Run Capacitor Fundamentals Class

In this quick class we cover run capacitor, fundamentals, how the are rated, how they are tested and how they work.
Read all the tech tips, take the quizzes
and find our handy calculators at www.hvacrschoo...

[@grashoprsmith]

The next generation of techs will be much more ethical and efficient with access to good training like this!

[@bikerbobcat]

Even current techs like me are trying to get better every day.

[@tekjunkie28]

I have yet to find a good tech where I live. Makes me think about changing careers to help people

[@waylonlevins]

@@tekjunkie28 It is a real challenge to find a great technician in the residential field. There are a lot of factors. In coastal Texas for one example, residential techs HVAC can make great money during the hot months of the year, but struggle to get enough hours during the mild winter months. The higher skilled techs tend migrate to the commercial field where the hours are steady year round , the work is less laborious and pay/benefits are typically better.

[@lightskinutah]

Too bad it will just be overshadowed by companies who only wants tech who can sell rather than fix. Only reason who I stay in commercial

[@Attest411]

This is the Golden age of HVAC information and it allows for us geek out on everything.

[@joedc8169]

62 years old. I have been in the HVAC Trade since my early Teens in my Dad's Marine AC Biz. I am now Manager of Technical training for Home Serve USA and found all your Videos to be a great resource. And accurate.

[@jabroski69]

Are yall hiring?

[@phillipgoodlow9914]

Hello, I’m currently in trade school and looking for work. Do you have any opportunities or advice for me?

[@BigPowerAL]

As a long time boiler operator and now moving into my company’s HVAC / electrical group this information is gold! Never stop learning and challenging yourself to master new skills!!!

[@tmst2199]

Although capacitor function is likely not of particular interest to a commercial tech...

[@HVASEA]

For being in the trade for 36 years... I must say you have a great channel and us old dogs still learn something every day.

[@lancomezi]

Thank you HVAC school. Very informative and concise. I'm a homeowner learning the basics. You covered several questions and I'm only 4 minutes into the video.

[@ralphparker]

A meter could check the capacitance by putting a AC test charge on the capacitor and measure the phase shift in the circuit. It could also measure the voltage rise rate and /or decay rate over a resistive circuit. When an ac capacitor is installed on an AC circuit, the voltage of the capacitor is dependent of the current "pumped" into the capacitor, since the voltage would change direction before the current could completely build up the charge it would always lag the source voltage. This lag is really represented by the line resistance. The more line resistance, the more the lag.

[@tmst2199]

Interesting. Thanks for trying to explain.

[@lukegrinder81]

More of these types of videos please Bryan. Great stuff man.

[@robertanderson2118]

The first thing that should have been talked about in this class is how to safely discharge the cap.

[@1pcfred]

Safe for who? The capacitor or the tech?

[@MatthewJamesKent]

Nope. Never got vaxxed nor would I ever

[@thardyryll]

Have a friend whose old man wouldn’t get vaxxed. He died of Covid. Friend is fully vaxxed. Siblings, otherwise known as dumbshits, won’t get vaxxed. The vast majority of people who die of Covid are unvaccinated, but that is far too complicated a concept for antivaxxers to comprehend.

[@aonforme3455]

Great!!! One of the fundamentals of capacitors is understanding they (many types) are rapid discharge devices. Several decades ago in electronics school, it was cool to see the spark when leads were shorted together. Yes, safety first, but we did learn a few pranks/tricks.

[@annafraley5388]

Wow, THIS was the Best CLASS yet…!!! ✅ That was a Good breakdown of the subject at hand 🤚 so far.

[@truthseekerKJV]

I was taught that in a sine wave, the amps lead the volts which means they do not happen at the same time, so they are essentially out of phase. A run capacitor works to put the amps and the volts in phase and this gives a running motor much more torque.

[@artomix7]

Depends on the load, for a purely resistive load the voltage and current waveforms are completely in phase. A motor is a highly inductive load though, which is the case you described.

[@dougaltolan3017]

A run capacitor let's you use a 3 phase delta motor on a single phase supply. You are right that a capacitor will shift the phase. Connect line across 1 winding and the correct value capacitor across another will shift the phase on that winding by 120 degrees. The third winding will "see" the difference of the first 2,and that is the 3rd phase.

[@waynemiles7027]

ELI The ICE man!

[@cleansebob1]

@@dougaltolan3017 Actually, no. The capacitor is sized to shift the start winding current by 90 degrees from the run winding, simulating a 2 phase motor.

[@dougaltolan3017]

@@cleansebob1 Actually yes. A delta wired 3 phase motor can be run from a single phase with a run capacitor. A motor with 2 windings will have a main and an auxiliary. The auxiliary winding is normally thinner guage wire and have fewer turns. Capacitors are used to shift the phase of the auxiliary winding to match the geometry of the layout in the stator. Auxiliary windings have optionally a run capacitor, a start capacitor, or both. If a, start capacitor is used, it is switched out either by a centrifugal switch or a timer.

[@dumpstadee8371]

good teacher ,admitting he don't know everything but that is how he was taught and just passing along his knowledge.

[@pjwoo276]

So far I'm up to 4:20 and I gotta say, my hairs are standing on end. I feel like I just struck gold here. WOW ! ! !

[@jkbrown5496]

There's a channel Ludic Science that has a video 'Making a High Voltage Capacitor' out of 3 disposable plates, a couple pieced of aluminum foil and baby oil. Very good if you need a visual of what makes a capacitor. They just roll something like that up in the can for run caps. Also, his 'Electrical Reactance Demonstration' video is the best for seeing how inductors/windings and capacitors act like resistors in AC series circuits.

[@gama1123]

The meter is actually acting as a very high impedance path, that's why it is slowly discharging. If it were low impedance the cap will discharge rather quickly.

[@enriquet2562]

🎯 🎯🎯

[@fahey6797]

I thought impedance only related to AC current whereas the meter operates in DC and has a high resistance but is nevertheless consuming some current while taking a voltage reading?

[@1pcfred]

@@fahey6797 impedance is whatever opposes the flow of current. Impedance is the combination of resistance and reactance. So impedance changes with frequency. But there's still impedance even with DC. It's just a different impedance. Clear as mud!

[@1pcfred]

What a capacitor does with an induction motor is create another line phase. A capacitor connected to AC makes the voltage lag. This is handy with single phase motors to give you phase angle to develop torque. You're sure not using the capacitor to store a charge while a motor is connected to line voltage. There's plenty of charge on the line all the time.

[@thailaoder]

Thank you for your great video Best instructions ever to learn on line

[@Mikael5732]

I will make only one comment, a board being able to be marked with dry erase marker showing the circuit path is such an advantage teaching students this theory, or any theory is very helpful. I listened to you but wished I was there to clarify by drawing the circuit path to aid in your teaching. Great job in your explanation I must add but adding drawing’s really helps solidify their understanding in theory.

[@dougaltolan3017]

You are mixing start and run capacitors, even though at one point you stated they aren't the same thing. A run capacitor allows a 3 phase delta motor to run from single phase supply. The capacitor is connected across one winding, the line across another. The combined inductance of the winding a d the capacitor phase shift the voltage on that winding by 120 degrees ie a second phase. The 3rd winding is subject to line minus run capacitor winding, which is equal to the equivalent of the 3rd phase. A start capacitor is used in an induction motor that has 1 main winding and an auxiliary. Without the start capacitor it is 50 - 50 which way it will run at each start. The addition of another (smaller) winding and a capacitor means that the motor will always run the same way.

[@subramaniamchandrasekar1397]

You confuse even more. 3 phase motors do not need capacitors to run. Back to basics please.

[@bendirval3612]

This was both informative and entertaining. No interest in becoming an HVAC tech, but I think I'm going to watch all your videos.

[@mrnapolean1]

Don't know why the algrorhythm gave me this video but this channel was a instant subscription for me. Thanks for the content.

[@waynepowell567]

Awesome stuff. Much appreciated. Thanks for sharing this. It is VERY helpful.

[@spelunkerd]

I've heard that standard reasoning, of back EMF from the motor causing higher voltage drop across the upstream capacitor, but I think it's not accurate. It's a confusing topic because there are two kinds of back EMF, the kind of reverse voltage that comes from the motor acting as a generator, and the kind that comes from inductive properties of the coils inside the motor. I think the higher drop across the upstream capacitor comes from the inductive properties, not the generator effects. You can easily model the higher drop across the upstream capacitor with an A/C series LC circuit. At resonant frequency you get huge drops across the cap, since electrons are shifted back and forth between capacitor and inductor like a juggler tossing a ball. That's why it is so important to have the correct run cap in line. The circuit needs to be tuned to resonant frequency. On the other hand, the generator effects of the motor cause a reverse voltage (in phase) which can never exceed incoming voltage. A reverse voltage charging the downstream side of the capacitor would tend to increase voltage on the downstream plate, effectively reducing the drop across the capacitor plates. Unless the generator effects are out of phase, you shouldn't see big voltage drops across the capacitor coming from pure generator effects.

[@PHiLiPPiNESCENES]

*QUESTiON* CAN WE USE A RUN CAPACiTOR iN THE PLACE OF A START CAPACiTOR? ARE THEY iNTERCHANGEABLE?

[@theotrotchie]

Very much appreciated. Learning made interesting.

[@paulb4496]

Great video! Packard Capacitor Training video on KZbin is helpful too.

[@chadholmes7051]

The caps generally have bleed / discharge resistors fitted just as a side note

[@ricknelson947]

Am Rad, built in Palm Coast Florida. I only use them.

[@papaalan1765]

Great video but maybe i missed it, question... I realize it's been 2 years since you did it But... say you had a capacitor that was out of the tolerance by far yet the compressor does start up... is it possible that that out of tolerance capacitor would cause the compressor motor to work harder, leading up to thermal overload protection activating on the compressor after it's been running for a while during the day?

[@joehead1294]

RPM-run/power to the marked side, never seen one. Understand the marked side terminal is the plate closest to the housing and would short to the can and kick the breaker.

[@mrkattm]

Volt meters are high impedance devices, like in the mega ohms. Current meters are low impedance.

[@billarroo1]

Great information. Thanks

[@clarkkent7821]

Pretty good learning experiment I done worked on heating and air conditioning for over 20 some year I've had my experience with some capacitors the worst I ever had was start capacitor I've had them blow the electric box completely up they're dangerous you ought to teach them about them things . They act like a half a stick of dynamite when they go off got to teach them how to wire them up.

[@ronliebermann]

You are correct. In fact, these big capacitors should be labeled as dangerous. They explode, and also the current can kill you. Far too many inexperienced guys screw around with these things, without understanding the risk.

[@mygarden365]

I like Your class.

[@bigbread9000000]

you can safely do that last a.c. experiment using a low voltage on the secondary of a transformer!

[@HectorVela-d8c]

I need some assistance concerning a capacitor. I am replacing a capacitor that reads 370/440. My replacement capacitor reads 370 VAC. Can I use it. The other question: if only 240 volts are going in why is it use for a max of 440 volts. Finally, a capacitor test is in mfd. so why is voltage a concern or a measurement for a capacitor. Thanks for your support.

[@Rick-tb4so]

Great video..

[@anastobchy1672]

It's very simple explanation easy to understand thanks alot

[@maestroelectriko]

Very nice presentation.... Very clear explanation

[@paulb4496]

In a microwave oven a capacitor and a diode is a voltage doubler circuit. The 2000 volts becomes 4000 volts...technically you are right the capacitor itself doesn't boost voltage. But in a circuit with a diode it can double it.

[@magnodvd1971]

Awesome! I’m a hvac technician now.

[@CKILBY-zu7fq]

Ok. Cool video

[@timothyneville7036]

Great video! Was going to reference it in my classes until your mask comment. Very sad

[@PhuketMyMac]

and get va...nated also! Who are you?! A doctor?! Come on people! Keep this things to yourself! The electric part was great howerver!

[@juancarlos-mj6kq]

😂 Holy SHIT totally agreed. Great video until they totally killed it at the end with that mask/vaccinated BS at the end. I subscribed but I’m literally hitting the unsubscribe because I’m totally against this BS and especially when they’re brainwashing the students. They sounded like robots when they all said “get vaccinated” 😂

[@billdennis2993]

Thx HVAC S for an informative and interesting video brought back memories of '70s Mt Sac College and Mr Motter's Aviation electronics class driving home Xl and Xc calculations to match capacitance to reactance to improve delivered power factor in a motor. Now days a Micro Aire soft starter does it all for me on my RV ACs allowing me to run 2 ACs from 30amp 120vac shore power. Sub'd

[@Skarkroe]

In the case a capacitor has common, herm and fan, but fan is not connected on a fully functional condenser unit, what information about the fan can be assumed? Does the fan simply not require a capacitor? 1:38

[@billdroese5808]

Hello I have a120volt 1hp motor single phase do I need a capacitor to transfer power from house current to generator so the motor doesn't stop using a 4000 watt electric generator Thanks bill

[@deoranferguson5657]

Really wish I work here man so much knowledge

[@busdriver9007]

I have a coleman RV ac on the compresser start capacitor with a resistor in the one wire it is bad as well,, my question is do I need the resistor OR can I do away with it ??

[@tmst2199]

It's still not clear to me why the capacitor is wired the way it is. Does it connect to L1 or neutral?

[@frankmontez6853]

I can't get to coils to check / clean unless I take it apart even more quite extensively than I have so far and so I guess I'm going to try replacing blower motor capacitor . Coils sitting on top of furnace and I would have to cut freon and drain lines . Yes it might be very dirty but don't wnat to go further and capacitor is only $12 . That might work ?

[@khw71471]

Oh no! What happened with the 120v experiment?

[@BharatiyaInfotech]

Lots of thanks sir Your videos are really good and helped

[@hellorhighwater5342]

Can I use a 10+5% in place of 7.5+5% for my indoor blower motor. Just for a day.

[@RetiredSignDude]

ThankYou

[@Discretesignals]

Wouldn't just rely on measuring capacitance to tell if an electrolytic capacitor is good or not.

[@kiltlifter3988]

I've got a new 25mfd AmRad cap, it has a black and a white terminal, no other markings, which would be common? Or does it matter?

[@Trust_Jesus]

You need to a video within the next week before my final exam lol!!! A video on how the electrical is hooked up on a wooden simulator board thing in our classroom showing the wiring from the the thermostat to the transformer, contactor, heat relay, indoor fan relay, compressor, electric heat, indoor fan and outdoor fan!! I bet you $100 bucks you can't make this electrical video with a week!! Really lol 🤷‍♂️

[@Trust_Jesus]

There is no capacitors on this board simulator thing...

[@Trust_Jesus]

Lol I I can follow the schematic its just.. well idk what it is!! For some reason I am just having the hardest time time with this!! I believe I am just making it more complicated than what it really is!! Its like where to plug in the wires on a contactor and where to plug in the wires on the relays??

[@anom2789]

@@Trust_Jesus you have to think about what loads connect to what switch. where is the line voltage going on a contactor. what tstat wire connects to each switch. contactor Y relay G sequencer W. where is the common going from the step down transformer ( to the 24 volt coils) and you have your R power wire going to the tstat block

[@Trust_Jesus]

@@anom2789 yea.. I'm just making it harder than what it really is!! I got the colored tstat wires down to which switch it goes to and I know where the 24 volt transformer wires go but its like i start getting everything messed up with all the common wires and the load side!! Smh... I just need to take one step at time and slow down!! I think I really am just making it harder than what it is lol

[@Trust_Jesus]

@@anom2789 it just looks like a big jumble of wires when my teacher does it lol... I need to just slow down and connect one wire at a time!! I've been struggling with this for 2 weeks and the final is next week 😫!! I'm in class for 5 hours tomorrow so all focus is gonna be on that lol!!

[@jesseruiz2337]

I bet the one guy at the end regrets saying "get vaccinated"😅

[@claytoncoolidge992]

Lol in electrical class in college I was the guy in the back who would take the little capacitors from our little electrical circuit builder kit and get everyone to pas thier 9v batteries to me connect them in series and then Hook the cap to the battery bank as the instructor was talking and suddenly hear a sizzle a bit of smoke and bang the cap pops and launches pieces of itself and obviously everyone is now looking at me as I laugh my ass off

[@condor5635]

Great video!!! I looked in a condenser unit and it had a dual cap with a 60 MFD herm. Looking on repair clinic the model showed it should use a 30 MFD. The 60 MFD was out of spec but must have been in this unit for years. Should I replace with the 30 MFD? I did not look on the compressor unit itself but need to do that too to see if the MFD is noted on the compressor. Trane model TTD760B100A2. Thanks!!

[@dougaltolan3017]

It is very important to use the correct value capacitor. It is matched to the motor windings and line frequency. A run capacitor let's a 3 phase motor run from a single phase supply by phase shifting the voltage on one of the windings. The wrong value capacitor will create the wrong phase shift. The result is a motor that will not be able to reach rated power and will get a bit hotter. If the motor is sufficiently over spec and there are no cooling issues then yeah you can get away with it for years. But it will run better and more economically if the right cap is fitted.

[@condor5635]

@@dougaltolan3017 - after doing some further digging I realized that the 60 was replacing the original two 30 µF capacitor‘s. So two 30s equals 60 so all is good

[@RoyalCoatTX]

Love it.

[@bikerbobcat]

Me: Your capacitor failed. Needs replaced. Customer: BUT I JUST REPLACED IT 6 YEARS AGO. THEY DON"T MAKE THEM LIKE THEY USED TO! RAAAWWRRR! Me: You're right, they don't! It's cheaper, thinner materials so they fail faster. Your system is failing now. Starting with the capacitor. Customer: GET OUT!

[@MichaelMantion]

HUH... first its heat that causes them to fail. There are tons of quality capacitors that are cheap. you can make a great capacitor with thin material if you do it right. Also why would a customer tell you to get out if a capacitor failed and either the system is down? I think most people assume nothing last for ever and a cheap $10 capacitor plus a reasonable labor free is a small price to pay for a working HVAC system. Now if you are over charging them say $50 for the capacitor and $100 for the service then yes, get out.

[@toma5153]

@@MichaelMantion Michael, that's the problem with some companies. I had a tech out to troubleshoot and repair a short in the outside 24V control wiring. Job well done. He was good enough to point out the start capacitor was leaking and quoted a price of $250 for parts and labor, with about one week to order parts. I never called back. Ordered the cap and start relay for about $40 and fixed it myself in about 10 minutes. Fortunately I know the ins and outs of de-energizing the system and capacitor. Most homeowners wouldn't know they're getting scammed and wouldn't be aware of important safety issues for a DIY repair.

[@ralphcrawford9741]

At season start, my A/C wouldn't work. Thought it was continuation of last season's freon leak but with pressure test OK figured "hey, I'm an electrician," let's take some voltage measurements. Verified power, and contactor was "pulling in" but no output voltage to the compressor. Huh? So, first step in troubleshooting, open things up and look for something obvious. Ants! Dead ones, on the contacts with high body resistance. After a short memorial for the ants, I reassembled the main contactor and she started right up. What do you suppose the commercial A/C tech would have sold me, and how much would labor have cost for installing it? Same ant problem caused my kitchen GFCI outlet to trip and not reset, and a smoke detector to "false alarm," on other occasions. What meter setting do you use to measure the electrical properties of an ant?😉

[@jaydelrosario8119]

HVAC ACTIVES WHEN ON FUNCTION...DC HVLC CAP CHARGE PUSHED PULLED...AC FULL PUSHED HALV NEUTRAL GROUND .PN-.PS+ PAIRS STAGES UPERS UNDER LINESTLE KLINEUP

[@ocdtechtalk]

I'm not positive you are correct about the capacitor charging and discharging based on the supplied electrical frequency. I'm pretty sure once charged they stay charged until that charge is used. I can't think of anything in the motor circuit that would discharge the capacitor. In my understanding a start capacity is used to smooth and supply a constant voltage to the motor, and to absorb the start in rush current. I'm open to be informed otherwise.

[@saintsgun588]

I wish fieldpiece meters would display OL. I don't have one. I've been using a UEI. But that's a little petty thing I don't like lol

[@dickgrayson5049]

They do, just a different field piece model that he is using. Mine shows 0L

[@SteveWrightNZ]

No mention of the 90 degree phase shift between the two windings needed during starting - to provide a rotating magnetic field. Come on guys, know your stuff. Three phase already has a rotating magnetic field, single phase does not - so they use a capacitor to briefly provide a pulse of out-of-phase magnetic torque to start it. After the motor is running, the additional 90 degree field is not required, so the start relay disconnects it. Current in a capacitor is 90 degrees out of phase to the voltage, and since the magnetic windings are current devices, it all works. Think of it like a one cylinder steam engine compared to a two cylinder steam engine with the cylinders mounted at 90 degrees - one engine is self starting, the other is not.

[@esoterex]

Exactly my observation as well. As a Electronic Engineer and also a Physicist I understand Capacitors very well. The single phase motor needs temporary assistance to start running as the single phase can not provide the rotating magnetic filed required. Exactly as Steve Wright has pointed out. I found the 'lecture' very confusing.

[@alpena2835]

He has more in depth videos that explain motors and capacitors. This is just a quick and easy to understand instruction on testing capacitors. Not everyone has the time to learn electrical/electronic theory through KZbin.

[@1shagg420]

Not wearing a mask or getting vaccinated. Thumbs down for every video now.

[@juancarlos-mj6kq]

Yup! I literally subscribed towards the middle because I’m in HVAC technical college in Florida so thought it was a great video until the end where they F’ed it all up…”Unsubscribed”

[@morejelloplease]

rumor has it they're still putting out the fire from that off-camera test

[@niknasstie]

Does it matter at all if you replace a 30 uf with say a 50 uf?

[@Damon0mania]

Now try explaining how a mask works to that ol' dude. I'd love to see that tutorial.

[@MrLibertyFighter]

because masks actually do something, get outta here

[@chanceralls5912]

Schools were forced to wear them

[@defritzel]

So there are people working on and replacing caps that have no idea what they are doing??

[@antidecepticon]

question: If a cap is fed AC120V and unplugged , then measured would the maximum voltage read be < 60V? since is the difference between the Hot and Neutral. will only be charged up by half of current as it alternates?

[@antidecepticon]

or would that only be true on a 240V line?

[@Dark_Knight_USA]

U say a cap cannot self charge. Technically true however in a real world they can accumulate a charge. As a rule 1 should always soft discharge a cap prior handling, testing and installing.

[@baitcasterdisaster8981]

Where can I get the alligator clip meter leads that you guys were using in the video? I don’t care for the ones that came with my Fieldpiece meter so I bought some Amprobe alligator clips which look similar to the ones in the video but much larger. And by much larger I mean way too large. I like the ones in the video, they look like just the right size for me

[@jackrichards1863]

Compressor, it's not working. Capacitor must be shagged. Buy new capacitor. Install. Compressor motor still does not run? Checked cap with circuit tester on 200nF.= 0.4 ! Test on 20uF. Display reads same as before testing 0.03 ~0.04 . Is this the wrong tool to test with?

[@countryside8122]

Can these also be checked with a capacitor tester, The sane kind used in electronics?

[@garyr7027]

Yes so long as the tester is designed to read the scale the cap runs at. Most all testers will, as these caps are at low capacitance. In electronic circuits, capacitance can get higher in scale, which might require a tester design for high capacitance. Generally, just about any tester will read these caps. If you want a tester to read higher scales, like for electronic circuits, it might require a different tester, depending on the scale design of the tester. Farads, micro farads, pico farads and nano farads all are on different scales. It would take a real good tester to test all those scales, be an expensive unit which most people won't even need.

[@robyounce4636]

370V at 50hz....440 at 60HZ

[@n.gineer8102]

The capacitor just creates a phase angle between the start winding and run winding to create a torque to start the motor. Too small a cap and the start winding is weak and not enough torque. Too big a cap and it starts but there’s too much current in the start winding wasting power and making the motor run hot. There’s no energy storage required, that’s just a side effect of the cap design.

[@james77011]

Very nice video ❤️♥️

[@antoniolaracuente437]

Nice

[@MichaelMantion]

Why are you wearing face diapers?

[@fredsalter1915]

Great video! Question: Should you always discharge the cap before you perform the capacitance measurement? Thanks!!

[@tonyfoxxbuilds1920]

Can you use a higher rated capacitor. Something is 220v and then use a 370/440 rated capacitor?

[@dougaltolan3017]

The voltage rating on capacitors is a maximum limit. Exceed it and the cap goes boom. Provided you don't exceed the rating then the cap will be fine.

[@enedinocristobal7288]

This is the same question i have. Mine is 250 v and 60uf but i cannot find anything in 250v i guess i can ise 370. Well i hope i can lol

[@NSilver832]

Does a motor still run if the run capacitor is bad? Or still runs but doesn't run as it supposed to? Please help.

[@dougaltolan3017]

If the capacitor is removed or completely broken the motor will not run. If the capacitor is degraded as talked about with the foil peeling off then the motor wi run but badly, get hotter and less efficiently. This is only for a run capacitor, not a start capacitor.

[@NSilver832]

​@@dougaltolan3017. Thank you. I don't know why KZbin never sent a notification about your answer. I just found it today because i watched this video again.

[@siddharthgargi3625]

Good teacher

[@piscitellinicholas5240]

Don't overcomplicate the capacitor if it's faulty you change it with a new one and be done with it,

[@GrizzlieMan]

You should be teaching how to use the formula by using an amp draw. Not by touching your leads to the capacitor.

[@joesmith4222]

I have a couple of these hooked up to my doorknobs I switch on at night. They work quite well.😳 ⚡

[@tomorrowsyoutube7138]

Where do I get those multimeter leads?

[@subramaniamchandrasekar1397]

All use standard 4 mm banana plugs. RS components, any fluke meter supplier or ebay should do.

[@blazebott]

like button broke

[@ivanmadrigal1395]

HEY guys you talking to fast please try talking a little bit slowly BTW your videos are fantastic

[@leroysmith6676]

No mask at home, that is silly

[@juancarlos-mj6kq]

It’s funny that I stumbled up your reply 😂 because I truly was enjoying this video as I’m currently in a technical college studying HVAC. But when they did that at the end of the class “wear your masks at home” and students all followed up with “get vaccinated” that totally ruined it for me. This teacher is clearly good, but it’s obvious he’s also brainwashing his students to wear masks and get vaccinated. That’s messed up. Masks DON’T work against anything it’s been proven. And as for vaccinations, I don’t do vaccines EVER. But that’s me.

[@beaverdamservices]

Wear your mask at home?? Lol are you in fauci's Pocket?

[@HVACS]

Hahaha... no we are teaching in a public school that requires it Try to focus on content rather than being a loser troll

[@dan827]

He's not being a troll. That literally was part of the content you put out.... that's the only beef I had with your video. 'Wear your masks!' 'Get vaccinated!' How about....STFU?

[@juancarlos-mj6kq]

@@HVACS Correction you’re brainwashing your students. It’s a WOKE school. Very sad.

[@mifi5913]

I’ll pass on the blood cot cocktail………

[@kevinsellsit5584]

I beg to differ. You said the insulator is foiled on both sides, rolled up, and the foils never touch. You said one connects from the bottom, and the outside connects at the top. Wrong. There is only foil on one side of the insulator. If it were on both sides it would touch. If it cant touch it is only on one side OR it has a second insulator rolled into it. Look at any roll of foil, the shiny side rolls onto the dull side. The stored capacity is from one end of the foil to the other end which is several meters of foil away. You need to cut one up.

[@myplanet61112]

Nico information

[@bobby1970]

Aren't those things dangerous?

[@mjshuja1948]

I am EXPERT MYSELF,I LIVE ALL MY LIFE UNITED STATE I AM FROM PAKISTAN,WHY 3PHASE MOTER DOES NOT HAVE CAPACITORS 😱😱😱😱😱👍👍👍👊👊👊✌️✌️✌️✌️

[@tomallen6073]

Never explained what run capacitor does.