Insulation resistance TEST FAIL! - Will a damaged cable show up?

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An electrical insulation test is a key part of ensuring an electrical installation is safe. In this short video, we demonstrate how it's possible to pass a test with a damaged cable.
Electricians' Multifunction tester used in this video.
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Опубликовано:

24 мар 2021

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Комментарии : 34

@TheYohtube 3 года назад

Its not untill you get a build up of dirt/dust/grime and some moisture that you will detect problem with an insulation tester. This example simulates rodent damage.

@efixx 3 года назад

🐁 👍

@Dog-whisperer7494 3 года назад

Excellent, David Savery did a similar video on this problem, just go’s to show fancy fancy test equipment isn’t the only tool, we still have to use our brain and think out side the box , I would repeat the test and then do a visual inspection if I am not happy with the first test depending on the location of the cables look for any damage moisture and or dust , but it is very wear to get such a problem on new installations but we should always think about such problems. Fantastic video Gaz as always Thank you 👍❤️

@rodgerq 3 года назад

Just dry it back off. Home time.

@1pjodan 3 года назад

Interesting. Can you do one while crushing a cable in a vice while gradually adding more crush?

@amatchmadeindevon2005 3 года назад

Under floors, in ceiling voids this could easily be passed if not visible on a EICR, or a new install if someone had clattered your cables laying flooring etc (or those animals also known as plumbers)

@efixx 3 года назад

Plumber animals 🤣🤣🤣

@dennisphoenix1 3 года назад

I have seen cables burnt to a crisp by a plumbers blowlamp and still test out ok .

@amatchmadeindevon2005 3 года назад

@@dennisphoenix1 yep we had a nightmare fault to find plumbers used metal banding strap across a waste pipe fixed at a angle, 1 screw through neutral one one leg of the ring, 1 screw through the earth on the other leg of the ring, so when separated both legs all tested out clear, popped off plinths and there it was right below a socket above the worktop, only a plumber could manage that

@dennisphoenix1 3 года назад

@@amatchmadeindevon2005 had one the other day , rcd tripping but only when 3 or more lights on , picture nail through the cable

@dennisphoenix1 3 года назад

@@amatchmadeindevon2005 had one couple of years ago rcd tripping, ir tested cable , all clear . Reconnected tripping again. Neutral was touching metal studding and going to earth but didn't show on IR test . Strange stuff electricity 🙄🙄

@bernardgarrett3897 3 года назад

It's the very simple videos you do so well that make your Channel hold my interest. Thank you and well done

@efixx 3 года назад

It’s an everyday day take of the simple eFIXX electrical folk.

@johnwaby4321 3 года назад

Yep get some damp on it in normal use the the resistance goes down . And starts tripping out 👍👍

@scabthecat 3 года назад

Wet spider. Retake live conductors to cpc.

@efixx 3 года назад

Or slugs 🐌

@jasonh5266 3 года назад

Brilliant learning material. Thanks.

@justdontgiveafukk 3 года назад

Imagine this in a muddy field with 300,000 solar panels. Client calls you out because a string is down, you test, no RISO fault found...

@811hlambert 3 года назад

Be good to see how long a piece of cable stripped and then left in a occupied area would take to become unsatisfactory without water just the day to day dust build up

@efixx 3 года назад

We might give that a try

@steveokinevo 3 года назад

Stick it up to 1000v gar

@efixx 3 года назад

👍

@tabasumcarpentry5336 Год назад

hi sir can an insulation tester detect wires if the wire's insulation is cracked but not touched each other. like some old cables' insulation cracked and the cooper conductor exposed but not touching each other?

@mrseanpride6449 Год назад

It can sometimes. The higher the voltage more likely.

@oyleyhands1332 3 года назад

Well..pure water is an insulator, is it not ?

@efixx 3 года назад

Yes if it’s absolutely pure - aka Yorkshire 💦 Water

@oyleyhands1332 3 года назад

@@efixx Thats where they call ice cream 'arse cream' is it not ? 🤣🤣🤣

@DstandsforDoomed 3 года назад

Whack a bitta green and yeller tape on that, be reet.

@oyleyhands1332 3 года назад

How about deionised water ? when all the ionised minerals are removed ? albeit in the real world, cables are unlikely to encounter deionised water ,UK spelling 😁

@johncunningham9840 3 года назад

U had dirty water or minerals in the water when you did the test. LoL. But thanks for posting this vid, again u guys are brilliant, and thanks for the info.Just fyi pure clean water doesn't conduct electricity.