capacitor? Should I increase the capacitance? Appreciate your help.

I have a primeair compressor the cap is a 55uf 360v/250v I ordered a 53-64mfd 250vac start and 53-64 330vac start burnt both must need run caps? what do you have to get me working? thanks Mike k.

Very informative, kind of a shame the audio is bad quality. Gotta watch those clip levels.

So just to clarify, you can replace a start capacitor with a run capacitor if it has sufficient micro-Farads? For example I have a 8uF start capacitor, I can replace it with a 8uF run capacitor?

Replacing a run cap on a bandsaw, the original is a 2 prong and the replacement has the same values but is a 4 pin. If they’re interchangeable does anyone know which pins do I connect to?

I’m confused about you usage of “duty cycle”. I’ve only been exposed to the term regarding a DC square wave signal at a fixed frequency and duty cycle refers to how much of the wave is “high” vs “low”. Never heard it used discussing AC signals. I would appreciate any feedback.

am using a schultz angle grinder, it has two capacitors, now I have a problem with a big capacitor from it which has some drums inside(capacitor with drums inside), what type of capacitor can I repress it and can a capacitors from a capacitors Bosch grinder work in it ????

I have a 240v 3 phase 7.5hp 5.5kw induction motor for a heavy duty mixer and would like to run it on single phase as i do not have 3phase connection at my location. will i be able to convert it to single phase with cap or i wont get the amount speed from the motor?

Hi and thank you for your help. I was going to take the motor apart but thought an easier test. I snipped off one of the cap wires then turned on the small band saw. The motor just hummed so I quickly turned the motor but it would not start. I then reconnected the cap, turned the motor on and it ran. While it was running, I removed the jumper from the cap and the motor slowed down a bit. So I think this is a run cap. Have I diagnosed this correctly? Thank you.

Some of the speed controllers can't be used with a motor with a capacitor. I was wondering if this refers to the start capacitor only?

My AC went out. My intent was to do the electrical checks, but it started out with a dead mouse on top of the capacitor. I cleaned all the debris, then did the checks for the compressor which was fine as was the relay and controller voltage, leaving the capacitor. I couldn't find any shorts on the capacitor but it is the last item to prove out. It did have a bulge on the top. So I ordered it. I get it tomorrow. Question: was it the mouse that may have cause the capacitor to fail?

I have a dual run cap (herm, fan, c) that came off a window ac that I want to repurpose. Are all dual run caps running caps (ie will this thing blow up if I hook it up wrong like a start cap will) ? I want to hook it up in parallel with an ac motor to improve the pf. Do I just use the C and fan terminals or X and fan+herm? The specs of the cap are "7.5/40uf 240vac amc-24h07400b hpf ms 10000afc Sam wha... ". But I'll be darned if I can find anything on Google on it. What would the temco replacement part be?

Both original and replacement run capacitor are same 12.5 MFD 440/370 VAC but new replaced blower motor has 7.5 MFD listed . Still good ? Seems fine , it working

At what temperature do standard motor windings melt?

I am looking for a 45uf+/ 6% 440VAC/B 50/60HZ Capacitor for my air conditioning unit outside. This number matches the one on the bad unit. It developed a pin hole and the oil came out and it doesn't work. Can you set me up with one? I have a pic if you need one.

I have a grizzly dust collector motor wired for 220. Seems the capacitor is bad. Opened it up and it’s a 300mfd, 120VAC capacitor. Am I right that that is the wrong capacitor? Possible that the motor was rewired for 220 and the capacitor was not changed? I got the unit used.

I have a couple carpet blowers that run off and on. Would this be a capacitor problem. They run for ten minutes and stop for five minutes

good info

hi im curious i have a shakey fan blade on my ac unit , i had the motor and the capasitator replaced this morninig and now the AC fan blade shakes the whole unit a smidge, will that kill the motor on the AC fan unit?