Earth Fault Loop Impedance Test & Prospective Fault Current Test
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- เผยแพร่เมื่อ 26 พ.ค. 2024
- Trade Skills 4U tutor Andy Summers talks you through earth fault loop impedance and prospective fault current testing. Please note this video is intended as a revision aid only.
I must say I very much appreciate the pace you talk at it gives me just enough time to gather my thoughts. when I learnt this not too long ago it was at a much faster pace and I just had to take note and go over them as I didnt understand it fully
Andy you're an absolute diamond.THANK YOU SO MUCH for taking the time and making the effort to make and post such a BRILLIANT video. Crystal clear step by step explanations throughout. I have my first NICEIC assessment in the morning and this was the one sticking point I was struggling to get my head around, until watching this that is.
This hands down is the best explained video for this aspect of inspection and testing procedures
I will be looking for other related videos on this channel from now on
THANK YOU GUYS
Very clear explanations and voice. A blessing for all foreigners listening.
This is by far the best electrical video explaining how to do Ze and PFC tests. I watched Andys video on transposition of formula and he explained that better than my course tutor. Its a shame you do not do a whole series of testing videos that relate to the AM2 as this is where a lot of apprentices etc struggle. I hope this is something you will do in the future.
An outstanding presentation - clear, concise and utterly understandable; thank you!
My thanks to Tim and Chris for pointing out that the instruction manual requires the test leads on a Kewtech KT63 to be in 2-wire mode when using the high current test mode. In answer to your question Tim about whether previous test results are valid, I've conducted the test many times using both 2 lead and 3 lead configurations on various meters and the results have always been identical. The golden rule though is always follow the manufacturer's instructions so I've given myself a slap on the wrists!
You are sooooooooo briliant teacher that i have seen in my whole life.thank you soooooo much.please share more video.
Fantastick video!!! Very good, very clear, lots of information, high standard. Very helpful. Really good work.👍
Very simply explained video. I'll be sharing to others who I feel will benefit from this video.
I'm always watching your video and now I'm going to to start my first course next month.✌️
An absolutely brilliant video sir.thankyou so much indeed.this helped me out loads.godbless you.
thanks for sharing this knowledge. Its quite a huge and complicated topic.
Dear sir.a most butifully presented video .lovely clear and concise.a superb presentation.takes me back to my tester course.keep up the great videos.steve
I wish you had been my teacher! Calm collective and precise!
37k views and no one has left a comment. Andy - slight surprise that the term meggering is still being used, the onsite guide being referenced in a training session and no main earth terminal notice fitted, but i'm nit picking ! a clear and excellent video.
Brilliantly explained. Thanks for that
A most excellent demo.gentlemen.very helpful indeed.thankyou kindly.
What a brilliant video. Thank you.
Excellent and confident delivery
I've recently realised that the KT63 manual implies that if you use the high current mode, then in all circumstances you have to have the leads in the 2 wire configuration. Your Ze and Zs tests don't do that, but your PSC test does.
From the manual "The high current test mode requires the use of the distribution board lead set ACC063 configured in 2-wire mode". and "For Ze testing at the distribution board or at any point upstream of RCD protection there is a traditional fast high current test mode. The high current mode is a 2-wire test that enables the user to test the true impedance of both the Line-Neutral Loop and the Line-Earth Loop".
I've tested several installation the way you did it with the N lead seperate and got plausible results but I'm now wondering if the results are valid. Any thoughts? Thanks.
Nice pace to this video. Would have been good to mention maybe why it was so important to isolate the CU when carrying out the Ze test. 👍
Clear explanation. Well done. Please do one on Insulation Resistance Test. Thank you.
Very well explained, thanks!
Excellent, clear and very helpful. Thank you!
Very well presented easy to understand thank you
Thanks for the content much appreciated
Brilliant video I feel like I was in the classroom.
That was very well explained 👍
Brilliant explaination
Great clear explanation.
Very nice presentation and easy to follow. How is it possible that doing Zs (at DB) you are able to measure Ze + R1 + R2 with main switch and all breakers in the off position? min 10:08.
hi first of all very polite person very good teaching method I have enjoy learning.
Well explained, Thanks
Best explanation on the web without a doubt.
Thanks for the video!!
thanx very much for the effort.so generous
Thanks for this.
The KT 63 manual says that for high current test, i.e. Ze, the leads should be configured in 2 wire mode. I noted at 7.27, the test was done with 3 wire lead configuration. The manual also states do not use high current test in 3 wire configuration. Also, I noted you used 2 wire config for PSC but 3 wire for PFC. Is there a difference if you use both in 2 wire config? Both are high current so shouldn't they be config in 2 wire according to the manual? Thanks.
Very informative. Thanks
Hi would like to know what is a continuity bonding test and how it is done with a multimeter
Great vid. Very well explained. Thanks for sharing. 🐵
thank you very much for good video.
Great video!! Very helpful
I have no obvious choice for the external earth conductor as 2 leave the back of the board. Assuming I am right one goes down so is the incoming but it is not obvious. There is a Meter on the back of the wall but that just tells me little too. It could still be the up or down and really the meter is level not down.
Should I test each earth one at a time to find the correct one?
Excellent video well presented nice worx
This video is awesome thanks man
really helpful thank you
That is really 'very very excellent'!!! I did get it! Thanks a lot!
Am so thankful for your educative videos
What kind of meter did you use in the Ze and all the other tests pls.
I wanna know the brand and the price. Thank you.
My email is medissali1@gmail.com
The model of the meter used in this video is a KT63, made by Kewtech.
Why are you showing a high current test in the 3 wire configuration when the kewtech KT63 instructions state that this function is only to be used in a 2 wire mode.
What if your incoming supply is an SWA cable, and it’s also carrying an earth through the armouring. Removing the main earth from the bar won’t make a difference then will it?
what is name for that measurment sir ?
if i doing that test, can i use earth tester ?
my acs 850 drive trips in earth fault. megar test of cables and motors are showing ok, some times it runs f0r 12 /10/24 hrs but again trip. we reset the drive then start, some time it start and some many times of reset/ start then it run, what is the problem?
Well explained..
Love this video!
This is really good is there any more subjects that can help me revise revision for my am2 test
Very helpful. Thank you :-)
Well in andy 👍
Fantastic
Great video but how does the maximum breaker rating come into this? For example, a 6 amp breaker has a rating of 6000 amps. Why is this 6000 amp rating necessary?
gregorginny same as your car it can only go 180km/h
Others can go faster.
That’s the rating of the device.
You can get a higher rating like 10kA
Type B RCD/RCBO disconnects at 5x it’s rating ( generally speaking ) . Everything has to have a rating. Lighting circuit (6A) has lower demand than say a power circuit (32A). They have to ‘trip’ at up to that 5x rating.
I am not sure why it was tested further down the line but still written in as Zs at DB? This is the last bit covered. I guess to find the highest figure for Zs but that is not the box being marker which still says at DB
Very good
@12:03 test. Good
thnx, very educatative
nice video the best
My thanks to time and chrisfor
The best evere
There are two rooms and one corridor each place have one light when we turn on the one's room light the corridor light turn on, and when we turn on light of the other room the corridor light also turn on But one room light doesn't effect the other room light.How this circuit possible?
Call a sparky...
I'm still trying to find out how the impedance tester calculates this for the supply side with the supply side active. No one seems to be thinking about this. Are some assumptions made about the supply side parameters ? Because unless you shut down the suppliers side and measure the source impedance with a 50 or 60 Hz generator, there is no other way to do it. Anyone care to comment ??
Good comment. Anyone else?
Which tester can be used to find earth loop impedance
An earth loop impedance tester! 🤓
Helpfull
Great
Live to earth test with cheap multi meter and big spark at cooker outlet. Is this cos cheap meter
Nope. It’s because you do not know what you are doing...
nice sir
Nice
Niceee
I thought you asked the supplier to provide ze figures?
lee johnson he can give you the maximum admissible.
But you can test it also, make sure it complies.
Same with the prospective fault current.
If no I fi is available you can take
It as 16kA.
👷👷👷👷
Nice tutoring till Zs@DB. You do not do Zs test at DB unless is fed from a submain and is in another outbuilding.
Why, am confused, blocks of flats feed in SWAs how else would you isolate earth from supply cable. Also modern buildings with metal stud work and metal fuse boards can through up some strange results.
152K views and no comments???
Low sound.
In practice this is never done, a simple continuity check along with standard sized cables and wires is the name of the game..
Yep if “you’ve been in the game for over 40 years”