How to Wire a 240 Volt (220) Outlet for an Air Compressor - NEMA 6-20 - 12-2 Wire - 20 AMP Breaker

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In this video, I walk through the steps of wiring a 240v outlet for use with a Craftsman 4.5 HP air compressor. The motor on this compressor draws 16 amps. For this job I used 12-2 wire (12 gauge), a NEMA 6-20 outlet, and a 20 amp 2 pole breaker. Please use caution any time you're working with electricity. Consult the manual for specifications on current draw and distance. Some devices will require a heaver breaker and possibly heavier gauge wire.
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Due to factors beyond the control of Mark Jenkins, I cannot guarantee against improper use or unauthorized modifications of this information. Mark Jenkins assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. Use this information at your own risk. Mark Jenkins recommends safe practices when working on vehicles and or with tools seen or implied in this video. Due to factors beyond the control of Mark Jenkins, no information contained in this video shall create any expressed or implied warranty or guarantee of any particular result. Any injury, damage, or loss that may result from improper use of these tools, equipment, or from the information contained in this video is the sole responsibility of the user and not Mark Jenkins.

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5 окт 2024

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Комментарии : 101

@nogripes 2 года назад

NEMA 6-20 Outlet on Amazon - amzn.to/2GAtxuy Wire Stripper Tool on Amazon - amzn.to/32cU1Ms Multimeter on Amazon - amzn.to/33ldThR

@BlueDreaux 7 лет назад

One tip that you might want to go back and redo, when wiring the circuit to the breaker, and really to any electrical component, put the wire in on the left side of the screw so that when you tighten the screw it will pull the wire in and ensure better contact.

@AndTheCorrectAnswerIs 6 лет назад

The white wire should have been wrapped (in the box and at the receptacle) with red tape since it is now being used as a hot leg and not a neutral. I see from the comments that some people think this is a neutral wire. You NEVER screw a neutral wire to a circuit breaker...only to a neutral bus bar. In the US a 240v circuit contains 2 hot (120v) legs (usually a black and a red wire), and a ground. A white neutral wire is used to complete the circuit on 120v which consists of a neutral, a hot (black), and a ground (green).

@bamamike1013 6 лет назад

AndTheCorrectAnswerIs Great clarification. Dealing with old house. Currently I’m trying to hook up a 20a/220v window unit ac. Opened up the solid wall plate and there’s the 220v wire inside. 3 wires, black, red, white. I have the same 20a/250v plug. 2 brass screws, 1 green screw. Shot the black & red wires @124v each, white wire=0v. So, I’m wondering what to do with the white wire? Hook it to the green screw?

@isaaclang6031 5 лет назад

AndTheCorrectAnswerIs Thank you! I've watched several videos and not one of them shows coding a hot white wire with red tape, paint , or marker- nothing! It saves yourself and the next guy a lot of confusion in the future.

@targeted4truthjahsun 4 года назад

Thank you, I was appalled at the.lack of explanation of this dangerous tutorial

@targeted4truthjahsun 4 года назад

Is it safe to leave neutral out? Since he used it as hot leg?

@targeted4truthjahsun 4 года назад

@@NikkiWalters653 the white goes to the large prong on a plug usually, while bare wire is ground and is hooked to round prong. I am still not clear how the perpendicular prong(that's supposed to be hot 240v), is supposed to be wired

@peterfaggella3120 9 лет назад

Mark! Thanks so much for posting this video! I was given an old Dayton welder by my father in law and needed to hook it up. I didn't feel like paying an electrician and I'm a new homeowner who's handy. Thank you for outlining everything I had to do. Based on seeing your video, I went to Home Depot and bought the correct stuff, wired it up and she works great. Glad I found your video!

@blackpepe Год назад

huh heh heh heh u have f4g in your name

@peterfaggella3120 Год назад

@@blackpepe and you have peepee in your name...

@garychristiansen508 6 лет назад

Good job! I have some 240 volt electrical coming up to do and I needed to view some examples and videos to do it.

@georgedavis1993 10 лет назад

I thick this was a really good and useful video. I would like to add that most regs require outlets in the garage to be 15 inches above the floor of the garage.

@hoangtq Год назад

Great video, just what I was looking for ! thanks !

@chriss5999 2 года назад

Thank you sir. This video was very helpful and was just what I was looking for

@garrytalley8009 3 года назад

The white wire should have been changed to a hot wire color using a 2/1 wire. Just to be in code and not confusing to anyone else working in that box in the future. Colored shrink tubing works well. It is a good idea to use this stuff when ever using a white wire as a hot wire even in putting plugs on power equipment that come with no plug that use a wire not to code.

@AhsenJabbar Год назад

Right. I noticed that too. Some red electrical tape works too

@charlyostrowski7890 5 лет назад

Old video but searching today lol. I think your father in law probably said something about your panel connections to the breaker under his breath or maybe out loud lol. Nice work and thank you for sharing bits of knowledge. Cheers!!!

@colinstu 8 лет назад

Square D breaker in a Siemens panel D:.... not good. It may work, but not recommended by the manufactures, neither is it code. For an instructional video, might be best to show the safe/legal way.

@skyviewproductions 2 года назад

Came here just to see the comments on this. Lol

@jrlegacy23 6 лет назад

Always remember, Black to Brass, you bet your ass!!! And straighten out those cover screws, that drives me crazy. LOL

@rtel123 7 лет назад

there are no rules about the ground hole being at the top or bottom, but most 90 degree plugs have the ground post on the cord side, so in this outlet, the cord would have to point up and then make a u turn to go down to the floor. That is why the vast majority of houses have the hole at the bottom.

@jesusvazquez326 9 лет назад

Really useful, would have been better if you did some explaining on the type of wiring

@skilledevolutionllc.4089 10 месяцев назад

SO IF YOU MAKING THE WHITE WIRE AS POWER YOU HAVE TO PUT A BLACK TAPE AROUND THE WIRE TO LET THEY KNOW THATS A POWER TOO

@tomoneil4366 10 лет назад

That new outlet should be labelled 240V ONLY now that the "neutral" (white) is no longer neutral but the other phase of the 120V supply. If someone plugs a 120V device in, like a hand drill, it will burn up since it is now being supplied with 240V. In addition, the white conductor, now being hot, is a safety hazard and should have red tape on both ends to let the next person know it is now hot and not neutral.

@liskaerik 10 лет назад

I see your point but it would be physically impossible to plug a standard 120 device into this outlet. the hot legs on a Nema 5-15 and Nema 5-20 are always in a vertical orientation. for 220/240.... the hot legs on both the Nema 6-15 and 6-20 are in a horizontal orientation making impossible to plug a 120 into a 240 volt outlet. Unless someone miswired a 120 outlet with 240 volts.

@vernmitchinson2013 9 лет назад

Erik Liska The socket in this video has both vertical and horizontal so a 110 appliance could be plugged in thus the end of your appliance or maybe even you.

@tomoneil4366 9 лет назад

Vern Mitchinson I stand corrected. It looked like it had vertical openings on both sides along with the horizontal slots making some kind of combo outlet. Since it has only one vertical and two horizontal slots it is indeed a 220v outlet. No need to get your undies in a bunch. A simple clarification would have sufficed.

@williamnicklaus2203 5 лет назад

Please mark the White wire - Black, or Red to tell all it is a HOT wire in this application and NOT a neutral. Could have wrapped the outlet terminals with electrician's tape to help prevent an accidental shock.

@heroknaderi 6 лет назад

thanks just cirious how does the neutral work in this kind of setup

@erikcloud3596 4 года назад

@kevin Naderi There is no neutral

@jamesdaniels3582 6 лет назад

Great video.....is the power cord to the compressor a 12 2 wire as well. How many AMP is the plug you are using on the power cord!

@curtiswalter86 5 месяцев назад

I need to use generator to power same compressor. Should I just modify a 220 volt cord?

@coffeeisgood102 2 года назад

I was confused why you used a white wire. Where I live white is neutral. I would have used red and black to differentiate the two wires. Not criticizing, just asking.

@nogripes 2 года назад

Yes, see here.... it should be wrapped with red tape. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-OJxIvH3T2fk.html Lok to the left and you'll see that I later wrapped it. sorry for the confusion.

@williecruz1755 10 лет назад

menom7, since you're starting with 110v outlet in the first place, it won't make a difference "tapping" those four (2 hot and 2 common) to the 220 receptacle. You will still have 110 volts coming out of it. 220 means having two hot wires and that's why you have to replace the breaker. Good luck and be careful.

@MirroringTruth 4 года назад

Yeah...Not sure about this tutorial..Yellow wire is normally for 120 outlets, white for lights and switches....That should of been orange coated. And when you hooked to the receptacle, you have the white on the brass screw. Easy way to remember is "Black is brass, White is light (silver screw)"... I'm not an electrician, but i've worked around those trades for 35 years....I could be wrong, but I don't think I am...

@DannyPacheco-j6f 5 лет назад

Thanks for sharing

@ianmarkey9434 2 года назад

Do you have a place for 2 wires on the breaker or is that just for 30 amp breaker?

@thebigdille 10 лет назад

Thanks, lots of info i was looking for. :)

@ianmarkey9434 2 года назад

You're only using 3 wires? I gave 4 wires white bade black and red. Do I not connect the red? I have a double pole breaker.

@Moore52833 9 лет назад

I have this plug in my house can I purchase a adapter to plug in it to make so I plus my regular 3 prong surge protector into it?

@PJB4453 8 лет назад

No, that surge protector is for 120. This outlet is 240

@effielynnflemingksl218 2 года назад

Should have mentioned to mark the white wire as HOT...in receptacle...with red tape possibly...

@LogicSpeaks 6 лет назад

I'm confused - can someone help me out? My air compressor is a 230 volt - I've wired it before to the dryer outlet through 2 lives and a ground, but now however I moved to another home. This new home, only provides you with 2 lives and a neutral. After unscrewing the breaker panel I found that both bus bars on left and right appear to be neutral. The reason I believe this to be the case is because both sides are connected by a "bridge" like metal flat piece. The second reason is because both sides have mixed white wires and mixed unsleeved copper wire (ground?). With all this said and done - I've read that IF both bus bars are neutral and no separate ground - you can use that as a ground - which means I can connect the neutral to the ground section on my air compressor. However I'm hesitant because it also says that you shouldn't mix ground and neutral. BUT that seems to be true only if you have a separate ground, which it seems to me, this house does not have a ground - which implies that the neutral acts as the ground. Finally, if I'm incorrect about the above assumptions - how do I wire the 220 air compressor? My assumption is that I can ground the air compressor to itself but there isn't any indication as to how thats done and the documentation simply demands that you seek a qualified electrician to do a job that may be a 5 minute connection that costs 150 dollars. Yes I know the implication of doing it wrong - hence why I'm doing research before I do anything without some sort of certainty. PS - I wired the dryer from a 4 wire to a 3 wire by wiring the 2 lives and neutral and simply ignoring the ground wire as it doesn't exist and wired the ground to the dryer. Works great. Can't seem to do that with the compressor.

@charlesball6519 4 года назад

Ground and Neutral connect to the same bars.

@kingofrandom9504 4 года назад

@@charlesball6519 house is probably to old to have ground wires

@bobbydbuilder2873 Год назад

I have a nema 10 20 with 2 gold screws and 1 silver. And no ground screw? How does it get wired? I need help

@bobbydbuilder2873 Год назад

Help

@menom7 10 лет назад

Hi Mark,I TOO have bought a 220volt/20 amp outlet and was trying to wire it into my garage wall-outlet,but that has DUAL 120volt receptacles in it and when I tried wiring in the 220v outlet,I simply "taped-up" the other positive and negative wires that went to the 2nd 120v outlet,so when I turned on the 20amp breaker the wires go to,no power went to my 220v outlet,because the OTHER "taped" wires weren't hooked to anything to complete a circuit. My QUESTION is,would it be "safe" to simply tie the 2 positive wires together and the 2 negative wires together,that originally wired the two 120volt outlets and wire them to the ONE 220volt outlet? I'm afraid it'd start a fire from arcing!?!?

@Lochness1313 Год назад

Not sure how I got here. lol You only have 5 problems with your install 1) Use a level when marking out the lines 2) Use a drywall saw for a cleaner cut 3) Get real screwdrivers. Most electrical uses #6 or #8 Robertson screwdrivers 4) After installing the wires, wrap the receptacle (especially the bolts) with electrical tape. Less likely to short out on the ground wire 5) In a utility room, consider using a stainless steel cover. Other than that. Not bad.

@rwaters7799 7 лет назад

this is the outlet we have for our through the wall ac unit. problem is we now need a new unit and cannot find any with plugs that will fit this outlet. are there any adaptors we can use? landlord will not pay for electrician and wanted to buy us a lower btu ac unit but those plugs still won't fit.

@saelee33 11 лет назад

I'm planning to run a 1000 each ballast ( I'm going to run 2) I was wondering if I can run two 220 outlet like your and share the same double pole breakers which is going to be 40 amp double pole breaker? Please help.

@MatHelm 9 лет назад

For anyone confused about USA 220.. You have three wires run into your house (No ground). Think of the neutral wire as the middle one. Now if you measured from the middle wire to either the left or the right (hot) wire, you would see 110v. But the left 110 is opposite of the right 110 (180 degrees, or 220 apart). So if you measure with your probes from the left wire to the right wire, the two equal 220v. It's a sign wave, one side up 110 (avg) from 0, while the other side is down 110. In a 110 plug your two wires are connected to the middle neutral, and either the right or the left 110 hot. And I think you really only need be concerned about the side (right or left) when wiring a 3 or 4 way switch. As it has been known to happen that some have actually ended up with supplying 220 to a 110 bulb because of connecting the different switches to two different sources, and ending up with a "left" hot on one switch, and a "right" hot on the other. A 3 prong plug ((not including ground) sometimes referred to as 240) uses all three of the wires from the power company. I think this is normally done for the higher amp-age needed for a stove or dryer (60 amps).

@rtel123 7 лет назад

the three conductor plugs are for appliances that want both 120 and 240 for various parts. For example, a clothes dryer has a 240 volt element and a 120 volt motor.

@craigkovatch7564 3 года назад

Would love any tips from you/your FIL about safely and correctly removing a lower knockout on the service panel. Looks like yours was already out?

@Andrea33301 3 года назад

It should just pop out with a flat screwdriver. (I guess you figured this out 8 months ago.)

@kennydrew1 9 лет назад

i have a question so my wire and a a white wire connected together and a single black and no copper and i have an outlet just like this one but im not sure if i just hook up the white one and black one the other side and done ?

@nonetheless01 Год назад

What hp is that compressor?

@stealthcon6975 4 года назад

I'm installing the same type of plug for a window ac that is 230/208 15 amp I'm told two different things 1 is double pole 20 or 30 and the wire I'm told is 12/2 or 12/3 lol need to know wat is right

@wildwoodtop 8 месяцев назад

What is the purpose of this weird shaped Outlet 🤔

@ianmarkey9434 2 года назад

Ironically I just bought the same compressor

@Ojeramup12 5 лет назад

I currently have a NEMA 6-20 receptacle for an 18,000 BTU. Can I replace the receptacle with a 110 volt receptacle and also change the breaker in the panel. I THINK the wire is a 10 gauge.I want to run a 15,000 BTU or 12,000 BTU window air conditioner. Ask your father-in-law.

@Ojeramup12 5 лет назад

Thanks, I will try it out.@@nogripes

@multiplemiggs3448 5 лет назад

Mark, I am trying to get this outlet with a GFCI on it (surge protection). Do you happen to know where to find one?

@KevinCoop1 4 года назад

Multiple Miggs GFCI and Surge Protection are two totally different things. What are you trying to plug in?

@sixxkilur 8 лет назад

Nice work! I have the same NEMA L6-20R 20Amp 250V outlet that came with the house I am in. The outlet is wired directly to the outside service panel on a 30 AMP double pole breaker; the black is on 1 pole and the white is on the other pole. The ground is ran to the bus bar not sure if it is on the neutral or ground bus bar I would have to wait until the rain stops and have a look. When testing outlet I get 120volts not 240volts; the tester does work on 240 outlets because I tested it on dryer outlet. I have replaced the L6-20R with a new one just in case outlet was bad. Do you have any idea why this is only showing 120 on test. I tried setting a ATX PSU to the 240volt and testing the outlet that way; no power on PSU and the PSU is bridged to run without a main board connected.

@rtel123 7 лет назад

fwiw, the neutral is grounded. The bare protection wire and the white in a 120 volt circuit both go to a grounded bus in the panel, and the neutral from the street is also grounded at the street. From your description, you should see 240 between the two hots, and each one should read 120 to the ground.

@veganwally 3 года назад

A craftsman.

@ChristiannTyler 8 лет назад

I need some quick insight please sooo I got a 80 gallon air compressor which is a 240v 23.5A I got it uses and connected to it was a 30amp breaker I don't know much about this stuff but we did get rid of our jacuzzi which has 2 60amp poles on it and we have a trailer hookup but I think it's only a 120v so I'm curious if the power that was going to the jacuzzi could it now be used for the air compressor and why would their be breaker hooked up to the air compressor when I got it it was just hanging there so I'm not sure if That breaker is the only one needed and I just need to get power to it or if I gotta put one where all the other circuit breakers are as well I just don't have any open spaces

@joseluissaavedra4364 6 лет назад

Can I change that motor from 240v to 110v?

@ShyRage1 4 года назад

So a 12-2 wire actually has 3 wires?

@ShyRage1 4 года назад

@@nogripes OK lol, thanks for that info. I was thinking to myself, hey wait a minute. Now it all makes sense.

@Opiemus 4 года назад

@@ShyRage1 it's usually referred to as 12/2 with ground.

@robertfurdas2760 4 года назад

You are using the wrong breaker!! The breaker brand has to match the panel brand!!

@halnywiatr 2 года назад

Red wrap. Red wrap. Red wrap.

@nogripes 2 года назад

I did... look here to the left of the box. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-OJxIvH3T2fk.html All work and no play makes Mark a dull boy.

@DMT5496 7 месяцев назад

Did your father in law give you that straight slotted screwdriver for the job?

@edcrespo1722 5 лет назад

Well then why do they call this a 240 and they call a 10 3 one 240?

@edcrespo1722 5 лет назад

@@nogripes okay so I figured it out, After thinking a lot about this. the dilemma was that when people would ask me to install a 240 outlet I wouldnt know if to do 12 or 10. So my conclusion was the amps. 10 can handle 30 amps and 12 can not. So when they tell me to install it now, from now on I will ask, "how many amps does your appliance need" BOOM!! So I knew they were the same voltage but I never put into account the amperage!!

@Awsometurtle20 3 года назад

i have the same compressor lol

@a-yates 6 лет назад

Electricity doesn't care what color the wire is lol

@tylerfletcher7388 7 лет назад

could some one help me identify where my white and black wire go on this outlet

@tylerfletcher7388 7 лет назад

I can send a pic via face book

@Duffman8815 7 лет назад

U just need two hot wires. Dont need a neutral. Oh and a ground.

@MrTelecaster420 10 лет назад

I am confused as fuck....If you use the neutral as a hot wire then you have no neutral to go to the ground and if you use three wire where does the neutral go?

@johnOConnorvegas 8 лет назад

it's 240v no neutral. but he should have marked the white wire with red tape to designate it a conductor, not neutral. 120V on black 120V on red ground green if you measure with a volt meter. black to green 120V red to green 120V black to red 240v

@juanespinoza5753 10 лет назад

you didn't even show witch color goes to witch ? lol

@dylanlink1243 10 лет назад

He's correct, in this situation polarity doesn't matter

@targeted4truthjahsun 4 года назад

Using pronouns like this one and that one are not helpful. You didn't even tell us how you were achieving 220 with.omly 3 wires, I still clueless and wasted a ton of time watching your unexplained( with any relevant info) video. Very disappointed. Please be very explicit with.wire numbers, colors, etc... Poles... Why no explanations?

@earthstewardude 3 года назад

what a crappy video! can't follow him with the shaky camera movements!

@pleasureme2 8 лет назад

What kind of plug did you use for the compressor? just a repair chord for hand held tools?

@davidreyes5630 4 года назад

Ben Travels to

@dadmiral5298 8 лет назад

So with the fact that the voltage supply in the US is 120 Volts,what this implies is that it is also possible to use equipments that runs on 240 volts.

@PJB4453 8 лет назад

We use 240 for dryers, stoves, and certain power tools and stuff. We also use 208, 277, and 480 for some things. 120 we use for the majority of domestic appliances. So basically 240 outlets are only seen a few times in a home.