How to do earth electrode resistance test/ and reduce resistance to earth
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- เผยแพร่เมื่อ 2 พ.ย. 2022
- This video is a demonstration of two important aspects of electrical earthing.
1. How to test for earth electrode resistance to earth with an earth tester.
2. how to improve(reduce) the earth electrode resistance to earth.
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/ @obloni_electrical
I love your explanation, very easy and straightforward
Thanks
I'm here again. Thanks for sharing it with us
Thank you, great video
Very useful demo. My humble suggestion:
For multiple rods the minimum spacing distance should be twice or more that of the depth, to overcome zone of influence effect. Eg: if the depth of one rod is 1.5m then the parallel rod should be placed 3m away.
Then current spike should be placed at a minimum distance of 8 to 10 times the depth. Suppose rod is 1.5 meter depth then current spike distance to be at least 15m away in order to avoid influence. For array the diagonal is taken as depth for calculations. These are thumb rules we follow here in India for Fall of potential method. Thanks.
Thanks for your contribution sir.
Nice one, very educative.
Can the 2oanh cover up to 40room hotel I need ur help
Good job
Good work my dear
What is name of the chemical used to treat the soil around the electrol
Please what should be the distance from the main rod to the second rod.
Good you choose 500V, which will also save thermistor if present. Here in India line to line is 415V and theoretically we have to inject 1000V. But to be on safer side we use only 500V practically.
Nice Tutorial I love your explanations keep it up sir
Thanks bro.
Please what value are we expecting in the testing.
What chemical is use to treat the soil and how is it done
How much for an electrode resistance tester in your country? I also had an interest as well.
Thanks. Very elaborate tutorial.
Thanks
Thank you so much for your session,it is clear and helpful. BTW would you like to tell me how to measure the resistance once the installation is complete? bref ,should I have to disconnect the cable from the building or I have to test while the cable is connected.thank you
Yeah, ideally the cable should be disconnected before the test.
nice video click. thank you
Thank you for your video class .but I was once told that earth resistance test should be less than 0.5oh down is a good homic value.
Sure, if you get 0.5Ohm that's great. In this type of test, the lower the resistance value, the beter
What is the required minimum reading
Thank you, sir. Please can multimeter be used for the testing?
No please
Thank you sir for the lesson, my question is not related to this topic though. The question is, what could cause light bulb to still give light when you put the switch off? In this case, the illumination becomes low, compared to when the switch is on? What could be the problem pls?
Alright Seth, so there are two things:
1. Most of the time it has to do with the quality of the LED light. Poor quality LED lights behave like that.
2. Problem with the electrical circuit.
*Make sure the neutral is NOT used as the switch wire
**That could also happen as a result of small pick-up of electricity from a cable running along the LED light cables due to electromagnetic induction (we say leakage in simple terms)
Note:
*If you are not sure of the quality of your LED light (s) , replacing them with quality ones could solve the problem.
If you are very sure you are using high quality LED lights and the problem is still there, then check the circuit (wiring) as I indicated above.
Good morning
Please I want to know for the third rod are you extending the cable from the main rod or the second rod to the rod?
Thanks
From the second rod please.
I did installation of earth once. From my understanding, the earth system depends on the sizes of the building, e.g, factory or house, etc.
For me, i would prefer to put all the 3 rods in a hole. Build a chamber and create a square shape one terminal lead outside for all 3 rods. That was what I did in my last earth installation.
Sir, i love your output explanation. Reducing the resistance on earth it means the building is not that so BIG?.
Good job again. Please:
1. What is the standard measurement for the resistance or threshold (I can see that yours is above 6ohms but less than 7ohms [6.4ohms])?
2. What is size for the cable that would be used in connecting the earth rod to the house?
3. How do you determine the length of the rod to use, i.e., is there a way of determining how long the rod (which is buried in the ground/soil) should be beforehand?
Well. There is an acceptable range but it differs from one jurisdiction to another. You have to refer to the electrical code of your country.
Meanwhile, the lower the resistance to earth the better. You can even get as low as below 1ohm depending on the area and the type of soil
Please contact me through WhatsApp. +2339323669
Refer to the electrical code of your country.
Meanwhile, in most cases it should be of the same size as the supply cables
It depends on the water table of the area.
@@obloni_Electrical Exlent my dear which country you Available
@@yahayamasanja1849 Earthing system design is based on results obtained from Wenner's 4 pole soil testing method.
But as thumb rule we in India use 32 dia (nominal bore) GI pipe buried to a depth of 2.5 meter. This holds good for normal soil. The final result/value should be 5 or below.
During summer pit has to be wetted by pouring water. This reduces the resistance. Here the earthing system is TT. We use RCCB for leakage fault.
Mcb/fuse takes care of shorts and overloads. Hope this helps.
And also exchoose I want to now when the reading 6.4 ohms is good or bad
The supply authority earthing system is TT but I am using an Rcd (main) so it's okay
What if the resistance is not good enough, what are the symptoms? Does the current get low once put load?
In case there's a leakage in the circuit, you will pay more electricy Bill and a small leakage can also cause electrical shock etc.
Good morning instructor, please what is the deght of earth rod.
please use this link th-cam.com/video/Kp0a3jFHjiE/w-d-xo.html for a detailed explanation to your question. thanks th-cam.com/video/Kp0a3jFHjiE/w-d-xo.html
Which instrument did you use for the test
Earth resistance tester
Please always try to list your tools, brand and their model what you are using in the video at comment section so if we have wanna buy it, it can be easy for us
Noted
@@obloni_Electrical Thanks
@@obloni_Electrical Thanks for your response
This is wonderful my lecturer, can I still use multimeter to test earth resistance?
A multimeter can be used to perform certain types of earthing tests in a residential setting, but it's not ideal for measuring actual earth resistance.
This is helpful and education I'm going to encourage my fellow students to subscribe to this channel
@@noxmayondi6135
Wow! That's great to hear. Thanks
Gostei
What are the significance of performing earth test
Yeah, you will get it clear from my videos on earthing. Use these links:
th-cam.com/video/wWO2Z-gm-HA/w-d-xo.htmlsi=firyiskWsvbWbcNR
th-cam.com/video/Njr3LXOyEyI/w-d-xo.htmlsi=BBPKT-113blb7xYD
th-cam.com/video/Kp0a3jFHjiE/w-d-xo.htmlsi=t8s4ZJ81_vQ8SG_Y
th-cam.com/video/QQ4leh3wXso/w-d-xo.htmlsi=otp0O0WoQQ7DkYqE
What is the normal ohms for earthing a residential home??
it depends on several factors and there isn't a single "one size fits all" answer.
1. Local regulations: Different countries and regions have their own specific regulations governing minimum earth resistance values for electrical installations. These regulations often define the required range, sometimes referencing 5 ohms but not always.
2. Soil conditions: The conductivity of the soil where the earth/grounding electrode is installed significantly impacts resistance. Dry, rocky soil offers higher resistance than moist, clay-rich soil.
All these factors will affect what you will call "normal ohms for earthing a residential home??" in a particular location.
here are some general guidelines:
Many countries and regions set a maximum allowable resistance, often ranging from 5 ohms to 25 ohms for residential buildings. However, lower values are always preferred for enhanced safety.
Find the relevant electrical code or standard applicable in your area to determine the required earthing resistance value that is acceptable in your country/region
If you are in Ghana, you can contact me for assistance. WhatsApp +233242809918
@@obloni_Electrical
Im not in ghana
I wish u have tutorials online not only on youtube.
Where we can interact with on video
@@JerryMartins-vh9vc
Good idea. So I will plan and schedule a time for that. Thanks 👍
Good stuff my brother, but you need a new tester.
Thanks Anthony,
Dear the size of the Rod that is connect to green cable. What is?
@@waldirgavela please do you mean the length or the cros-sectional area?
How can i get that insulatio resistance tester sir
Please which country?
Kenya
Does it serve you better
@@engineermwaruwa.-mc3yy oh oh okay, you can get some at a local electrical shop. Though they are not common. You can also try shopping online.
@@engineermwaruwa.-mc3yy
Sure, but there are equally better or even more better brands in terms of durability and robustness. Prices also vary from brand to brand.
Can someone use multimeter for the test?
Lol! No please
So that can reduce the speed of a meter
if there is a leakage in the wiring and the earthing is bad, your meter will read more. until there is a leakage in the wiring, earthing does not play a role in how your meter works
Hi 👋 brother wher r u we want work with u
Please contact me on WhatsApp at +233242809918
It's worth trying, but then I will not obtain positive results.
Can the 2oanh cover up to 40room hotel I need ur help
What is the required minimum reading
Can the 2oanh cover up to 40room hotel I need ur help
Can the 2oanh cover up to 40room hotel I need ur help
What is the required minimum reading
Can the 2oanh cover up to 40room hotel I need ur help
Please I don't understand what you mean. Kindly make your question more clear. Thanks
What is the required minimum reading
That depends highly on what the Electrical code of your local jurisdiction(or country) says. The IEE regulation says anything below 200 Ohms is okay. But Practically, you should be looking for a reading below 10 Ohms. with RCD protection (in a TT system).
Note: the lower the better. if you can get 0.0 ...value that would be great.