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.
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.
Dave, I recently discovered your videos. Outstanding job explaining and very helpful illustrations. Thank you, I hope you continue to post more content.
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 😂😂♥
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!
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.
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.
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
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...
I have seen many industrial panels where there is a power distribution block with many taps. Up stream it may be protected by a 150 amp breaker, but the tap conductors at the power distribution block may be a 30 amp wire that goes to a VFD or mechanical starter. Is this a problem?
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.
Fantastic presentation! How would you go about addressing neutral to earth voltage coming from the utility side and leaking into the homeowners panel and distribution system?
Id call up the providers and tell them to get there ass out here and fix there fire and safety hazards, chances are the 3 phase system outside your house is unbalanced. If it was balanced V on E to N would be 0. As the phase are not balanced you get the unbalanced voltage (and potentially current) between N and E. Call up the ppl who manage your network outside they will come fix it. 15min job, they will just re-balance the phases
Quick question... Could one drop a 2013 digital camera(Canon hotshot)... And the resulting drop/damage, result in a malfunction where the camera goes into a continous "foto-snap" mode, until the battery dies??
Sir, if you could go one step ahead & talk about sizing a breaker to the load to protect against overload? Overloads unlike short-circuits are “analog” which are “digital” & the breaker has a much easier time dealing with SC rather than OL. If the breaker is sized on the lower end, it may cause spurious tripping, if too high then an OL may even cause the cable to melt & a fire may result. It is also important to anticipate the “type” of OL & which & how it might make sense such as due to excess mechanical loads or partial short-circuits.
Still don't understand how there's generally no potential when us or a tree touches the neutral wire if it's the return path of the same volts/amps of the hotleg that DOES shock us.
