As many of the viewers who have commented, I am also an engineer and have been at work for over 50 years and still working. Dave is a unique individual. He can present education clearly. I enjoy his videos as a learning and refreshing program.
I came across your presentations by chance while boning up for an upcoming interview. It takes me back 30 years to when I was in tech college where we had two brilliant lecturers, Elwyn John - electronics & Mike something the electrical guy. Like you they both had the same clarity of presentation, free of waffle, not bogged down in too much math where it is not neccessary, concise & engaging. Well done!
Subscribed. I have been in the electronics biz since 1984 and you sir are someone I could watch for hours. I was blessed enough to have my high school and college professors teach well and convey the rules and laws clearly. I would put you at the top of the heap. Thanks for making fine videos.
Thanks for another excellent video, Dave. Years ago an old timer explained to me, basically the circuit breaker's job is to protect the wiring/equipment, the GFCI's is to protect you!
Powerline Technician student here; I have been looking for a way to wrap my mind around the concepts. How I phrase it to myself is to "Dumb it down" to myself. This helped me so much as I am going into 3-phase and still had to figure out the basics, not just remember the formulas, etc. Thank you so much. I am going to keep watching a your content instead of Karen videos.
Thank you so much. You certainly helped a lay person such as I who is not of the electrical profession to understand the nature of overload and faults that result in overcurrent. You mark out the differences so very clearly.
If I am going to listen to someone go in depth in extremely technical subject matter,I must like the person & their voice can't annoy me,this guy ticks all the boxes and holds my attention,love these videos.❤️⚡⚡
I don’t know why, but watching this video gave me a eureka moment. The reason an inductor can overload when there is LESS voltage is because the inductive reactance is less causing less impedance! And lower impedance means MORE current!!!! Holy shit! And that’s why dimmers aren’t suppose to be used in fans! Because they increase the resistance of the circuit which causes less current and the less current results in LOWER impedance and the lower impedance causes more current! Holy shit I am so happy it clicked!!!! I don’t know why which this specific video man but u are awesome! Im like level 4 nec but this always puzzled me and none of my instructors could make this link for me! Don’t stop what ur doing!
Even though its electricity basics, I appreciate the way you dumb it down to the point a 5yr old can understand it. Especially since theres no way of knowing who your audience is. You teach it like your introducing us to the concept of electricity
I would love to sit under your mentorship. Was watching your class on temperature consideration for over-current protection and it brought it all together. Thank you Dave.
Perfect lesson again. I got to test circuit breakers using huge, Frankenstein-like test sets with 6" diameter knobs., analog and digital meters and timers. What a BLAST!! The three basic tests were long time, short time and instantaneous to determine how well the circuit breakers performed under actual load. The first test set was the transformer/controller that we fed with 480 single phase which dropped it down to a very low voltage C clamping large cables to each breaker phase then applied current to each until the breaker tripped. Instantaneous (depending on the test curve of each size, type, brand...) was about 10 times the breaker rating, short time was about 5 and long time was around twice the breaker rating.
Making things clear and simple. You didn't impress me with knowledge, but with the way You explain matter. That is a very rare talent. Even if I know all your lessons well, your interpretation makes them refreshing. TY for excellent experience.
I saw your video, it is nice to see how it is explain, I remember long time ago when I have to master a Power system of a very Complicated Big Power Plant, Transmission and Distribution Line when there are different kind of Load for Commercial and Industrial costumer. Before we have the Westinghouse Books now we got software to solve this problem.
One note aside, Ground Faults, in most cases, are short circuits from Hot to Ground but it doesn't necessarily has to be the case. You could for example have a device with high resistance deviate the current from Hot to Ground, therefore, the current flowing in the Hot will be different from the current flowing in the Neutral. This device can be your body, and when you have GFCI protection, the GFCI measures the imbalance between Hot and Neutral, this imbalance can be in the micro amperes, but that will be enough to trip the GFCI. This of course is also aplicable in 3-phase circuits. For instance, very often a ground fault in a motor is not a short circuit, rather, the insulation starting to go bad and allowing minimal current to jump from the windings to the case.
Dave, I recently discovered your videos. Outstanding job explaining and very helpful illustrations. Thank you, I hope you continue to post more content.
Good example with ground fault. But I would always give two ground fault examples. One like yours where the fault goes to the ground wire. And another where the ground fault goes to the dirt/earth/water and doesn’t touch the ground wire. Then I would explain that both types will trip gfci. This gets people to think and realize that the gfci device can sense a fault where the ground wire is not involved at all. This way people can understand that gfci works correctly on a circuit that has no earth ground.
His example of ground fault tripping was showing a fault on the supply lines. That would indeed trip a gfci circuit breaker; but it would not trip a gfci outlet. Since most houses use gfci outlets and not gfci breakers the example shown is misleading. Otherwise a very good video with much good information. Well done.
your an excellent instructor that i have ever seen , good job and keep working , you make the information to enter my head as fast as the short circuit interrupting happens 😂😂♥
you have a talent for explaining this stuff. It can be hard to grasp especially if someone is boring and monotone. The dynamic explanations were helpful to me. Thank you ~sub'd
Thanks for all the helpful information, as you go it would be great to get an in-depth understanding of the geothermal and how to get it in various environments from west coast to east coast!
This video Answers some Questions. But, it also creates lots of other Questions ???? So many Questions to ask about Electricity ?? Such as Why do some 3 Phase pieces of equipment need a Neutral and others do not ?? I have noticed that equipment with an Element do use a Neutral. this might be some of the reason for the feedback current ( Neutral wire ) Definitely a very interesting channel worth Subscribing to 👍
Over current can occur from improper sized wiring to a load. I do hvac. Say your a.c max Amp is 50 but you have wire rated for 30 Amp there will be a overcurrent. Breaker will trip.
hi sir, this video is very helpful for me... thanks for your quality video... I have one request that make a video about Auto-reclose protection with full explanation...
![Jack Harlow - Hello Miss Johnson [Official Music Video]](http://i.ytimg.com/vi/Q86_nlRoIGw/mqdefault.jpg)
You have a gift for simplifying complex information and communicating it in a humble way. Keep up the great work 👍.
well said lol. good teaching and you can tell he wants to help and has the attitude for it.
The clarity in this man's explanation is second to none
The importance for ppl Like you who oversimplify everything is very much needed . thank u
This guy is such a WONDERFUL Teacher !!! Love You Dave .
State of Michigan journeyman electrician here: thank you for helping me understand that a little more. 🙏
As many of the viewers who have commented, I am also an engineer and have been at work for over 50 years and still working. Dave is a unique individual. He can present education clearly. I enjoy his videos as a learning and refreshing program.
One of the best explanations of the types of OC I've ever seen. Bravo.
There's simply no other explanation better than this. No big terms, concise, brilliant examples, etc.
I came across your presentations by chance while boning up for an upcoming interview. It takes me back 30 years to when I was in tech college where we had two brilliant lecturers, Elwyn John - electronics & Mike something the electrical guy. Like you they both had the same clarity of presentation, free of waffle, not bogged down in too much math where it is not neccessary, concise & engaging. Well done!
Thank you. I needed that refresher. I plan on going back to school for electronics. I haven't practiced electronics in over 20 years.
Subscribed. I have been in the electronics biz since 1984 and you sir are someone I could watch for hours. I was blessed enough to have my high school and college professors teach well and convey the rules and laws clearly.
I would put you at the top of the heap. Thanks for making fine videos.
Sir, I appreciate the time you put into these videos.You are Definitely one of the best out here.
Thanks for another excellent video, Dave. Years ago an old timer explained to me, basically the circuit breaker's job is to protect the wiring/equipment, the GFCI's is to protect you!
Powerline Technician student here; I have been looking for a way to wrap my mind around the concepts. How I phrase it to myself is to "Dumb it down" to myself. This helped me so much as I am going into 3-phase and still had to figure out the basics, not just remember the formulas, etc. Thank you so much. I am going to keep watching a your content instead of Karen videos.
Thank you so much. You certainly helped a lay person such as I who is not of the electrical profession to understand the nature of overload and faults that result in overcurrent. You mark out the differences so very clearly.
Dave is such a great teacher. I love his vids.
You're saving my ass in electrical school. You're the best teacher, seriously. Thank you
i hope i have teacher like you when i am young..
Great job explaining! you hit important points without talking about unrelated things or rambling. Also very engaging energy!
If I am going to listen to someone go in depth in extremely technical subject matter,I must like the person & their voice can't annoy me,this guy ticks all the boxes and holds my attention,love these videos.❤️⚡⚡
Everybody in construction should be watching your videos.
Love his videos! 3rd year Union apprentice here and I come running to his videos they just make so much sense!
You are such a great teacher. Your explanation is very clear and understandable. Thank you.
Wow. Like so many have commented, this man is a gifted educator.
you are one of the best tutors. I am satisfy with the way you explain everything in details. best explanation ever!
This video is such a gem, every instructor should share this with their students. Good job.
You are better than channels with 10x the budget.
Great refresher video. Getting ready to train a new employee. Sometimes putting to words what you already know is tough. This was a great explanation.
I don’t know why, but watching this video gave me a eureka moment. The reason an inductor can overload when there is LESS voltage is because the inductive reactance is less causing less impedance! And lower impedance means MORE current!!!! Holy shit! And that’s why dimmers aren’t suppose to be used in fans! Because they increase the resistance of the circuit which causes less current and the less current results in LOWER impedance and the lower impedance causes more current! Holy shit I am so happy it clicked!!!! I don’t know why which this specific video man but u are awesome! Im like level 4 nec but this always puzzled me and none of my instructors could make this link for me! Don’t stop what ur doing!
the way that you simplify concepts amazes me
thank you so mush
Even though its electricity basics, I appreciate the way you dumb it down to the point a 5yr old can understand it. Especially since theres no way of knowing who your audience is. You teach it like your introducing us to the concept of electricity
I would love to sit under your mentorship. Was watching your class on temperature consideration for over-current protection and it brought it all together. Thank you Dave.
Perfect lesson again. I got to test circuit breakers using huge, Frankenstein-like test sets with 6" diameter knobs., analog and digital meters and timers. What a BLAST!! The three basic tests were long time, short time and instantaneous to determine how well the circuit breakers performed under actual load. The first test set was the transformer/controller that we fed with 480 single phase which dropped it down to a very low voltage C clamping large cables to each breaker phase then applied current to each until the breaker tripped. Instantaneous (depending on the test curve of each size, type, brand...) was about 10 times the breaker rating, short time was about 5 and long time was around twice the breaker rating.
Thanks for the video! This helped me identify and understand that I had a ground fault in my system that was leading to an overcurrent.
Great teacher and a great level of understanding , thank you for these
Sir! You are great at what you do. Very clear and concise.
Thank you sir for teaching me electrical principles I find them to be so helpful down here in Malindi Kenya.i will crave for more,thank you sir.
Making things clear and simple. You didn't impress me with knowledge, but with the way You explain matter. That is a very rare talent. Even if I know all your lessons well, your interpretation makes them refreshing. TY for excellent experience.
I saw your video, it is nice to see how it is explain, I remember long time ago when I have to master a Power system of a very
Complicated Big Power Plant, Transmission and Distribution Line when there are different kind of Load for Commercial and
Industrial costumer. Before we have the Westinghouse Books now we got software to solve this problem.
One note aside, Ground Faults, in most cases, are short circuits from Hot to Ground but it doesn't necessarily has to be the case. You could for example have a device with high resistance deviate the current from Hot to Ground, therefore, the current flowing in the Hot will be different from the current flowing in the Neutral. This device can be your body, and when you have GFCI protection, the GFCI measures the imbalance between Hot and Neutral, this imbalance can be in the micro amperes, but that will be enough to trip the GFCI.
This of course is also aplicable in 3-phase circuits. For instance, very often a ground fault in a motor is not a short circuit, rather, the insulation starting to go bad and allowing minimal current to jump from the windings to the case.
You're a sure master of your arts. Feed me more and more. Thanks for the awesome presentation.
I'm an engineer constantly learning and re-learning. You're spot on here mate. Good to listen to your presentation. 👍
Hey there Engineer.
Thank you Steven Gerrard
Broe😂😂😂😂😂😂
Dave, I recently discovered your videos. Outstanding job explaining and very helpful illustrations. Thank you, I hope you continue to post more content.
I appreciate your succinct explanation. It will assist me in finding an electrical defect in my driver's side indicator light circuit. Thank You.
Thank you for this video! I wish I had this from back when I was studying these concepts in Uni. Well done sir! 👏🏽
Well made video, i think this simplify things to total amateurs and even some professionals
teaching and explaining is really your talent.
Good example with ground fault. But I would always give two ground fault examples. One like yours where the fault goes to the ground wire. And another where the ground fault goes to the dirt/earth/water and doesn’t touch the ground wire. Then I would explain that both types will trip gfci. This gets people to think and realize that the gfci device can sense a fault where the ground wire is not involved at all. This way people can understand that gfci works correctly on a circuit that has no earth ground.
His example of ground fault tripping was showing a fault on the supply lines. That would indeed trip a gfci circuit breaker; but it would not trip a gfci outlet. Since most houses use gfci outlets and not gfci breakers the example shown is misleading.
Otherwise a very good video with much good information. Well done.
I just came by your video, and I'ld say you did a good job in explaining the concepts. I hope to see more of your videos.
Thank you 😊
Dave your videos are some of the best! Can you do a series on motors PLEASE!!!
The world's best teacher thanks
Thank u, way easier to understand it this way
nice video gretings from Guatemala hugs for you thanks for share
Masterful presentation with critical eye-opening insights!
your an excellent instructor that i have ever seen , good job and keep working , you make the information to enter my head as fast as the short circuit interrupting happens 😂😂♥
Hey, Electrical engineering student here! Love your video explanation! Pax Vobiscum.
you have a talent for explaining this stuff. It can be hard to grasp especially if someone is boring and monotone. The dynamic explanations were helpful to me. Thank you ~sub'd
excellent explanation in a simple way, very well done sir
Best explanation I've seen in my life🙏
Thanks for all the helpful information, as you go it would be great to get an in-depth understanding of the geothermal and how to get it in various environments from west coast to east coast!
If only my teacher's could teach like this it would have been awesome 👍..
wow, this is outstanding, i now dislike 'short circuit' as compared to 'ground fault' because 'ground fault' is a more accurate way to describe it
Jeez Louise, thank you SO much for this video
Great video! 👍more people need to watch this.
I loved the way you distinguished between overload and short-circuit
your videos very helpful .outstanding explaining..thank you
Really amazing stuff!
Thank you sir for the clear details and information God bless you
Great having the basics clarified. Thanks
Nearly 7 minutes was enough for me to absorb all what he said ❤❤❤❤
Very impormative video, Tnx for sharing Sir
Fantastic video, great explanations and very well presented. Really appreciate it.
Wow, fantastic breakdown!!! Thank you sir
Dave, this is a great way to explain. ! Keep it up.
Well explained and clarified. I really appreciate it. Thank you.
I just discover your channel. Excellent presentation and explanation. Please make more
Very helpfull explanation. Is it possible to see a video of the relation between an LSIG breaker and the types of overcurrent? Thanks for the video!
This video Answers some Questions.
But, it also creates lots of other Questions ????
So many Questions to ask about Electricity ??
Such as Why do some 3 Phase pieces of equipment need a Neutral and others do not ??
I have noticed that equipment with an Element do use a Neutral. this might be some of the reason for the feedback current ( Neutral wire )
Definitely a very interesting channel worth Subscribing to 👍
Sorry what do u mean by Element? Is it resistive loads?
Wonderful explanation!!! Sending love from the UK
Thank for illustration and very comprehensive discussion
Thankyou, you’ve really simplified what I needed to and understand for my final exam :)
Louise
You must be a teacher. Great video man 👍
Fantastic instructor.
Thank you for sharing your knowledge, sir.
Currently in trade school your videos are helpful
Thanks. You're a good Teacher. I'm subscribing to ur channel so I don't miss ur posted videos
this man is GREAT
Thank you. This was a very good explanation.
Over current can occur from improper sized wiring to a load. I do hvac. Say your a.c max Amp is 50 but you have wire rated for 30 Amp there will be a overcurrent. Breaker will trip.
Way better than what I'm currently paying for....
Very nice, enlightening 💡, no short circuit ! 👌
such a good explanation! hope these things was explained like this when i was at school :). thanks a lot for this video sir.
Extremely clear
hi sir, this video is very helpful for me... thanks for your quality video... I have one request that make a video about Auto-reclose protection with full explanation...
Please explain superconduct, quicken, spread, aggravate, electro-charged and hyperbloom too.
He is agood teacher he specifies every point
Properly explained. Thank you sir.
Very well explained. Keep up the good work!