How to Install a Transformer - Let's Break Into It!

[@landerselectric]

Electrical contractor here. Maddox is AWESOME!! Lead times are amazing and quality is AMAZING!!! Keep it up Dustin. Love your videos!!!

[@MaddoxTransformer]

Thank you @landerselectric! We really appreciate it.

[@landerselectric]

@@MaddoxTransformer You’re welcome! Love your customer service and product availability. Quality transformers for sure! Next time I install one of them I am going to do a full tutorial video on my channel as well.

[@MaddoxTransformer]

Thanks @@landerselectric ! Excited to see it!

[@VariacManiac]

I was surprised at how quiet that transformer was! Those transformer pads are a godsend! Thanks for sharing this!

[@i-love-comountains3850]

Yeah that almost bit my azz once. I was helping swap out a transformer and nobody called out that it was live. I went to reach into the transformer to grab a piece of trash and my journeyman grabbed my arm and saved me from a world of hurt. Solid reminder to ALWAYS do a call and response for energizing circuits.

[@prestonpalafox4236]

I love this definitely more videos like these. Never really got a chance to see the install while at school so it’s cool I got to see it through your channel

[@Ephesians-ts8ze]

Transformers are big, heavy, and look intimidating to hook up as an apprentice but in reality they’re not much more difficult than wiring a 3-way switch. But the consequences of hooking one up wrong can be deadly.

[@aquamansanchez8784]

Thank you so much. This video was very informative. I wish there was a secondary video of the full installment. I'm sure myself and others would pay extra to see. I know you're busy, but anything you put out is greatly appreciated. Your amazing man!

[@JustinStartari]

Dustin never misses any detail in explanations 😂

[@MrP0EP0E]

I'm happy to see you posting videos like this again. Love the content

[@LambertBrown-e8j]

Good brother ...absolutely clean and teachable work. very passionate of the electrical trade.

[@carryjurek2019]

Great video. I’ve always wondered about the step up requirements. The HO was what I learned.

[@damon-burton]

Really helpful. I've always been curious about how transformers work. Now I have a better understanding in installing them. Thanks for the troubleshooting tips.

[@JimmyDanieley]

You are a true tradesman

[@JohnThomas-lq5qp]

In older electrical closets often have to hang up to a 112 KVA transformer at least 6'"6 ftom the ground because of no floor space. Always used at leastva 3' long ource of Greenfield on transformers to help with noise transmission.

[@billyvazquez3212]

Wire brush the paint of the grounding lugs

[@shawnwaterssw]

Great video.

[@zcollincollin8939]

Ive always used Brown Yellow Orange for 480V.

[@stefaneisenhower4054]

Yeah same, why the purple?

[@mamaswamma1234]

Orange is used on some older 3 phase systems as a high voltage leg. I think alot of guys use purple to avoid confusion.

[@hunterstark9556]

Same

[@gc2797]

I believe in Texas, where he is located, they use purple in place of orange

[@stefaneisenhower4054]

@@mamaswamma1234 that makes a lot of sense actually thanks for the reply

[@admirableawesome2317]

this was a good one!

[@jacobbotden5641]

If you put rubber pads under a transformer but then tighten down steel bolts onto the steel bottom flange you are negating a ton of vibration dampening by sending the vibration through the bolt. Either leave the bolts loose or put rubber under the washer too.

[@garrysekelli6776]

Yeah. There should be no metal to concrete connection.

[@DomReacts]

That’s what we do for commercial rubber pads on each corner

[@ADawg478]

Legend been watching you for years🤟

[@Raze-pf8qi]

I’m a residential electrician for about 2 years now, going for my wireman’s soon. I was just wondering if there were some books you could list that you recommend to gain the most knowledge. I like explaining things to homeowners when they have questions and know what I’m talking about. Thank you!

[@DaunteNicholson15]

Must be nice man I’m a commercial electrician about 1.5 years in all I’ve done is digging and boxing 12 story buildings

[@robertshivers7156]

Man these KOs on the Eaton 240v disconnects have been just like that it’s ridiculous!!!

[@IrishG-fs4fy]

Great video

[@SkylerManac]

Hey! I'm an electrical inspector in Georgia and have learned a lot about electrical work from my mentor, who is a retired licensed electrician turned combination inspector, over my career as an inspector. I have a question that goes a little beyond code and actually contradicts code that my guy doesn't really have time to explain but I wanted to see if maybe Dustin can answer. Is there some where I can submit my question with a drawing so that he understands my question and possibly answer in detail.

[@mayerkatz2836]

Just wondering why you didn't run the flex cable inside the studs

[@yevonishenko8188]

You cannot run the GEC thru ventilation holes. New 2023 code. Also you don't have to use bonding bushings if you don't use concentric or eccentric knockouts or if said knockouts are listed for grounding.

[@swearenginjs]

You are correct. The 2023 code does it allow you to run your ground through the vents.

[@robertsheldon5919]

Great video, I appreciate the code references. Just make sure you prote t yourself with the right level of PPE brother. I know its all new stuff but you know there should be voltage rated ppe and arc flashh gear used while interacting or testing 480V equipment. Be safe brother. We appreciate you!

[@JohnThomas-lq5qp]

The higher piece of Greenfield could be installed at least 6" too high. Inside of transformers have s line or mark that states domething like " Do not install conductord above this line ". Transformer core can exceed 200 degrees F.

[@santiagocontreras5889]

Don’t panelboards fed from a transformer need overcurrent protection per 408.36(B)?

[@ernestperino9334]

I believe you are correct

[@connorwinn6860]

408.36(B) Exception: A panelboard supplied by the secondary side of a transformer shall be considered as protected by the overcurrent protection provided on the primary side of the transformer where that protection is in accordance with 240.21(C)(1) Basically, if you have primary protection on the 3-phase delta-delta connected transformer and its overcurrent protection is properly sized per 450.3, then you do not need secondary overcurrent protection for said panelboard.

[@connorwinn6860]

240.21(C)(1): Protection by Primary Overcurrent Device. Conductors supplied by the secondary side of a single-phase transformer having a 2-wire (single-voltage) secondary, or a three-phase, delta-delta connected transformer having a 3-wire (single-voltage) secondary, shall be permitted to be protected by over-current protection provided on the primary (supply) side of the transformer, provided this protection is in accordance with 450.3 and does not exceed the value determined by multiplying the secondary conductor ampacity by the secondary-to-primary transformer voltage ratio.

[@santiagocontreras5889]

@@connorwinn6860 that’s if it’s a single voltage, he derived a neutral from that secondary, giving him 277,480. So that rule doesn’t apply

[@connorwinn6860]

@@santiagocontreras5889 Good catch, I misunderstood that. Thanks for the information, and I do think you’re eight now but there must be an exception, we have a similar setup at the site I’m on with only primary protection for a 120-208 panel fed off the secondary. Otherwise, we need to make corrections lol

[@danieljuneau229]

240.21(C)(1) you derived a neutral so now you need secondary protection.

[@awesome6486]

does he already have it with having the secondary panel breaker?

[@danieljuneau229]

⁠​⁠@@awesome6486the secondary panel that he has is a main lug only panel. There is no main breaker for it.

[@awesome6486]

@@danieljuneau229 thank u!

[@danzelwesingtone7413]

Nice bro 👍 thanks 🙏

[@daltondelaney9534]

Why did you size your ground smaller than your other conductors at 5:00 in video? Thank you

[@SassafrasSapling]

What is that 480v panel being used for?

[@tcross7287]

250.104(D)1 requires that The grounded conductor of each separately derived system shall be bonded to the nearest accessible point of the metal water piping system(s) in the area served by each separately derived system. Is there no water piping in the building or did you miss that.

[@i-love-comountains3850]

14:08 just one point, did you break the paint under those ground lugs? My foreman would always make sure we broke/sanded the paint under and beyond the borders of the added ground lugs or to run a jumper to the manufacturer bonding strap/lug on the left there.

[@i-love-comountains3850]

One additional - i was taught that it's good practice to run a continuity check on every conductor, after all eqx is installed and prior to energizing. The foreman who taught me that had a bad breaker with an internal dead-short, and it detonated when he energized it. The only thing that saved him was that he was in a full 40cal suit with rubbers and leathers. It was a little 15KVA xfmr like that one, too. Just food for thought. I liked that you suited up for the Zinsco panel change. It's odd how we tend to skip those precautions at our own shops, eh?😅 No disrespect but I winced hard when you just turned away and flipped the breaker with bare skin and no deadfront....you gotta get lucky _every single time you do that._ Murphy's Law only has to get lucky _once._ Stay safe out there, brother. You got people who count on you🙏

[@tedmore9039]

Up here in New England we use Brown orange yellow and we call it B O Y for 277/480 V

[@jolyonwelsh9834]

In this case you will need secondary over current protection. You have dual voltage on the secondary. You can get away with primary only OC protection if you have 2 wire primary 2 wire secondary for single phase or 3 wire delta to 3 wire delta for 3 phase.

[@oldtimefarmboy617]

For vibration purposes, I would have made a plate for the top of the mounting flange with a piece of rubber on the bottom and then installed the anchors on top of that. That way you have a piece of rubber under and over the mounting flange to completely isolate the mounting flange from anything it can vibrate against and make it even quieter.

[@Tokk4-A]

Is there more of 6 ft metal flexible conduit on secondary? this rule applied in transformer?

[@parkershure2333]

It should be yes I believe he used too much flex

[@SierraGolfFoxtrot]

Please do a video on your custom tool belt… I’m always looking for for the perfect tool belt and tool bags!

[@Anonymous-pn7wb]

Hey Dustin I was just wondering if you could make a video with answers to questions that electrical apprentices would be expected to know while going out for an interview

[@shawnbarnett3663]

Hey Dustin, My question is when you have a 277/480v 400 amp panel that has breakers up to 100 amps but need 125 amp due to 125% code what can we do? Maybe secondary ocpd down to 200 to make sure no more than 200 amps is the load?

[@jro21]

I just installed a 150kv transformer the other day

[@balance555]

I went to school for eletrical and did 7 month in the feild. I live in California and want to get back into eletrical but no place will hire some one who don't have more then 2 or 4 years of experience. Any recommendations for some one who don't have the hook up to a job.

[@xking18]

What's the 480 load? Well pump?

[@calmeilles]

Typically commercial premises use 277V for lighting and HVAC.

[@Easybake92]

I’ve been told recently I cannot put tape on 1/0 or lower wire size. Need to use those markers. It’s prolly per the inspector, but have you guys dealt with that ?

[@mikesmoth-v4w]

can you makw a video on Occc sensor circuitry

[@joshuatrevino6003]

If you aren’t getting 270v from phase to ground or from phase to neutral what does that mean? Apprentice electrician tryna learn

[@justinarmbruster3960]

So if 480v is your secondary why does it get landed on the H lugs as opposed to the X?

[@cyrysvonnachtseite4546]

One thing that always amazed me. # 6 480 3 phase on primary. 2/0 leaving 208v 3 phase …. We had to install disconnects before and after the transformer …. I believe the reason. Transformer goes bad …. Take it out of line completely.. and back feed thru other transfer switches in the electric room

[@ipodacious77]

confused on what is the point of an 18amp 480v panel? What loads are on this?

[@calmeilles]

Commonly the 480Vac three-phase is used to power large electrical equipment like fork lift battery chargers, ovens and heavy machinery. The derived single-phase 277Vac is used in such an installation for fluorescent lighting and HVAC.

[@ipodacious77]

@@calmeilles i realize the use of 480/277 but if the panel can only handle 18 amps, seems kinda pointless

[@calmeilles]

@@ipodacious77 At 10:26 Dustin does the calculation. 15,000 VA ÷ ( 480 V × √3 ) = 18 A.

[@JamalGanam]

Brown, Orange, Yellow I thought is the colors for 480 volt Y 3 phase?

[@GS-lh2nx]

What was the little tilt indicator on the side for?

[@serlalonde8420]

Shipping. Lets you know if it was mishandled or dropped on its side.

[@wolphin732]

instead of hammer-in anchors, have you ever tried concrete screws, like Tapcon screws? They make the removal easy, if it ever needs to be done...

[@Justwastingtimee]

10:28 -- you said 480 x 1.732 = 18A & I know you meant divided by but those listening and learning for the first time its 👉 15,000 ÷ (480 ÷ 1.732) = 18A if you multiply its 15,000 ÷ 480 x 1.732 = 54A just a heads up

[@GypsyMoFoJoe]

480V phase A=brown B=orange or purple C=yellow. Purple as phase B is usually found west of the Mississippi because orange is the only color the NEC has defined a purpose (high/wild leg)

[@petersketch1990]

If i wanna upgrade 200v 330uf to 500v did i need 330uf one on power supply capacitor?

[@petersketch1990]

From what i heard, it is just that. Just get the same one.

[@throttlebottle5906]

as of the last five years, most things with a knockout has been near impossible to break them out. lack of stamping depth/pressure, probably the stamping dies worn beyond limits or no quality control and they just spray them off the line as fast as possible. just put an oven pigtail on the other day, it already had a 1/2 KO and I needed 3/4 KO, I had to snip it with diagonal cutters grab and twist peel it in chunks all the way around, total pain, same for exhaust fans, boxes and panels.

[@tektonelec4695]

Maybe someone can help me out with this. When it comes to the secondary being 4wire 480/277V and landing on a main lug only panel, are these conductors not considered to be protected by the primary overcurrent device per 240.21 (C) (1) which states in order for the secondary conductors to be protected by the primary overcurrent device it has to be a delta/delta system (which this system is delta/wye) or single phase single voltage? Please help my understanding and point me where to look in order to be able to land 4 wire wye secondary on a main lug only panel?

[@highvoltage1979]

You need to refer to the IEC( India’s Electrical Code)

[@sqeekykleen49]

The land of red yellow blew... tree phase spicy... 🎄 ​@@highvoltage1979

[@swearenginjs]

The better question would be why did he run 480 volt to a QO panel. Thats not a 480 volt panel. Thats a QO. It won’t even accept a 480 volt breaker. 😂

[@victimovtalent6036]

can 1 phase convert to 3 phase by transformer?

[@highvoltage1979]

You need OL protection on your secondary feeders.

[@nevrbdwnruby7484]

Just to add a few, a GEC would connect to the X-tran means the grounds and neutrals will be isolated at the panel (What he did).. If the GEC came from the panel, the grounds and nuetrals will be isolated at the transformer... Anyone remember that 250% comes from... forgot..

[@itz_moe]

Lets say I go the Trade School route for electrician, what would be my next steps afterwards?

[@juliusjohnson3177]

After trade school,Apprenticeship for 4 years which includes on the job training and classwork for one week every three months. Depending on which apprenticeship you go like a union could pay for your course materials books and all. Trade school is good to gain confidence. If I knew then, I would have walked onto a construction site and just did the apprenticeship route. Looking back I'm glad I did trade school and apprenticeship in new mexico. Also start buying tools and meters once you learn to use them. Either they break or get stolen. Good luck!

[@DaunteNicholson15]

Go straight to an apprenticeship man that’s what I did after I graduated my company is paying for my school while working on the field getting paid it’s a win win

[@blueskiesinging]

They just don't stamp in those knock outs real good like they used to. I find myself using the knockout punch a lot of the time.

[@mikeadler434]

👍👍

[@gracebonez]

I'm not sure how anything in the wording of article 250.97 points to a description of bonding bushings other than 250.97B(4). All other mentions refer to regular old locknuts of other connector types. I'm not saying not to put them, I just don't see it in the wording here.

[@jt6969]

Since when are QO panels rated for 480?

[@swearenginjs]

They aren’t. That’s what has me confused here. He ran 277/480 to a QO panel that absolutely will not accept a 277/480 volt rated breaker lol.

[@AJr-p4b]

Thank you for the videos, highly appreciate it. Just a small thing, where did you get the third feeder into the primary? In another word, isn't this a residential place?

[@ljubooks1783]

@ElectricianU Hello i have a question for you. I'm a young electrician and I don't know what tool to buy, I need help, if you can help me and give me some advice, I'd be grateful. the only drawback is that I am in Bosnia and it is difficult to get some things

[@beep3r]

or isolation transformer

[@zcollincollin8939]

70E?

[@StreetArtistsOfTheWorld]

Don't need background music, very distracting :( You're explaining stuff, your words are more important than the music.

[@balance555]

I love the math

[@JacobMaloney-u1k]

That panel is not rated for 480v

[@sqeekykleen49]

I thought I must have missed something QO equipment on 277/480...that is new to me... Everything I have seen has bolt down breakers... 😮

[@nonamechannel8110]

He said 208 for the primary and 480 for the secondary. He got it backwards.

[@juliusshalom9099]

He said it’s a step up transformer

[@sqeekykleen49]

This is a rare case, as most are step down...I've only seen one for a lathe that was acquired at an estate sale that was run off a motor singlephase coupled to a three phase generator... the new location had 240v delta... bumped up like what Dustin did, one breaker on the secondary then a motor controller with bells and whistles...

[@Nowslapurself00]

For hi voltage its BOY for us Brown Orange Yellow holy cow that purple is throwin me off fr purple is dimming for us

[@Ephesians-ts8ze]

Those wall mounting brackets seem practically useless and kind of an eyesore

[@davidicousgregorian]

Anybody that watches your great videos probably is a DUI wire and they have never seen a commercial transformer or even heard of three-phase so if anyone's learning anything from you hopefully they have been to school to learn this prior

[@tmillsaz]

Are you saying that Dustin should make this video visible to members only, and only let licensed electricians be members? Looking at your other comments/replies, I'm wondering what your issue is here?

[@kenyattafrazier]

I wouldnt’a done it like that

[@Tom-og7fi]

The square root of 3 is 1.73.

[@swearenginjs]

Wait a minute. That’s not a 480 volt panel. Thats a QO panel. Is this for demonstration purposes or???? This has me confused. I’m positive that’s not a 480 volt panel. I use square D almost exclusively. That’s a QO panel. It won’t accept a 480 volt breaker.