Earth Electrode Testing

V nice sir good explain

What is the angle between other two electrodes

Thank you for your video. Very informative and helpful.

What's the purpose of moving the earth spikes please?

If u use a earth grid or earth tape how far do they need to be in the earth?

It should be noted TT earth impedance can easily double from wet months to dry months throughout the year, I guess that why <100 ohms figure mentioned rather than the 200 stated in the book! using a grid (rebar) in concrete is not advisable. also electrodes should never be sunk close to PME connected services, DNO's recommend a minimum of 10M from their earths, but there is little guidance on this subject anywhere! rods should not be sunk close to foundations as it will reduce its effectiveness, rule of thumb is at least 1m unless you know the foundations are shallow.

What do you do when you have the earth rod to test surrounded by concrete slab, where do you put the test probes with the spikes? Thanks for the vid 🤗

You done a great job thank you so much. Very useful for me.

Thank you for this video sir.it's my first time working in earthing and im looking for some info.and im found yours.thanks.

Super

Thank you for your time to teach. You make understanding simple. Thank you Sir!

Wrong middle lead is 62% of long leads distance

bare mumble

Great video, though you could have mentioned that the middle electrode (commonly designated as S) is just a high impedance voltage measuring probe, while the outer probes (commonly designated as E (earth) and H(auxiliary)) are used to inject AC current into the soil. Resistance is calculated internally as the voltage measured at the S-probe divided by the current measured internally by the instrument itself.

thanks a lot sir

good vid, but slightly confused, putting aside the 10:1 rule surely connecting multiple rods to a soil with poor conductivity even if they are inches apart will gain more surface area, hence better figures. Im guessing that surface area plays a big role here

I am unclear why the electrodes need to be far apart yet tape or a grid or a pipe are considered the same thing. They are not only Not Far Apart but continuous?

Thsnks

For real , thank you sir

Great video very helpful

Save the environment by writing on both sides of the paper or use a tablet!

What shall be the earth electrode resistance

I am building my home in Thailand, realising early on that there is no electrical standard and very little knowledge of Earthing, I decided to use an UFER grounding system. All my rebar is connected together, by welding and thick copper/brass cable joints, then concrete is poured and metal points at 4 corners of each building come out and all the risers and are connected above the floor plane to a common point by copper cables, all dry, sheltered and protected. For anti corrosion I smuggled in a tin of Copperease (can't get that here along with Marmite and PG Tips) as we used to use that on ships' antennae installations, it doesn't wash off or emollify much. I use a Three Terminal Ying Tong Meter as above and thank you for your video as when I got it the bloody thing the destructions were all in Chinese. For the whole installation therefore I use multiple earths for each supply box being the UFER grounds, as the company supply earth isn't available (LN only) and anyway it's just a piece of galvanised metal buried in dry sand. Drinks are on me if you are ever in Hua Hin area.

How can you test an earth electrode if you can not find it because it's Hiden under a deck or something please ?

Really informative videos. Be great to have one on hot tub installations as there's a lot of conflicting information around interpretation of BS7671 special locations, PME, TT systems etc. I'm sure you could guide people through the correct best practice, and I for one would appreciate some expert clarification.

Hey John hope you can help me with the question it reads: A maximum earth resistance of 300 Ω, shall be maintained between electric fence earth electrodes. Do I connect the leads to both electrodes +- 30meters away. Or do I insert the small electrodes into the ground as shown on your video the electrodes are 1.2meter long.

Do you have a reference for the easy method on your videos? I can't find the link despite searching. Thanks.

How to measure the resistance of the grid ? I believe the grid resistance will affect the earth resistance. Please correct me if I'm wrong

I find it always best to use a 17th or 18th edition multi function tester to measure the Ra or earth fault loop impedance for the means of earthing. The three spike testers will not measure the critical loop to ensure automatic operation of the RCD's. They can be misunderstood and also show incorrect readings from the short temporary spikes into dryer topsoil rather than deep clay,
Two wire testers will measure the entire earth fault path from the transformer through the line conductor, down the spike to the ground, and across the ground and back to the high voltage earth at the TX. this needs to be below 200 ohms and is the best method by far.
You also need to ensure that you disconnect the earthing conductor and test only the means of earthing (NOT parallel paths to heating systems and water mains etc.) You MUST also ensure that this test is done with ALL current using equipment turned off at the main switch to ensure nobody can become injured while the earth has been disconnected.

Nice course i appretiate it good explaination but thats not enough for me you suppose to talk about the soil type as well and the great ground résistance value for in low voltage and Médium voltage

Thank you so much sir for your rich information and simple gorgeous way in explaining the lecture, appreciate your help and effort making the information so simple and approachable, from kuwait ali

That sun looking cool

Hi this is great because it gives me ideas of how to achieve my goal, but I would like to know more about the meter you’re using I have been told I need to use a mega but this looks like something else you have but you did not mention what it was. I use Radio and I need to know I have a resistance of less than 10 ohms. This sends current, and I am afraid to test as I may damage my equipment. 🤔. This demonstration 👍 just need to know more.

Just shit

Good.

This is deeper knowledge. We greatful

So how do you do this without special testers? Seems like you could

Thankyou sir

I am trying to find the video for the first method of earth testing when power is available, cannot find it ?

Thanks A lot John! very clear and the explanation is straight to the point !

229 dislikes. Arrest former CEO Susan for protecting corporations.

I have concrete ground 😢

I could not find your video about measuring earth resistance when the main electricity is available, and ask my question here
Can one get results using any household electric appliance like, say, Incandescent light bulb, a mulimeter and the old good Ohm's Law?
One terminal of the bulb is connected to live, the other to earth and the current is measured. Divide voltage by current and subtruct the bulb's resistance and the result is the earth resistance.

so if we have well of earth 40m and electrode of 3m distance of t1 400 m

I like and Englihs and spanish type bilingue okey...!

Quiero que se explique en español por favor..

Im wondering which direction you would go away from the original earth stake. If i had a new overhead pole put in for my new supply (I'm very out in the sticks) would I be advised to head towards the pole which happens to be in the same direction of an overhead transformer for me and a neighbour on the next farm.
The new supply is PME but the estimator guy said to put an earth stake in with a 25mm CPC connection to it. Never had that request before in my youger days of new house etc.

As always very clearly explained.

What about if it’s not a sunny day 🌞

Today our sun 🌞 very nice