Plumbers have their "own version" of Ohm's law when dealing with pressure, force and area (Pascal's law)

@aurorian1634

3 жыл бұрын

And Gas Techs say Ohms Law is that Amps depend on the length,size and material of the conductor.

@bushgnome

5 ай бұрын

Pedro?? Lol

I went to MMI to become a Harley tech back in 2000. In our first class, theory, we were taught to draw p.i.e in a circle like you did and call it “PIE” because it was round and decided into “a piece for me (P), and a piece for you (I) and your friend (E). The other was just thought as “E-rrrrr” I don’t remember the tag line for it but it was something like … Everyone wants pie (E), I want Pie (I) and rum (R). I may be off on that but, it was in the fall of 1999, so … forgive me if I didn’t get it verbatim. Great video! Added to my playlist for reference.

As a first year apprentice, I really enjoy your videos. You're very easy to understand. Thanks for posting.

I love that brief cut were you must calculate it then come back.

This sounds a little bit confusing but I'm determined to be an electrician, and I want to learn as much as I can. Thank you so much, bro, I really do appreciate this video brother.

@jordandutes975

3 жыл бұрын

how's it going

@kewansmith6116

3 жыл бұрын

@@jordandutes975 almost close to joining the IBEW. 💪🏾💪🏾

@brandon3605

3 жыл бұрын

@@kewansmith6116 which local, also have you done a pre-apprenticeship beforehand or did you just apply? I am 17 and have no experience at all and was just wondering if I should take a pre app before applying.

@kewansmith6116

3 жыл бұрын

@@brandon3605 I'm trying to join local 9 , I honestly wish I knew the correct answers to give you..

@slant757

Жыл бұрын

Dude! It's just the service (voltage) power (which is the electrical panel 120/208/etc... Volts) x (The Amps of the breaker (20amp/15amp... etc) x the load (most cases max.... 0.8%) divided by the max rating of a light fixture..... if a light fixture is rated at 100 volts max.... use that max. Example: Volt's x Amps x Load .8 = WATTS So in this guys video he used: 120 Volts x 20 amps = 2,400 2,400x.8 = 1,920 1,920 divided by 400 = 4.8 So... max.... you can only put four 400 WATT Light bulbs on a 20 amp breaker on a 120volt service.... with a over head of .8% Love this guys vids!!!!

Man, I enjoy these videos. These high intensity discharge (HID) type of lighting sources can be tricky if you are not careful. Don't forget these types also have a ballast to figure in. I understand that this video is a beginner's lesson, but might as well start them off right. That ballast adds between 20% to 25% of the lamp wattage. I use 25%. So the 400 watt "luminaire" is really using 500 watts. Also, don't forget that a circuit can only be run to 80% of its max rating for anytime interval over 3 hours continuous. So the 20 amp circuit is only rated 20 x .8 = 16 amps for "continuous duty". So then 16 amps x 120 volts = 1,920 watts maximum allowed on our 20 amp rated circuit. So, if we try to wire 4 such luminaires onto the 20 amp circuit, we get 4x500 watts =2,000 watts total load. That exceeds the 1,920 max wattage allowed. So we can only put 3 of these 400 watt luminaires on our 20 amp rated circuit. Also, these formulas do not take into account voltage drop on extreme hot days when everyone has AC units cranked up. Lower voltage means more amperage is required to run any attached device. Again, I understand this is a beginner's course, but you have to be careful of someone who might view this video as a design guide, would be all mad if his bootlegged circuit did not work. In all this, I got your back.

@Gangstarszz

3 жыл бұрын

Your explanation just made it click for me. Thank you. Just decided that I wanted to go for it as an electrician

@bruceb3786

3 жыл бұрын

@@Gangstarszz , you are very welcome. I have enjoyed it for 50 years, and still like it, every day. I am also an Engineer. My job is to keep people OUT of trouble.

Really learned a lot more from this than any collage lecturer

@eddiew2325

4 жыл бұрын

Hehe I love u

@Rico702Vegas

3 жыл бұрын

A collage is a assemblage of different forms, pictures or paintings etc. College is where you go for higher education.

@bruceb3786

3 жыл бұрын

Agreed. College does not teach this, but a Technical College does. When I graduated from college with Electrical Electives, I did not know how to wire a 3-way switch. I learned most of that by OJT, and by constantly "bothering" the electricians on the job to teach me. They were ALWAYS glad to oblige me. I became an Electrician, then an Electrical Contractor, and an Electrical Engineer. Now, 50 years later, I teach THEM, and GLAD to do it.

@miguelpb3683

3 жыл бұрын

Thanks for saying that this is the first vid from him I've seen gonna watch this shit religiously now

@galvanizedgnome

3 жыл бұрын

Did you learn how to spell in collage

I started out as an apprentice in a company called "Ponderosa Electric Inc." , 6 years ago. We had shirts with the P/E/I circle as the logo. It didn't hit me until years later after I pulled out one of the shirts to wear to bed haha.

Man you teach better than my instructors in trade school. Thank you for helping wrap my head around this

@lasergame98

Жыл бұрын

To be honest. I rather not driving my car to class every morning wasting my gas money. Electrician U is better and he wears Nintendo hat! :)

I was sure thinking those 6 lights gonna trip out all the time!!! your on point with the follow up!!!

This is without a doubt the most efficient and practical explanation of Ohm's law there is. Top shelf.

i'm good, until you start getting me into the trig for bending conduit LOL. I'm not good at math, but i've learned, if it's something I use on a daily basis, i'll retain. I worked in a case factory for many years which finally pushed me to learn a tape measure FLUENTLY, down to 1/32 in some cases for what I did. Then i got good at remembering the decimals for the common fractions so i could do the math to add them all up. I will say, I kept my old TI-83 from high school and she came in very handy for that reason alone lol. The real beauty of ohm's law is using it to diagnose and verify. I had a 220v heater melt the socket a while back. I knew the situation for several years and knew it had seen a large moisture event, but I ohmed the heater, checked the wattage and amperage rating on the unit, and i already knew the voltage, did some quick maths, and found my resistance to be close to what it should be. Plugged it back in with new receptacle and she worked flawlessly.

R= unit of measure for electron resistance in OHMS. I= unit of measure for current electron flow in AMP, AMPS or AMPERES. P= unit of measure for resistance of load or used energy, Power in WATTS. E= unit of measure for EMF electrical motive force/ pressure in VOLTS. So now you know the definition to each letter and unit of measure. Voltage drop NEC National Electrical Code. Single phase formula. Vd=2KIL/ Cmil First Vd= voltage drop % which is 3% for branch circuit and 2% for feeders. Or. 120 volt @3% = 3.6volt minimum circuit operating voltage allowed by NEC 120V-3.6V =116.4Volt

This is awesome im studying for my aviation certification. This has helped me immensely! Thank you !

Dude... I just learned about Ohm's law and the Ohm & Power circles (Our instructor used triangles xD) in my apprenticeship program and after watching this video, everything that I'm learning in school and doing out in the field just clicked for me. HOLY SHIT! MY MIND IS BLOWN RIGHT NOW! Thanks so much for this video! :)

Hey buddy you are amazing man,just got introduced to you by a friend when stumbled on your vids on yotube now i tune in and it id helping me as a struggling eletrician in the making...thank you man.

You the bomb . I’m so glad you talked about the 80% rule. So folks weren’t hooking up 2400 amps to a 20 amp breaker. Great stuff. And also for the newbies you don’t up grade the breaker due to wire gauge , would be underrated. I’ve seen so many home owners up grade to 30 amp because the breaker kept tripping. Amazing

My man 😎 I gotta say thank you because your videos are top notch. I’m currently in an residential & commercial electrician school and there’s some guys who needed help understanding this. Not to brag but I’m one of the top guys in my class & everyone comes to me for help & it’s easier for me to validate your videos & send links rather than me spend time individually trying to explain what the teacher is talking about. So once again, thanks my good brother 🙏🏽

Hey Dustin! Just a note of appreciation. I learn quite a bit watching your videos. I'm not an electrician, but I am a professor. I've got a background in electrical work in theater and film (nothing to do with my current professor gig), and I have always been interested in electric work. Your videos have really helped me with how to do things the right way around the house. On a professional note, you have a really engaging style and you are a naturally gifted teacher. As someone who teaches for a living, and as someone who teaches people how to communicate effectively, I really appreciate your work! You take the time to do things right and you take the time to explain the "why's" behind what you are teaching. Super helpful and valuable. Keep up the great work!

@ElectricianU

3 жыл бұрын

I really take that to heart my friend, thank you for taking the time to extend such a sincere compliment to me. Means a lot hearing that from someone of your background :) Thank you 🙏

@diywiththedoc393

3 жыл бұрын

@@ElectricianU keep up the great work!

Dude I really enjoyed this video on ohms law. Thanks for the introduction to what it is & applying it in real life. Much love 💯

I wish you'd been my math teacher man. Great explanation of a concept I struggled with for years.

Great presentation. Especially liked the practical examples illustrating the use of Ohm's law formulae.

I was the one kid in school that said I don't need to learn math, that's something I'll never use... Well at the age of 28, after working as a machinst for a year and ½, I learned real quickly what kept me from a $10.00 hour vs. $3.90 hour paycheck. So I went back to school and 💡 it all clicked and I learned how to do basic algebra, ie. P= I×E etc.. But you've even made it more clear than before. Thanks!

@deang5622

Жыл бұрын

Good, I am pleased you finally got to understand the value and importance of it. Sadly, to be an electrician there is no minimum math requirement.

Excellent job explaining ohm's law my brother.... You have a gift for teaching.Tthankyou very much. You really helped me understand!!!

I’ve seen a few of your videos and really appreciate what you’re doing. I’m starting my Apprenticeship this week and I’m trying to learn some basics to have some basic knowledge. Helpful and a boost to my confidence. Thanks!

Super helpful man!! Thanks for all the tutorials.

That really opened my eyes to the field and what I am studying. Thanks Dustin!!

brings me back to the days of electrical technology class in vo-tech the hard part was all the power factors and impedance vs capacitance

WOW! Great way to explain the process of solving the unknowns.

Thanks, really helps you take what your learning out the class room into the field.

Great series of videos, with more information than a homeowner may need. But it sure is wonderful having been exposed to the knowledge without having had to go to a formal learning environment.

Cheers for such a detailed and educational video. Training to be an electrician in Ireland which normally takes 4 years but with Covid its looking like 5-6 years. I last sat school exams 18 years ago so dreading the maths aspect of college. Delighted to find your channel, much love from across the pond.

You execute the theory very vividly even though some of us may not retain it as quickly like you but in due time.

thank you for sharing the knowledge

You did a really good job with this presentation. Great job!

I learned this same thing in aviation A&P school except we did a triangle instead of a circle but its all the same. Some ppl always had trouble but for me it was easy, I just would say out loud PIE and EIR (pronouced EAR) and it would help me remember my formulas.

Your channels great man! Thank you for all you do

I learned all of this shit in high school and it blows my mind at the amount of journeyman I have worked with on the job who don't have a clue how to use these equations. That's what separates the electricians from those who just run pipe all day to those who do the actual electrical work and calculations.

DUSTIN tha" MAN again... YOU R tha" MAN ! ! ! LOVE ALL of your VIDEOS ! ! !

Great video love your channel, keep up the good work.

Thanks for the knowledge!

I’m looking to become an electrician and this is super helpful, thanks

Really good video well explained! Thanks from London

As an electrical engineer I can confirm that a tiny bit of algebra goes a LOOOOONG way.

@deang5622

Жыл бұрын

But most electricians can't handle algebra because they flunked maths in school. So they have to be taught the idiots way.

Excellent work!!

Very well spoken. Watch out Mike holt!

@griffmustard

3 жыл бұрын

Mike Holt wishes he could grow a beard like Dustin...........😂😂😁😁

Wow so helpful!! Thanks

Dude You rock! Finally someone who knows how to teach 👍 thank you

Thx so much man just started learning electrician had to know about this my teacher wasn’t explaining it the way u do thx 🙌

Thank you god this is perfect!!! I needed this video!!!!!

Lol that low blow to them plumber's

@griffmustard

3 жыл бұрын

Have you ever been on a job site where you fight with plumbers for space, and they tell you, you have to move your stuff, because their stuff is gravity fed, and therefore MUST be in a certain location?

Great teacher.👍

So helpful man. I work at a sign company. We specialize in neon, but I also do parking lot lights and such. I found your episode on lamps so useful and made it a manditory watch for my new guys. Just wondering if you could make a video covering neon sign transformers, and/or any other trouble shooting techniques for sign systems (Neon, LED, Timers, etc.) It would be greatly appreciated.

Your a really good teacher bro! You explain in the most easy way keep it up I'm enjoying your content 👍

Thank you sir

Perfect explanation. Now I just gotta remember the 4 units and I’m good

Thank you so much. 👌

Once again thanks for information

Thanx again!

Thanks 🙏

Still always awesome videos bro 🙌🏻🙌🏻🙌🏻

Very good information bro keep it up God bless

The formulas involving Power are from Watt's Law not Ohm's Law, but I understand why you call both the same. Love your videos watch them all the time, keep up the good job.

@BearStar1

4 жыл бұрын

There is NO such Thing as '' Watt's Law '' !! It's all '' Ohm's Law '' of which the Power equations are also from and part of !!!

@tetonux

4 жыл бұрын

@@BearStar1 Just look it up.

@Falcrist

2 жыл бұрын

@@tetonux I looked it up. You're both wrong. Ohm's law doesn't include electrical power... however, P=IV isn't "watt's law". It isn't a law with a name like that. Check the wikipedia pages for "Ohm's Law" and "electric power".

@deang5622

Жыл бұрын

​@@BearStar1No, you are completely wrong. I will explain why. Ohms Law (research it on the internet) is about the linear relationship between voltage and current. It's not actually about a single value of current, voltage or resistance, it's about the straight line on a graph of current versus voltage. Resistors and some other things follow a linear relationship and are said to be "Ohmic". Double the voltage and the current doubles. Plot such figures on a graph and you get a straight line. The resistance is the inverse of the gradient of the line. Ohms law is *NOTHING* to do with power. It is solely about the relationship between current and voltage. But what we do is use the Ohms Law formula for deriving a quantity of voltage or current or resistance when we know the other quantities. And we call the equation Ohms Law. But in reality Ohms Law is actually about the linear relationship between them, which applies to resistors.

Great vid.. just to add heating load 125%

Thank you.

You legit rock, what a great teacher! YES Thank you

@ElectricianU

3 жыл бұрын

Thanks for watching my friend!

Good video man thank you 🙏🏽

Great video please keep the math coming

Thanks for the wonderful teaching explanation. Enjoy learning from you and I did not have to cover my ears, clean talk is enjoyed. LOL.

P=IE is Watts law, but a great video to watch and learn from.

Nice great job🙂

Thank you for adding in the code part after the lamps with it being 80% the load with 4 instead of 6. Trying to learn the code is going to take time and reps so exposure to it is F******* excellent!!! Thank you again for the shout out to sparkys channel. It is great to see another way he does thing same result just different tricks. Like taping contacts in receptacles so you know they don't ground out by accident. Kinda curious if it's going to take to long on a fast pace job? I like the idea tho.

I wish there were more videos of motor controls ... that would be dope for us industrial guys

Great job, love the old school nintendo controller on your hat. Been a gamer longer than I haven't.

I had always consider myself a detective in the field when it comes down to troubleshooting

13:16 ahh.. ok, so we look at the left wheel and cover up the.. oh! thanks dustin! i didnt feel like putting my hand over a spot in the circle anyway lol, thanks for this tho! i did not see how the math was actually applied

love ur videos...

As usual, thank you.

love you videos..

thank you life saver

Dustin, Another very good video! I wish you hadn't used 400W HID lamped pole in your example. Hopefully, later you can use this example as a start to show the real answer of how many on a 120 volt 20a circuit. You touched on voltage drop calc from Uglys. You could have a video on that as well. I used that calc tens of thousands of times except I change cm to max volts of drop(120x.03=3.6). The reason is this gives me conductor size to use. One calc and done. No guessing conductor size to be less than a percentage. Keep your excellent videos coming! Respectfully, Kevin

@ikerivers1795

4 жыл бұрын

Just download the southwire voltage drop app

@KevinCoop1

4 жыл бұрын

Ike Rivers I have the Southwire voltage drop app and it works very well. A question for you. How do you know the accuracy of the app if you do not know how to do it manually? Also, I worked on solar projects for several years ranging from 1 to 37MW. Every feeder from the combiners through to the utility had to be calculated for voltage drop. It is hard to do thousands of calcs with an app on a smart phone. Sometimes better to know the math.

Hey Justin. Love your videos. My I ask how long have you been a master electrician? And how long did it take you to become one. Thanks. Keep the videos comings. Peace.

@Rico702Vegas

3 жыл бұрын

It's Dustin bro...

@Bill_Sawyer

3 жыл бұрын

@@Rico702Vegas OK. No problem. I thought he was saying Justin. But thanks for the correction. Peace.

@erikstaciogarcia2421

3 жыл бұрын

If done right it takes 6 years

transposing formulas ,trying so hard to get my helper to recognize the importance of this

Your good 👏

Really nice, slight bit different in labels, I x V = power, I x V = W, that's E & E, I x E = P that's physics, when in North America doing my journeyman exam, it was taught. I x E =P, tomato toma'to, wiring sizes is crazy in North America, size 8 is larger csa than a size 12, yeah its a rolling cold press conductor form, sparkies around the world are in the club, I am in the international brotherhood of electrical workers, which is not international. Not in the UK elecsa napit, nic eic, (which I am a member also) thanks for the video, good,

@deang5622

Жыл бұрын

Are you a member of the I.E.E.E and British I.E.T ?

Rings of Saturn vibes in the intro 👏🤘

understands this, and this was an excellent way to put/learn it....but what about 3 phase? like 240 or 480....Looking for a simple way for that say a 480v service, an 18K heater.....amps?

Remember that 3 phase motors are rated at 200, 230 and 460 volts. There is some voltage drop already calculated in the motor design. It's usually roughly 450 feet.

@BearStar1

3 жыл бұрын

Wrong ! It's 208 VAC , 230 VAC and 460 VAC , all 3 Phase !!!

@ikerivers1795

3 жыл бұрын

@@BearStar1 the NEMA MG-1 standardizes at a motor rated at 200 volts for use on a nominal 208 system. I believe your confusion comes from the "dual" rated motor of 208-230. So the larger list would be as follows. 200, 208-230, 230, 460, 575, 2300 and 4000 volts. For three phase

Fyi - UGLIES has a wonderful tutorial in the front to walk you through these calculations including 16 iterations of the wheels and then tests to walk you through everything. I retest myself on these every now and then when I get to a job site early. That said, the two formulas you've listed cover most of the mathematical requirements. Thanks for mentioning the 80% rule. I tell Plumbers that I couldn't do their job because I'm afraid of water, and Doctors that I cant do their job because I'm afraid of money.

For the voltage drop example, why are you using the resistance for 100' on a 50' wire?

@jfarley1221

2 жыл бұрын

he included the neutral which completes the circuit. basically the resistance is "felt" during the entirety of the circuit.

good man

I really like how you explain, when you say, you get it, actually you if can explain more in my case it'd help more. 1 question, why not say as a example, just IxE? Why P = IxE ? Why is it always used = to what ever we're trying to find? Hope I made sence. Thank you

@nam.321

3 жыл бұрын

Not sure if this helps. P = Power(watts) or Volts x Amps. I = Amps (Intensity). E = Volts (Electromotive Force).

Danger! You need to isolate the heater from power when your checking for Resistance! In other words, disconnect the load (Heater) from power, other wise you will destroy your meter or yourself!

When you spoke about the voltage drop in that motor we find out that there is a 3.2 voltage drop. So does that mean we have to increase the wire size or bring the motor closer?

@griffmustard

3 жыл бұрын

I can answer this one for you. The code allows 3% voltage drop for Branch circuits and 5% VD for overall feeder circuit. So, on a 120V circuit, 3 percent would be 3.6V. So, a 3.2VD in a 120V Branch Circuit is acceptable in this case. But, to answer your question, yes you would increase the wire size, if the VD was out of the range that is acceptable per the Code. Moving the load closer to the Source is a seldom used option, because the location of the Load is per the design.

Big fan of your work, from halfway around the world (Romania, Eastern Europe), can you show us how to change an old fusebox (the type of fuses with screw-on, ceramic or glass, doesn't really matter) with a new electrical panel that uses fuses with switches? Best of luck in your work, fun learning from a guy close to my age, sick of old electricians who tell me to fuck off when I have a question.

@bruceb3786

4 жыл бұрын

@Christian lulian, I am now an "old guy" who was once a young guy. The old electricians back then were always glad when a new guy would take a real interest in the work and WANT to learn. Sometimes I would say "I don't know this. Can you teach me?" They never turned me down. Now, I am the one doing the teaching, since all the old ones I knew are gone. I never turn anybody down, if they ask and want to learn. Sad that the old ones around you are the way that you describe. They should know that if they teach you, it makes their job easier. They had BETTER be passing their knowledge along.

UGLY's... it's awesome for quick references. First couple pages have a great chart for PIE VIR etc etc. . There's this cool dude that showed me that, named Dustin.

@griffmustard

3 жыл бұрын

Does he have a beard? I think I know that kid !!!!

I love lamp.

(Question) If I’m not mistaken those light poles are rated at 20A per bulb. And you say it is protected by a 20 amp breaker. Well aside from bypassing the D rating calculation you say six lamps can be tied in. But I thought in parallel circuits voltage stays the same and amps increase. Therefore I will have a total of 120 A going to that 20 amp breaker. Shouldn’t that breaker trip? I’m confused

@Aquemini-ug1co

4 жыл бұрын

My apologies. The subject of the lesson was how many lamps can go on a 2400W circuit using a 20A breaker. I did the math and each of those lamps produce 3.3 amps. The way you did your calculation is a lot easier than the way I’ve always done mine. My fault Dustin

K = Direct-Current Constant. K represents the dc resistance for a 1,000-circular mils conductor that is 1,000 ft long, at an operating temperature of 75؛C. K is 12.9 ohms for copper and 21.2 ohms for aluminum.

@deang5622

Жыл бұрын

And the problem with this approach is if you change the cross sectional area of the cable you are stuck. You should use resistivity. The cable resistance is a function of : resistivity of the material for the conductor, the length of the cable and the cross sectional area.

i've been in trade school for about 3 weeks and i'm still kinda slow and not really understanding the basic wiring for circuits.how long did it take for you to get really familiar with things ?

@HazeAnderson

4 жыл бұрын

Learning is much easier when you are actually DOING. I suggest building the circuits you are trying to understand. Most of my circuits only use a maximum of 12v so experimentation is safer than dealing with mains.

@Options_Trader11

4 жыл бұрын

What school

@griffmustard

3 жыл бұрын

Practice......Practice.......Practice !!! aka........... On The Job Traing