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Corroded start and run capactors on an Air handler (C) InspectAPedia.com JonMotor Capacitor Selection FAQs-2

Q&A on how to buy the right electric motor start/run capacitor

  • POST a QUESTION or COMMENT about installing a hard-start capacitor to get an air conditioner motor, fan motor, or other electric motor running.

Questions & answers on how to choose the right replacement motor start or run capacitor.

This article series explains how to choose & buy an electric motor start capacitor, hard start capacitor, or run capacitor that is properly rated for and matches the requirements of the electric motor such as an AC compressor motor or fan motor where the capacitor is to be installed.

InspectAPedia tolerates no conflicts of interest. We have no relationship with advertisers, products, or services discussed at this website.

- Daniel Friedman, Publisher/Editor/Author - See WHO ARE WE?

FAQs About Motor Starting Capacitor or Run Capacitor Replacement

Recently-asked questions & answers about how to select the proper start or run motor capacitor posted originally

at CAPACITOR SIZE DETERMINATION for ELECTRIC MOTORS - be sure to review that article.

Article Contents

...

 

Other Electric Motor Start / Run Capacitor FAQs

How do I distinguish a start from a run capacitor

How can you tell if is a start or run capacitor? On 2015-07-09 by Desi

by (mod) - check the capacitor MFD range

Desi,

To distinguish a start from a run capacitor look at its microfarad ratings.

Quoting from CAPACITOR SIZE DETERMINATION for ELECTRIC MOTORS

Run capacitors typically range in micro-farads from 1.5 to 50uf.

Start capacitors typically range from 20-30 uf up to 250-300 uf. A MUCH bigger zap.

Keep in mind that one physical capacitor might serve both start and run circuits through different terminals on the device.

 

How do I read the markings on this capacitor?

Run capacitor, rated at 7.5 microfarads (C) InspectApedia.com Robert

Looking to replace my capacitors but still cant seem to figure it out. Can you provide me help or links to replace these capacitors.

Here is my other capacitor\

Round starting capacitor 35 microfarads (C) InspectApedia.com Robert

On 2018-07-10 by Robert

by (mod) - how to read the numbers marked on a start or run capacitor

Robert

On the round capacitor I think I see 35+5 uF 440V - that'd be the cap rating.

The 5 is probably meant to read 5% - the accuracy or tolerance of the device around 30uf = or 30 microfarads.

Of course you'll need to match the terminals to get the right cap type. This is a starting capacitor from - what? Tell me the equipment.

[Click to enlarge any image]

On the oval capacitor shown below, I see 7.5uF +/1 5% and is nicely marked as "run capacitor".

Let me know if questions remain.

 

I Don't Understand How to Choose the Right Capacitor

Yuhchang 30uf 250VAC motor start capacitor (C) Inspectapedia.com SPI have a Wayne 1 HP motor used as a utility pump. The capacitor burnt out. It is a rectangle plastic capacitor with two wires coming off of it.

The numbers on it are: 30 F /J/250VAC I don’t see a U before the F there are two symbols that look like arrows pointing to the right before the F letter.

There is a name on it that says YUHCHANG ( P )

I read you article on how to choose a capacitor still it’s all Greek to me. So what am I looking for?

Thanks for your time, - Anonymous by private email 2016/06/19

Reply: How to Choose the Correct Capacitor: four options

Anon: in response to your query I've re-written our capacitor selection explanation.

Four ways to find a matching or replacement motor capacitor are given at CAPACITOR SELECTION TIPS in this article.

Also if you can, send me some sharp photos of the cap and its markings and I may be able to comment further. Post a photo of your existing motor capacitor and its markings at the page bottom comments box, or use the page top or bottom CONTACT link.

Reader follow-up:

Here (shown above) is a photo of the capacitor I'm talking about.

OK so we know this is probably just a single-purpose motor-start capacitor, since starting capacitors are most-often 125, 165, 250 and 330 volt devices while run capacitors are rated for higher levels like 370 and 440 volts. If it were a dual-purpose capacitor you'd see 3 rather than just 2 terminals.

You'll have no trouble buying a replacement at your local electrical supplier or even from an online supplier. Prices for a motor capacitor start at under $10. U.S.

Ask for a 30 microfarad 250VAC motor start capacitor. Take along the old sick one to show your supplier.

At MOTOR CAPACITOR WIRING GUIDE we show how to hook up a typical capacitor.

Watch out: Keep me posted on how you do, and work with POWER OFF so you live to tell me.

Reading the Capacitor Sizing Chart How do I go Between KW and Horsepower, HP, or BHP (British Horsepower)?

Hi i saw in the web site that my fridge compressor is 1/9hp but in your chart is in KW

How do i know the right cap based on the list given at CAPACITOR SIZE DETERMINATION for ELECTRIC MOTORS ? On 2021-09-26 by Steven

by (mod)

@Steven,

In general,

1 horsepower = 746 Watts

or more accuratelhy,

1 bhp - 0.745699872 kW.

So to convert your 1/9 HP motor to watts:

(766 / 9) = 83 Watts

British Imperial System: one horsepower (hp) equals 33,000 foot-pounds of work per minute—that is, the power necessary to lift a total mass of 33,000 pounds one foot in one minute.

Watch out: However, BHP (British Horse Power) and "Horsepower" are not necessarily identical.

And even the acronym "BHP" has more than one definition: "British Horsepower - BHP " and "braking horsepower - bhp"

Adding to confusion is the term "Boiler Horsepower" and also Metric horsepower.

In the UK people use "brake horsepower" to measure the horsepower of a vehicle or its engine, expressed as bhp. Brake horsepower or "braking horsepower" is the most common measurement of engine power.

HP or "horsepower" of an engine will be slightly higher than bhp because hp doesn't take into account the frictional losses within an engine.

Wheel horsepower or WHP takes into account additional losses in the drivetrain in delivering power to turn the wheels of a vehicle and thus to move it on the road surface.

 

Distributor says the order of numbers on the capacitor doesn't matter

I'm replacing the capacitor in my AC condenser. The original/stock unit says 35/5 440 AC. This is the cap I ordered from a distributor, but upon receiving it, the box says "5/35 440" (the 5 and 35 are transposed. Distributor says its the same thing. Is this correct? Thanks for any 411 6/16/2014 Danno 

Reply:

Danno I think the scrambled order is not an issue as long as the key numbers on the capacitor match its application or match the old one AND as long as you connect the proper wires.

Example start/run capacitor markings

(NOT specifying your particular capacitor)

  • Voltage, e.g. 110-125V
  • Capacitance, e.g. 189-227 µF or micro Farads or MFD (Start capacitors usually are over 60 µF)
  • Capacitance, e.g. for a dual run capacitor: 35/5 refers to 35 MFD (for a compressor) and 5 MFD (for a fan motor)
  • Temperature range, e.g. -40 - + 65C
    • Cycles, e.g. 50-60 Hz

Decode a 35/5/440 marking on a motor starting capacitor

Reader Mark (18 June 2014) has given us a helpful and detailed translation of the markings found on start capacitors, repeated here:

Run capacitors: I always was taught that 35/5 was a [dual] run capacitor. 35 is the microfarad rating for the compressor & 5 microfarad was for the fan. (three terminals) not:

Decode a 35/5/440 marking on a motor starting capacitor:

The capacitor you are describing marked 35/5 440 is probably a dual run capacitor.

35/5 : The first two numbers are the capacitance 35 µF (for the compressor) and 5 µF (for the fan motor).

A dual "run capacitor" supports two electric motors, such as in large air conditioner or heat pump units, with both a fan motor and a compressor motor.

It saves space by combining two physical capacitors into one case. The dual capacitor has 3 terminals labeled

"C",

"FAN", and

"HERM", which stand for the Common, Fan, and HERMetically sealed compressor.[5]

440 refers to the ability to run voltages up to 440VAC

Dual run capacitors come in a variety of sizes, depending on the capacitance (µF), such as 40 plus 5 µF, and also the voltage. (Be sure to connect properly to compressor motor, fan motor and common)

A 440 volt capacitor can be used in place of a 370 volt, but not a 370 in place of a 440 volt.[2]

The capacitance must stay the same within 5% of its original value.[2]

Round cylinder-shaped dual run capacitors are commonly used for air conditioning, to help in the starting of the compressor and the condenser fan motor.[2]

An oval dual run capacitor could be used instead of a round capacitor, but the mounting strap should be changed to better fit the oval shape

Watch out: Take a look at the wiring sheet that should be with your capacitor or wiring marked on the device itself to be sure that you are properly connecting the Start and Run wires and you'll be OK.

As we noted in the article above, the dual capacitor terminals may be labeled so that the three leads can be wired correctly:

  • S = start wire connector
  • R = Run wire connector
  • C = common connector


Start capacitor EBB60 10uF 450v keeps blowing

I have a cheap-make macerator where the motor has a start capacitor type EBB60 which is 10uF 450v. It got jammed with a tampon and blew the capacitor (loud humming noise), which I replaced with an EBB60 bought from Ebay. This worked fine for a month, then went again.

Bought a similar one from same source which worked twice (i.e two flushes) followed by a loud humming. Could it be a bad batch from Ebay?

The caps cost £6, and I notice Saniflo sell one for around £25.

Would a better quality capacitor - assuming the more expensive one IS better quality - work? On 2019-09-30 by RonDobson -

by (mod) - be sure you're choosing the right motor starting capacitor

Starting capacitor for a small pump or macerator (C) Inspectapedia.comDon,

Here are specs for a small electric motor starting capacitor - this one sold by repairclinic.com

This is a 250 uF starting cap good up to 250VAC 50/60 Hz - your macerator pump motor may need a higher capacity or voltage unit than this;

Have you checked the data tags or capacitor specifications in the manual for your macerator (sewage grinder pump) ?

I don't have authoritative data on capacitor defect occurrence rate for new caps such as you described.

But something doesn't smell right in your capacitor selection.

You say it's an electric motor STARTING CAPACITOR RATED AT JUST 10uF [and 450v) but 10uF is awfully low for a motor starting capacitor.

For example over at Grainger - one of the biggest suppliers - their electric motor starting capacitor guide doesn't even go that low.

You are describing a motor in a macerator - perhaps what is also called a sewage grinder pump? - if so, again I'm doubtful about that capacitor selection.

Over at Grainger.com you'll see that a Dayton brand 10uF 450VAC capacitor sells for under $10. in the U.S. - under £10 - AND that such caps in that range are labeled as motor RUN capacitors NOT as start capacitors.

IF your start cap was not properly sized that could explain why it keeps blowing. Is it possible that the labeling on the original motor start cap was blurred or damaged or mis-read?

Below is a 250 uF starting cap good up to 250VAC 50/60 Hz - your macerator pump motor may need a higher capacity or voltage unit than this;

Have you checked the data tags or capacitor specifications in the manual for your macerator (sewage grinder pump) ?


motor start capacitor at Inspectapedia.com motor start capacitor at Inspectapedia.com

In sum, for various types of pumps and motors of similar sizes such as residential macerators or smaller sewage grinder pumps a typical motor capacitor set might be

Start Capacitor # 005290115; Start Cap Rating 233-280 MFD, 220V

Run Capacitor # 122670021; Run Cap Rating 15 MFD, 370V

Watch out: Be sure to see the electric motor capacitor selection tables given in

  1. The data tag on the electric motor itself
  2. The manual for your specific motor or appliance
  3. or for a general guide CAPACITOR SIZE DETERMINATION for ELECTRIC MOTORS

Startup capacitor is beginning to fail

Starting cap for well pump, 45uf 350VAC replacement (C) InspectApedia.com OrgI have a 1hp water well jet pump (115vac, 11 amp) with a startup capacitor that is beginning to fail. Its 10 months old with a one year warranty, I'm sure it the capacitor because the motor struggles to startup after cut-out and will struggle to restart.

So far it will eventually restart and runs well when it does restart but the condition is getting worse.

I was told by the supplier I can return and exchange the whole unit, a major undertaking. I was thinking that I could replace the capacitor and that would resolve the problem.

I've included an image of the capacitor markings and would like your input on finding a replacement.

The unit was made in China for Tractor Supply Company. Anything else you could tell me would be appreciated. Thanks. On 2019-01-18 by organizome49 -

by (mod) - try replacing the start capacitor before replacing the entire well pump

Org

The cost to try a new capacitor is trivial so sure go ahead and try it.

However if the underlying problem is a failing pump motor, a new starting capacitor will give but short term relief. So be sure you can exchange the pump within warranty period if needed.

Before replacing the motdor capacitor you have shown, why not test it to see if the problem is there or elsewhere.

See TEST a MOTOR START or RUN CAPACITOR for details.

Watch out: if you are not trained in safe electrical wiring and work you could be shocked or killed.

 

 

Old Motor Data Tag Example: Chicago Industrial Tool Co. - Taiwan

Old bench grinder motor (C) InspectApedia.com CWHONKAHII have a hand me down 125 vac, 1/2 hp bench grinder. It had a Jerry rigged replaced 100mF start capacitor that wasn’t a replacement of original.

I replaced it with a new 100mF but it went out after a few starts. Looking at your charts I see the motors are rated in kw not hp.

Doing the math I come up with .367 kw.

So I am assuming that I need a start capacitor in the 320 - 400mF range? Thanks for the great site. On 2018-01-22 by CWHONKAHI -

What is the typical capacitor uf rating for an A/C compressor

Hello there

I just found 2 refrigerator compressor motors without any mark or data tag, without wires or capacitors.

I already checked all 3 leads to identify which is run, start and common and test it and both still working great.

But now am having problem to choose which capacitor to use for each of it.

Here are the details I found on both compressors

1: Hitachi FL1152-SE
220-240V 50Hz
HFC-134a B6
Made by Hitachi
Its for Hitachi Refrigerator On 2017-04-15 by Azmil


2: Model DA57C11RAY5 (on top it shows DA57C11RAY51202b7)
220-240v 50Hz
1PH R134a

I plan to use and turn both unit as Air Compressor.
Made by Matsulovea Electric Ind. Co. Ltd
Its for Panasonic Refrigerator

Reply by (mod)

Azmil,

From a quick peek at some Hitachi catalogs finding models in the range of your Hitachi FL1152-SE compressor motor I see that it's probably a 1/6 hp. motor - in the 100 - 120 Watts range.

Take that to the table 2 in CAPACITOR SIZE DETERMINATION for ELECTRIC MOTORS and I see a 30/40 uf capacitor - something to check also with your electrical supplier.

I no success finding your Matsulovea Electric - compressor motor - Panasonic keep showing up as search results, in the 250W range -

 

Hard starting Disk Sander Capacitor Troubleshooting

i have a 20" disk sander very hard start load i know for a fact it spikes to a 100a draw at start. its a 220v single phase 1750rpm, 1.5HP 10 amp, kw1.1. i been blowing start capacitors. i have no idea what start capacitor came with it the # where not readable.

what it does randomly is: start then makes a lot of noise sounds and vibrates. i turn it off when it does this. normally it will make a click noise after its up to speed.

im guessing this is when the start cap takes over. i have tried so far a 270-324 iuf and 415-500 iuf both worked for a bit then blew, both would randomly not disengage after it was up to speed. i changed the run cap too. On 2015-06-12 by mark

by (mod)

Mark

It sounds as if the problem is more than a bad start capacitor - perhaps a binding or shorting electric motor. Check the bearings for free movement and then test the motor for shorting windings.

Looking for a Capacitor for & Information about a Doerr Electric Motor

Doerr 1HP LR22132 air compressor (C) InspectApedia.com Curtis P

Missing cap.
Doerr 1 hp 60hz
FR - J56
115 lo volts 17.6 FLA /AMPS
3450 rpm air compressor.
Single ph. LR22132 type k
OTHER #s (M06026 ) MTR.R.REF -(R604933CF813 ) :)?
Ser fact. 1.0
Duty - cont.

On 2022-06-10 by Curtis Pieratt

Reply by InspectApedia-911 (mod) - All you need to know is on that Doerr Electric Motor Data Tag

@Curtis Pieratt,

OK so on that Doerr 1HP motor you have the data you need to follow the generic start/run capacitor selection guidelines above on this page.

Doerr Motors was a brand owned by Grainger, an electrical supplier, so you could also call Grainger directly, giving the model number Doerr Model No. LR22132 to ask for help choosing the capacitor that you need.

Grainger: Website: https://www.grainger.com/
Customer service: 1 (800) 472-4643

For other readers, here's a

History of Doerr Electric Motors.

Doerr Electric Motors was founded in the U.S. in the very early 1940s, originally using the name Electro Machine Corporation, in Sturgeon Bay, WI, Cedarburg WI, and Burr Oaks, MI. Doerr was acquired by W. W. Grainger, Inc., July, 1969.

These motors were used on various equipment including air compressors and other metal machine and woodworking machine tools including some sold under the Delta brand.

Grainger sold its Doerr line to Emerseon Electric who sold Doerr on to NIDEC. Some older Doerr electric motor manuals might also be found at Leeson's website, leeson.com.

Current (2022) contact for Nidec is given below but we note that the company's website doesn't even mention the Doerr motor brand directly, referring readers to U.S. Motors. .

  • Contact: Nidec Motor Corporation Headquarters, 8050 West Florissant Avenue, St. Louis, MO 63136 USA, Tel: 1-888-637-7333 Web: https://acim.nidec.com/motors/contact-information
  • Contact: Leeson Electric Motors, Web: https://www.regalrexnord.com/brands/leeson

    Regal Rexnord Australia 19 Corporate Avenue Rowville, Victoria, Australia 3178 Phone: +(61) 3 9237 4040

    Regal Rexnord Canada 320 Superior Boulevard Mississauga, Ontario, Canada L5T 2N7 Phone: 1-905-670-4770 Fax: 1-905-670-8971

    United States Customer Service: 1-833-734-2500 Regal Rexnord Corporation 200 State Street - Beloit, WI 53511 Phone: (608) 364-8800 Fax: (608) 364-8816;

I can't find the Capacitor Listed on this micro-motor Data Tag

I have exhausted all avenues to find this capacitor please help!

On 2022-04-01 by Ian Breeze

by Inspectapedia Com Moderator

@Ian Breeze,

At CAPACITOR SIZE DETERMINATION for ELECTRIC MOTORS we explain that a replacement capacitor for your motor will be acceptable as long as it's within 10% of the original motor data. You don't have to match the exact UF nor the manufacturer or brand.


My Century electric motor keeps blowing the fuse

I am having trouble running my 230v motor off a 50amp generator. There is nothing wrong but the in rush keeps popping the fuse. When I bought the knife sharpening machine it was hard wired into the garage and worked great. My friend that’s an electrician said it’s pulling 90amp for the start up, single phase.

I attached a picture of the plate and I and wondering if I can add a start capacitor and maybe also a run capacitor but I have no idea which ones to buy and the century factory is trying to sell me a new motor for 2000 dollars. Please anyone who can help?

Centulry motor (C) InspectApedia.com Tom

On 2022-02-08 by Tom


8 by Inspectapedia Com Moderator - is it a capacitor or the motor failure?

@Tom,

By its data tag, your motor, when running, draws 34 Amps. It will draw higher amps for a moment during motor start-up.

A 50A generator should have not trouble powering that motor provided that the wire lengths between motor and generator are not so long as to cause a significant voltage drop and provided that the generator isn't also being asked to power many other devices at the same time.

Therefore I suspect that the underlying problem is

- a bad starting capacitor for the motor (try replacing it)

or - more-likely -

- a motor or motor-bearing failure that is causing the motor to draw abnormally high current.

 

How do I find the UF for the capacitor for my Esko air compressor?

3hp single capacitor

I want to know uf for my air compressor please help me - On 2021-10-15 by Aiman

by (mod)

@Aiman,

Look at the specifications on the motor data tag.

Some capacitors combined start and run in one physical device. Look at the terminals.

 

Capacitor for Kitchenaid Food Processor that hums and has trouble starting

I'm searching for this Whirlpool motor starting capacitor #8211608 used in a Kitchenaid Food Processor KFP1322ER0. The food processor blade spins, but not with the same speed and a humming sound is especially obvious at low speed

I'm assuming it's the starting capacitor but not certain. Not sure what other explanation there might be. Don't see any other capacitor in the motor assembly. And I can measure the starting capacitor's capacitance easily enough to see if it matches its rating.

Assuming the problem is the capacitor, the problem is this starting capacitor is no longer available, but I did find this picture with the technical specs on it attached below. So its capacitance is 150 MF, rated voltage is 125-185 VAC, and capacitor frequency is 50/60Hz.

I've been able to find other motor starting capacitors on Amazon Canada but nothing that matches exactly. Based on your great detailed explanations, beyond physical size which seems similar, I can find the following capacitors:

* 161-193 MF (range slightly higher than you're suggestion of +20%), with voltage of either 125VAC (SeaKnight)

* 161-193 MF, 220-250 VAC (Packard)

* 145-174 MF (so slightly below the 150 MF of the original on the low end), 110-330 VAC (NTE Electronics)

* 145-175 MF, 330 VAC (Packard at 4x cost of the NTE capacitor)

* 124-149 +/- 5% MF, 330 VAC, 50/60 Hz (Packard)

Would any of these 5 work well? It seems like the MF is the bigger constraint, with nothing fixed at 150 MF. The ranges either fall ~5% below on the low end or > +20% MF rating (~35% above actually) on the high end.
Also I'm not able to confirm that all would be 50/60Hz. Is that a problem?

Any help would be appreciated - thank you.
Kevin On 2020-12-07 by Kevin

by (mod) -

Kevin

If the motor starts rather than humming the start cap may be OK, but there could still be a bad run cap (if there is one) or a failing bearing (most-likely) or even low voltage, and occasionally a winding that opens when the motor speeds up.

I'd get as close as possible to the original cap and give it a shot.

You shouldn't have any trouble finding a 150 uf Capacitor - one is shown below from Amazon


Northern Tool Ironton pony pump motor hums - can't find the capacitor

Northern Tool Ironton utility transfer (pony) pump circuit bozrd burn-up (C) InspectApedia.com MarkMy Northern Tool Ironton utility transfer (pony) pump had it's capacitor die (motor hums, but doesn't turn. Water got into the electronics housing I think.

It was a great pump (I bought an Everbuilt from Home Depot that looked the same, but the pump housing was plastic and it seems to foam my pool water, where the Ironton didn't).

I believe this is a running capacitor with thermal protection, see attached.
It says X2, which seems hard to find.

I believe I still can solder (used to do surface mount stepper ICs back in the day when hard drives were repairable), so was wondering where to find a replacement. On 2020-09-28 by Mark

by (mod) -

Indeed, Mark, a humming electric motor might get running again with a hard-start capacitor but quite often the root problem is a failing bearing that means the motor's future life is going to be short.

You can tell if it's a start or run capacitor by the general ohms range as you will see in the article above. A run cap is always much smaller in ohms rating than a start cap.

If you can find a properly-sized capacitor you don't have to mount it inside the housing if you can connect its leads to the proper points, just as you suggest.

I can't quite read the label on your device but it looks like 0.1 uf 225V but there ars some other ratign data as well - maybe temperatures?

There are hundreds of electric motor capacitor vendors, both local in most cities, and online, as well as the big boys like Grainger who have almost everything.


Refurbishing an old drill press - replacement capacitor doesn't fit into the housing

I am refurbishing an old (about 40 yrs old) press drill.

The electric motor is single phase and runs off 240v. It was fitted with a start capacitor with a rating of 125V and 150uF. The drill has had a previous restoration and the capacitor did not look original.

Unable to test the capacitor other than the motor starts okay I decided to change the capacitor. Concerned by the voltage rating of the existing capacitor (125v) and not knowing if it was correctly replaced by the previous restorer, I erred on the side of caution and purchased a 250v 150uF start capacitor. When it arrived it was too big for the capacitor housing.

On further investigation I have been unable to source a 250V capacitor with dimensions that would fit the capacitor housing.

Reading this page, I have learned that the capacitor voltage is not necessarily linked to the line voltage but to a voltage derived from the windings. Does this mean that the 125V rated capacitor is likely to be the correct capacitor for a 240v motor? On 2020-09-13 by Mike Williams

by (mod) -

Mike

ON the capacitor body you'll see a voltage range like the one you cite - 250v 150uF start capacitor. - that 250-V is the maximum voltage the cap can handle; you're OK using it at lower voltage that matches your motor's data plate.

Replacement capacitor won't fit into the space on the motor

Thanks for your reply. Apologies, my question was not very clear. Old capacitor on 240v motor was 125v 150uF. The 250v 150uF I bought is too large to fit in housing. Question - is original capacitor rated at 125v okay to be refitted on motor driven by 240v line voltage?

My logic is that as no 250v rated capacitor that I have been unable to find will fit in the housing then 125v rated cap must have been correct in first place
Mike W On 2020-09-14 by Mike W

by (mod) - Old capacitor on 240v motor was 125v 150uF.

Mike

Thank you for the added information. I may still be a little bit in the dark on this but it sounds as if all you need to do is wire the replacement capacitor and find a safe place to mount it outside of the motor since it doesn't fit inside. The capacitor can be anywhere close to the motor, of course keeping your wires as short as you can.

Capacitor for home made air compressor motor: Egido Colombo IME Motore Asincrono Monofase

Capacitor for home made air compressor using  an Egido Colombo IME Motore Asincrono Monofase (C) InspectApedia.com Mick

I have had a capacitor blow on my home made compressor which my Dad made many years ago so has great sentimental value

i use it but have had this capacitor blow and would like to repalce it. it has an italian motor on it and the make of cap is FACON

but i am having problems tracking down a repacement can i just replace the one thats blown or would it be wide to repalce both sorry to show my ignorance

but i have no clue to whatthe middle one is i am assuming it could a starter cap? thank you in advance mick c

Below: the data tag from Mick's air compressor motor shows its a 1 horsepower 230VAC single phase 10A motor that runs at 1450 rpm.

Capacitor for home made air compressor using  an Egido Colombo IME Motore Asincrono Monofase (C) InspectApedia.com Mick

On 2019-08-25 by mick

by (mod) -

Capacitor for home made air compressor using  an Egido Colombo IME Motore Asincrono Monofase (C) InspectApedia.com Mick

That is a 16 uF 42-50Hz 280V capacitor produced by Facon - a Chinese manufacturer of capacitors, though your particular capcitor No. 6912 indicates that this Facon cap was produced in Italy.

Details are in CAPACITOR SIZE DETERMINATION for ELECTRIC MOTORS

 

What is the right start capacitor for the Zhang Qiu Hai Er DianJi You Xiang Gong Si motor shown in this photo?

Zhang-Qiu-Hai-Er-QC.J-01-AC-Motor data tag showing start capacitor rating  (C) InspectApedia.comCould you please point me towards the correct capacitance for a start capacitor that can be connected to the engine presented in the attached picture?

I'm afraid I will install a too high or too low capacitance or voltage capacitor and damage the motor. T.P. by private email 2017/07/14

Reply:

The label reads 16 µF 450V, that's the capacitor that Zhang Qiu Hai Er DianJi You Xian Gong Si the manufacturer specifies for this particular electric motor, apparently model QC.J 01.

Reader follow-up:

Correct, the labels reads 16µF 450V. Is this the capacitance/voltage that I should use for the start capacitor? The 16µF seemed too low compared to the tables you presented in your website.

Reply:

The final Authority on the correct start or run capacitor to use with any motor is of course always the motors manufacturer.

The motor shown looks like a Haier double speed electric motor shown in the photo below, excerpted from haiermotor.en.ec21.com/ where no details nor specification sheets for the motor were found.

Haier two speed electric motor at InspectApedia.com

Zhangqiu Haier Electromotor Co., Ltd. is a long-established producer of Haier electric motors located in Zhangqiu Economic Development Zone Jinan, Shandong, China and doing business since 1958.

The company became a subsidiary of Haier Group in 1998. These motors are used in household appliances such as washing machines, with other motor models used in refrigerators, air conditioners and other equipment.

More information including contact suggestions for repair parts or service are found at HAIER & HAIER AMERICA

 

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Citations & References

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