Thank yo sir❤finally in age 40 my life i had have chance to understand it correctly!.I very much appreciate your comprehensive but simple explanation ❤❤🙏🙏🙏🙏🙏

Great video thank you so much

very good explanation!

This video is very helpful to a lot of people to understand the grounding circuit concept and I am sure will save their levies. Thank you

Your style and method of explanation are more than excellent. 🌹Thank you, sir. 👍

You are a great teacher thanks

A great video with all the build ups,basic  theorys are not left as if they are understood which is very very important. One thing though, The ground wire, is not mentioned here, the 0.001 ohm, path way is understood to be the ground wire going from the equipment body directly to the grounded side( lower, neutral) wire and bonded at the main ckt board.

Best explanation I found on YouTube!!!

Bob is the best!

A great video with all the build ups,basic  theorys are not left as if they are understood which is very very important. One thing though, The ground wire, is not mentioned here, which is the the 0.001 ohm return path to source at the main ckt board, there it is bonded to the neutral, necessitating, a 3rd wire called ground wire, for the fault to have a least resistence path way back to the source.

I love ur videos and they actually educated me and changed me for the better but just when I thought I had it figured out then this video confused me so bad because I thought voltage stayed the same I’m parallel circuits and if someone touched the metallic box then it seems that they would be in parallel and voltages the same on the person that touched it so I hope u explain somday

The best teacher by far....Great job bob.i am waiting for IT classes soon please

That means CURRENT has to return back to the same battery where it's coming from.
It cannot flow to the other group terminal of another battery even if it's if the same voltage.

Hi Bob, took a while to track you down since the rebrand, your videos were a great help when retraining in electronics. Not sure if my patreon sub is still active !

I’m trying to track down your video explaining how birds could safely land on electrical wires - is it still on here somewhere?

Nicely explained (as always). However, if grounding is considered adequate, why are GFCIs needed?

I guess the point is that if an appliance is not grounded, a short from live to chassis may not be discovered for a while, and one day someone would discover the problem by getting hurt.    If the chassis was wired to ground, the problem would manifest itself by the ground fault protector tripping...

this is why you need calculations to understand electricity.  Its the voltage divider that brings the voltage down to a level to have minimal current go to the person.   Its not like you are diverting current to ground rather than a person.   Voltage division.

10:09 i fail to understand why current will not flow id we just touch the hot wire and are grounded. I would assume that if we are coonected to ground there is a voltage difference between hot and ground and electricity should flow through us to ground as if that wrere a close circuit. But the explanation makes ir sound obvious that electricty canno flow unless the main circuit closes, closing with ground is not a viable option?  But the video was so helpful. The final part of the parallel circuit where the path to ground is so low resistence that it saves the day was really good.

That reminds me on a situation I had with a Pinball machine. It was near a swimming pool and people where coming there into the bar, bare feet and wet on stone tiles to play Pinball. I was very keen to check the grounding, especially from tho lock plate that is made of metal. So first I testet if the wall socket is correctly grounded then I checked if the Pinball machine's lock plate is connected to ground. It was. But... when I slide my finger on the lock plate I still can feel something like a tickling on my finger. Why?

UK Electrician here. I've watched loads of your electronics videos and learned a lot with thanks 👍 I'm going to be bold and say that from my viewpoint as an Electrician you're a bit mixed up here. I can see that in the first instant, as you explained, that under earth fault conditions that 'earthing' as UK Sparks call it does minimise the fault voltage that we may be subject to. But that's not the real point. The point is to clear the fault by having the protective device protecting the circuit operate (you did touch on this to be fair).  The Electrician will measure the 'earth fault loop impedance' and make sure it is sufficiently low enough to develop a high level of fault current (sounds counter-intuitive) under earth fault conditions in order that the fuse or circuit breaker will disconnect within the required time in response to the heat (fuse) or magnetism also (circuit breaker) generated by the fault current. This is generally set at 0.4 Sec in UK. A low resistance earth fault path produces a high earth fault current (Ohms law I=V/R) and thus a quick disconnection time. I agree what you said applies to that first 0.4 Sec but it's not really the objective. The point of earthing is disconnection under fault conditions. We also verify the 'earth bond' in equipment to ensure that will play its part. I'm sure all of this goes the same or similar for US Electricians. I don't doubt your expertise in the other material and apologies for being such an upstart in speaking up. A man of Science like yourself will forgive me I'm sure 👍