Near the beginning of the video you indicated that just because a plug does not have a ground connector, the circuit may still be connected to ground. It's important for people to understand that in almost all residential homes, The ground and neutral are tied together. In that situation, the two prong power cord may still be providing earth ground to the circuit.
@Ove_Bjerknes
3 жыл бұрын
The best explaing video regards to probing and earth ground i have ever seen. Thanks!
@brandontcrow
5 жыл бұрын
I appreciate this video and your teaching style! Very thorough and calmly spoken, yet not boring. AND you've got a ton of videos, so you're a great resource. Thanks!
@elliottblaine9108
3 жыл бұрын
i know Im asking randomly but does any of you know of a method to log back into an Instagram account?? I was stupid lost my password. I would appreciate any tricks you can offer me.
@brunoaugust9102
3 жыл бұрын
@Elliott Blaine instablaster :)
@elliottblaine9108
3 жыл бұрын
@Bruno August i really appreciate your reply. I found the site through google and I'm waiting for the hacking stuff atm. Seems to take a while so I will reply here later with my results.
@elliottblaine9108
3 жыл бұрын
@Bruno August it did the trick and I actually got access to my account again. I am so happy! Thank you so much you saved my ass !
@brunoaugust9102
3 жыл бұрын
@Elliott Blaine glad I could help :D
@billjon2732
4 жыл бұрын
You cleared up so much for beginners. It was simply put thanks man
@cookieboi4449
4 жыл бұрын
In Australia, we have 240 v grid supply. We use a MEN (Multiple Earth Neutral) system, The Neutral which comes into the house is a ground return stake buried deep into the ground every 300 metres or so. This Neutral (common ground) is connected in the meter box to a local house ground, which is a copper stake hammered into the ground. In case of a Neutral link burned out, we have the local ground as a safety measure. We use RCD's (in the USA GFCI's) which has a Neutral and an Active (hot) connection in and out, and from this gadget to any household power point. In case of a leak to ground, there will be a difference between the Neutral and the Active (hot) and the RCD (GFCI) will trip at 15 mA and within say 10 ms. I believe this system is also used in the USA, but perhaps not being compulsory,,, maybe not a lot of people are aware of this system.. Please comment and stay safe.
@ChrisWilliams-pu8pj
2 ай бұрын
Excellent video. Let me know exactly what I was looking for. Thank you!
@educationaltechnology8363
3 жыл бұрын
wow Very informative you Just deciphered so much of my myths. one session with a wise man worths more than reading a book. much appreciated
@dawkinsm
2 жыл бұрын
Great video. Thankyou. Love the hairdryer and shower analogy. As you say, don’t be that person 🤣
@user-xq7xe7ix5w
6 ай бұрын
Awesome! as usual.
@Pootycat8359
Жыл бұрын
Whenever you use a hair-dryer in the shower, it's advisable to wear rubber gloves :).
@stephanefernique9140
Жыл бұрын
remember when James Bond throws a fan into the villain's bath( against DrNO) ah ah ah
@Pootycat8359
Жыл бұрын
You know about those "ground adapters," for connecting a 3-prong plug to a 2 contact outlet, and how you're supposed to connect the green wire to a ground? When I worked as a radio/tv engineer for K***-TV (I omit the 3 letters , to protect the guilty, lest an agent of OSHA should read this), we used to call those adapters "ground busters," which enabled us to use the 465 'scope with its chassis "hot."
@clems6989
Жыл бұрын
Your gnd clip on the probe is earth grounded. When it touches any point in your circuit you are grounding that point.
@rul1175
Жыл бұрын
What about a DC circuit running on a battery. Would you connect the alligator to the negative.???
@bolon8200
4 жыл бұрын
great video simply Put, thank you
@gravestoner2488
3 жыл бұрын
So I suppose running a 1 inch wire from the outlet to the metal outlet box does not qualify as an appropriate earth ground 🤔. I dont want to run ground wires through my 80 year old walls 😢. And I certainly do not want to use my scope in the bathroom which is the only room in the house with a proper earth ground 🤣. I might use one of those 3 prong > 2 prong converters with the ground hanging off and run my own conduit outside into the actual ground 🤣. I'm not crazy leave me alone.
@traditionaltools5080
2 жыл бұрын
I feel that soldering iron example. Recently my tech was soldering on high voltage caps. Turns out they weren't discharged. Oops.
@simplyelectronic4840
2 жыл бұрын
well after the other videos i have watched. this one makes sense.
@johnny7254
Жыл бұрын
I understand and appreciate the point of this video, but one thing is unclear to me. At about 3:55 you discuss cutting off all but the earth ground pin from an old extension cord so that it is safe to probe. Could you explain what we are doing with the resultant measurement?
@tomfenn7149
2 жыл бұрын
Brilliant!
@ziadfawzi
2 жыл бұрын
Thank you so much.
@dhrupadsaha4171
3 жыл бұрын
Thank you Sir 🙏
@RandallDibble
Жыл бұрын
Good Explanation! !
@tux1968
4 жыл бұрын
My power supply earth-ground terminal shows a few ohms resistance to my soldering iron, as expected. But both the positive and negative terminals show 45 MΩ (megaohms) to that same soldering iron -- was hoping they would show as an open loop instead like yours did in this video. Is it fair to say my power supply doesn't have proper isolation from earth ground and my oscilloscope is at risk.. or is 45MΩ enough resistance to protect it?
@simplyput2796
4 жыл бұрын
I assume that's either the actual resistance of "the ground" or your power supply does have some sort of humongous resistor connecting negative to ground just in case. I've seen some diagrams where there is a huge resistor connecting the AC neutral and DC ground on either side of a transformer, too. But 45 megaohm would need 45 kilovolt to produce even 1 milliamp, so just don't let it get hit by lightning and you're fine.
@tux1968
4 жыл бұрын
@@simplyput2796 Thanks for taking the time to answer and put my mind at ease! Cheers
@jdjohnson2131
4 жыл бұрын
Now consider the anti-static safety you are supposed to use, if it is not earth grounded it isn't effective
@retrobrw919
4 жыл бұрын
Anti-static safety equipment typically has(or is supposed to have) a 1 meg ohm resistor in series between the bracelet, mat, etc and earth ground.
@pd1jdw630
5 жыл бұрын
We still have ungrounded wall plugs in the wall here. Europe that is. Funny stuff, grounded wall plugs are in the bathroom and washing room.
@simplyput2796
5 жыл бұрын
That's actually horrifying. Hopefully they at least have some of the fastest-acting fuses in the world so you only die a little bit.
@pd1jdw630
5 жыл бұрын
Simply Put yeah. I’m not really sure how it works outside, ore at least past the main fuse. Which is 36 amps. We do have “fase” (brown) and “zero” (blue) as a single fase 240volts input. And zero being earth potential . About it being really earth I don’t know, cause ground. Here is a green wire with a yellow stripe. And that also grounds out waterline, gas line, heater radiator. But the latter we only have in our bathroom where the shower is, cause that’s code. And where our washing machine is with our central combi gas boiler.
@simplyput2796
5 жыл бұрын
AC works with a "neutral" line at constant potential and a "hot" line that goes above and below the "neutral" line, so I suppose it's not impossible they have your local earth ground connected to the neutral? But not only could they not guarantee that the power company's earth ground is the same as yours even if they were next to each other, they're not and there's a huge resistive path between theirs and yours so you'd have a kilometers-long ground loop. That can't be it. But I can't think of anything else that even begins to explain it.
@pd1jdw630
5 жыл бұрын
Simply Put I’m gonna dig into this. This made me curious now.
@parapos
5 жыл бұрын
the neutral line is connected to ground (yellow-green) 220vac (Europe, Greece) inside the box where the power meter is. from there to each houses physical ground. (usually about 2 meter long poles underground )
@gregsuarez5205
2 жыл бұрын
Can’t see a thing you are doing in your tests with the soldering iron station because your arms are in the way. Have no idea what you are connecting or not connecting. Explanation’s are nice but video could have been less choppy with better visibility of what you are doing.
@robj1646
2 жыл бұрын
After 5 minutes, I totally lost you. Very confusing vid!
@One-Crazy-Cat
Жыл бұрын
Some misstatements here but fairly good information.
@One-Crazy-Cat
Жыл бұрын
Neutral bond can be problematic. As you called out that they were “shorted” together it’s technically a neutral bond so earth is found via neutral.
@damnedattendant2536
4 жыл бұрын
What if I don't connect my oscilloscopes ground (3rd pin in the plug) to the earth ground ....
@simplyput2796
4 жыл бұрын
I would assume it would work fine, but I wouldn't want to guarantee it because oscilloscopes are precise pieces of equipment and might rely on earth ground as a super-stable reference.
@damnedattendant2536
4 жыл бұрын
@@simplyput2796 Thank you for your quick reply ... I thought so too ... Your channel is a great place on youtube .... 😊😊
@cookieboi4449
4 жыл бұрын
My Hantek came with a 2 pin plug, no ground pin. I guess that is because the scope is double isolated, and as such, it is wrong to earth a double isolated electrical equipment. However the scope grid input doesn't show the double isolated sign. I used my own 3 pin plug because I use RCD's (in the USA GFCI's) on all of my circuits,,, and they trip with a leakage of 15 mA in about 10 ms. On the equipment tested at 240 vac I use an isolating transformer.... I would like some comments as what is done in the USA. In Australia, on all new homes it is required to have a safety switch (RCD / GFCI). to eliminate the risk of electrocution. How about the USA ?
@danc2014
2 жыл бұрын
Usa added gfi near water years ago, and now has afi Arc fault interrupt. To all circuits in new homes.
@konradschaubert5520
Жыл бұрын
the editing is horrible with this constant flash switching cutting frames yikes.
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