Insulation Resistance testing blarney
Вставка
- Опубліковано 12 лип 2024
- 25 minutes of jabber on IR testing. What's not to like??
Actually, don't answer that. Instead of complaining about low audio levels, my boring voice or my (frankly bizarre) haircut, go check out these other channels:
James Beck Electrical
/ @jbe
See his "First fixing and testing @ the house of HORRORS!!" for downright murder by drowning of a poor Pot Noodle.
Nick Bundy Electrical
/ @nbundyelectrical
See his "Tool review on Wiha Speed, Dade dust , CK Armour Slice, Cable Tongue and Stanley tool bag" for an electric screwdriver I can't afford!
A can of special brew is recommended while testing 😂
All good electricians know that a Can of special brew will NULIFIE the power supply, as it does with the HUMAN BRAIN.
Great video. That's for explaining the linked IR testing, I've done it on the test rigs at college but was trying my best to get my tiny little marble sized brain around how linking line and neutral doesn't cause Winny to flash...I mean light up 👍
A really well produced, informative and factual video. Long may you continue to educate, inform and make us all splurt our drinks over our screens with your unique humour. 👏👏👏
Very kind of you to say so, thanks Richard
Yep, was drinking my coffee watching your video and minding my own bussiness.. then all of a sudden the fat end of fuck all came along and that was it, horizontal coffee flying through the air
Loved your video, very informative and funny. It took me a while but I eventually clocked the can of special brew above your resistance box!
I CANNOT for the life of me believe you didn't touch that special brew once..........Another good one ...Thanks
Cheers Marky. I'm tucking into one now just for you!
Its already empty... 🙄😂
love your videos mark so fuckin funny. 😂
Salam Ibdali Dave’s are funny too ;)
You’d be better off drinking petrol...
Just brilliant. Incredibly informative, entertaining, and just what I was looking for a week ago. (God bless the all seeing algorithms!)
Thank you so much.
Subscribed.
Really like you doing the maths for circuit length on your sockets - such a DOH moment on a new install if you open an existing THEN discover youve made it to big!
Excellent video again David.
Informative and entertaining as always.
Winnie the pervert may stick longer in my memory than the IR instructions but so be it, I can watch John Ward again
Can only presume the special brew was already finished....... Most informative videos on here. So good to see how other people do the job ✌
Good deduction sir, that one had been previously extinguished, otherwise this video wouldn't have happened.....
great video David, some good gags and a "proud spring on " had me in giggles, some good education in the as well cheers
Excellent Video, good part on PAT Testing too , Thanks .
Great info thanks. Am finding you’re vids extremely useful going for my 2391. Very informative and light hearted makes things stick in the brain with a good reference point. As much as you have now distorted my childhood learnings of Winnie the Pooh, and I can no longer see the innocence of the relationship he has with Eeyore, I very much doubt I will fail on any reference to IR testing and sensitive equipment. So thank you I think for that but definitely for openly passing on you’re wisdom, and inspiring the keen to learn, please keep it up.
Electrical safety inspector
Military base
Long way from home
Somewhere in Iraq
Cheers Dave, and good luck with the 2391! Also, try not to get blown up or shot or anything!
Electrical safety inspector who is studying for the 2391 exam haha. Delusional
Absolutely superb Dave, real world examples too. Top man
Thanks Rob.
Liked that. It can be a tricky test, but once understood, essential when fault finding, and as you say covers your back on new installs.
Covers your back, sac, crack and ass if you do all the tests!
Brilliant Video Dave thank you, so much useful information, most likely one day Line to Neutral testing (EICR)will be thing of the past. Great your supporting Nick and James their top guys producing good content, Thumbs up.
Yeah, they're good lads, thanks Dave!
Very nice videos, proper information, in depth and still manage to be funny. Thank you!
Cheers!
Love a bit of Testing Talk!
PHWOAR!!
Really useful. Many thanks. More like this please on other testing detecting. Excellent channel.
Thanks Dave for such an easy to understand, informative video.
Hi David, love the videos and your sense of humor. Haven't got a clue what your talking about but still watch 🤣⚡🤗
Haha! Most of the time my mouth just moves and I haven't got a clue what I'm saying either!
@@dsesuk
If that's how you operate sir, then you should have a career in politics.
Every politician going has continuity fault between their mouth and their brain.
Brilliant video David, a lot of companies out there that claim to specialize in electrical saftey testing limit IR testing between live conductors irrespective of how many loads are on the circuit under test. I remember Sparkyninja being subcontracted to carry out an initial verification on an installation where integrated downlights and appliances had already been second fixed and switched on 😂😂😂
Thanks for the feedback as always Alvin! I saw that vid too. It's nuts out there!
Very informative and well demonstrated, 👌🏻
Thanks Dave - Good informative video with real-life examples.
Started to watch this on my phone but 2 minutes in Poldark went off and I watched the rest on the TV. Great information explained in an understandable way. I remember a few years back when I was still with the NICEIC my assessor made me remove all the USB sockets before carrying out an IR test, even then he said keep it in 250 volts just in case. Nowadays I just blast everything with a million volts and walk off FYI- I have no idea what Poldark is. Cheers for the mention Mr Savery as always nice video 👍.
The pleasure of pointing out your lack of being able to properly nurture a Pot Noodle to full maturity is mine my friend! By the way, I have family in your neck of the woods who asked me last week if I knew an electrician. I'm afraid you're in the chair if the shit hits the fan up there!
Great educational video as usual. You make me laugh out loud so much - love the humour! You have a great name too - but an 's' too many I'm afraid! Could you do a video or part of a video on under kitchen cabinet lights - what's available, how best to wire them, etc. Keep up the great work!
Thanks David. An interesting idea. We're not on any kitchens at present, but something may pop up we can take a look at!
Great vid as always David. Humour included!!! 😂😂👍🏻
Ta!
Not an electrician but your videos are unmissable, great stuff!
Thank you Mr Chops. If that is your real name... which I doubt... :)
@@dsesuk Nah, it evolved from an old school nichname 'Moschops' based on my surname. Glad you asked? Thought not 😋
@@JamesMossR33 Moschops?? Was that a TV show or something? It rings a bell...
David you are a true legend! cheers mate for such a valuable info! you have got a new subscriber!
Nice refresher thanks.
Amazing how a bit of humour gets the otherwise boring information to stick to the sides , should be part of all apprenticeship curriculum
Another enlightening educational fun packed video Dave. I wish my lecturers at college in the 90,s had your sense of humour. I always start off at continuity, then 250V, then 500V IR test, so i'm already complying with the DSE code of practice :-) Try it on some T&E that's been installed outside, open to the elements for a few years. surprising how much the IR breaks down, which is why I always inform customers it needs containment in conduit or use a correctly IP/UV rated cable.They never believe me of course lol.
I hate seeing T&E on the outside. It's not the sign of a professional installer in my opinion, and like you I've seen it degrade when exposed to the elements over time.
Hi David, you should be on UA-cam :-) VERY informative and VERY entertaining which makes all the difference, keep on truckin', great!!!
Not sure it's the platform for me Keith!
I get a spring on watching your videos
Excellent tutorial sir ❤❤❤❤
Educational and hilarious! My new favourite sparky channel!
"Winnie the pervert" hahaha, I've only watched this 1 video of yours and you've already gained another sub! Can't beat a bit of humour in this trade.
Great video Dave, keep them coming!!
Cheers Neil, I'll try!
Good video, I always do a 250v before diving in for 500v. Almost a certainty theres a hidden socket with something in it somewhere 😂
The ol' USB socket located in the secret sex dungeon/kidnap attic that the homeowner never tells you about.
@@dsesuk I never get invited to those...
Great video man Very informative
Just wanted to say bloody brilliant videos. You answered a couple of things that have bugged me for too long. Thanks so much for the CPD it is very much appreciated. It also explains why other electricians have been so much quicker when it comes to doing periodic inspections - sorry EICR?
Thanks David, and you're right that inspections take time. If someone does it quickly, they've cut corners. Someone who does it quick and cheap hasn't really done it at all. Even if it only cost £60 instead of the legit guy who quoted £200, it's not value for money if it's not worth the A4 the results haven't been written on!
That’s truly good to hear. I often feel as if I’m earning nothing based on the time it takes me and hearing the contractor saying oh well the other electrician does it so much quicker than you it’s cause you’re not experienced (which might be true). I’ve never used LIM on my results as a) I work in the domestic environment and b) always felt uncomfortable leaving a property knowing I may have missed something by using the LIM. Then there’s the am I just pissing off customers because the powers off.
At least I can sleep at night! But I gather the other guys do too. 😂
@@digitraxuk delusional
Another great video cheers Dave.
Excellent bloody excellent
AnOTHER Great video.
Many many thanks!
Albert.
Cheers Albert, and Happy New Year!
Just the information I was looking for... and laughed too.. excellent video ..
Thanks Dean, I'm glad you found something of use in there!
Hi David
Love your videos very useful and informative,
I have not done anything in the electrical field for 20 years now? I qualified back in the late 80s after doing C&g 236 parts 1&2 but I do try to keep up with the regs and so on.
Oh the next time you decide to cut your hair with a bole on your head tty using a colinder you might end up with spiky hair LOL that video was brilliant your so funny keep it up buddy love watching you
Great vid mate , still got the old stock special brew lol
Y'know, they were bought at Sainsbury's not too long ago. I guess they shift the stock quite slowly there!!
As all way another brilliant video have to say more of a Carlsberg export fan my self, cheers
Thanks Matt!
learnt quite a bit there,good vid,enjoy your can
Great job again like always
Great Video Dave, keep up the good work 👍🏻
Cheers James
Great explanation ,many thanks. Can't help think that you should have a Ade Edmonson from the young ones help you . Rgds Don.
Thanks Don. If Nige wears his glasses instead of his contacts, then we do make quite the tribute act.
Great Video! as always
Just a great Video, thanks
Great info thank you
Great content and humour.👍
Great video mate 👍 cans of special brew and live busbars what can possibly go wrong 🤣
My company policies and procedures, which I admittedly authored, encourages lager around live equipment, so I'm alright.
David will you do similar videos for the other tests r1 r2 and zs and that, great how you put little scenarios in as to what could affect readings
@@ericthekingthekingtheking4842 I've been meaning to do such a vid for ages now, and that's one of the reasons I put this test rig together, but I never seem to get around to it. Finding the time is the problem, I'm wall-to-wall with work at present. Seeing as this one on IR seems to be pretty popular though, then maybe it's not a bad idea to knuckle down and finally get on with it!
David Savery Electrical Services
I hope you get time to do them mate, really informative with your insight and obvious experience passed on and showing what you may find in your readings,and how to remedy it 👍
Iv watched 1000's of UA-cam electricians documenting their work. So when I first spotted your videos I thought to myself, oh no not another electrician doing videos. I'm kinda done with that.
However im glad I persisted. You sir are the funniest electrician on UA-cam, plus one of the most informative.
Spat my coffee out at "fat end of fuckall"
Brilliant.
Thanks for your persistence Gareth!
Hahaha david special brew on the top of the consumer unit.
Good videos david and maybe the special brew helps alot :)
mhh i mainly did insulation testing on motors and heating elements and some other stuff :P well cables too .. but those cables soaked up water over time and got a bad insulation resistance.
Fun fact .,. have an old cable over long time under water like a silicon cable and so on can soak up water and cause en earth fault too
Great video.
David, connected loads are a pain in the arse, but every time I approach the local barracks to ask for help disconnecting connected loads I'm told to " Do One", and hate having to put down LIM but unfortunately it's the way of the modern world. Bring back the 80's when all I had to do was bypass dimmer switches with a single pole switch or koblingsblokk, opps sorry I meant connecting block. (P.S. Koblingsblokk came from when in the 90's I was installing central heat recovery systems on a private estate and the destruction's were in Norwegian, koblingsblokk was their word for connecting block and it kind of stuck in my brain) lol!
Koblingsblokk is a fantastic word! I might have to start using it!
@@dsesuk Also FYI Koblingsboks = Junction box !
Fantastic video
Thanks for the video 👍
You're putting in the viewing hours at present Richard!
David Savery Electrical Services I sure am, getting balls... erm really into everything electrical, in anticipation for next year 😎
Nice on David cheers
Thanks Gary.
🙌 cheers Dave always a pleasure to watch 👍
Thanks Nick, i didn't miss you out this time.... Mainly because that screwdriver price gave me palpitations....
@@dsesuk i think he got it cheap off the Tat man
The copper recycling does pay off...
@@dsesuk to be fair you need to be very careful about the sort of Tat man you go to i would personally avoid the one who has an endless supply of soap bars
When it arrived I got the (insert spring noise) but I do use the hell out of it so will pay for it self in a decade or so 👌
Yet another excellent video... forgot to say last time we spoke it was john ward that put me onto your videos believe you was at collage with him ... he may one day be my brother in law if his sister gets lucky 😆
Sadly not; according to LinkedIn, John was at school when I was at college. Probably for the best as I suspect he would have beaten me up for my lunch money.
brilliant content. Subscribed.
Welcome aboard sailor! Now grab a bucket and start bailing!
Hi
Coming from the automotive side of things. Do you factor in the Ohmic value of your test leads for testing as very low values are encountered.
Thanks
Hi Dean. I neglected to mention it in the video, but yes, the test leads are nulled before testing. I meant to show that, or to mention it, but forgot to do so.
OSG.... bleargh LOL
I carry the big blue BS7671 itself around, it inspires confidence in customers. I think. It's also handy for standing the tea mug on
I know, what a load of shite. I have literally just this evening bookmarked my blue copy after already having it a year. It's the first time I've given it a basic flick-through, and the only reason I've tabbed the pages is for these videos so I can reference page numbers. Still, I need to show it on the coffee table when the NIC come a-knockin' every April.
@@dsesuk We found you can get away with an e-copy on an ipad of the OSG ;)
David Savery Electrical Services also handy if no bog paper on site
Love this channel and I’m glad Richard Richard pulled himself together once Bottom finished.
He never quite sobered up though.
*"...just ballet dances off the fucking tongue..."*
That fucking killed me whilst staring very glumly at my first EICR form the instructor thrust on my desk with a smug smirk on his face 😐
Lovin the learnin Dave !! 🍺🍺🍺
😎👍☘️
Cheers!
Great Video!!! When trying Live + Neutral to earth while leaving the cooker switch left on I did get •28 MO. Is there any reason the cooker switch alone didn't take to this?
Very informative video as usual David, is there a possibility on giving us a future video on the run down of the Fluke installation tester? Cheers, Noel.W, Magnetech Solid Solutions Ltd
Thanks Noel. The only Fluke I've got is the 1651B which is long in the tooth now. I mainly use my Metrel MI3100s and TIS MFT Pro, both of which I've made videos about in the past.
Hi,
Ze, IR etc testing should be on the main switch or on SPD?
Thanks
Please, please give up electrical work and become a stand up comedian! I simply love your scripting!
Haha! It's alcohol powered humour Imran, electrical work drives you to drink so it's the only job I could do!
Best & funniest sparky on utube😂🤣
And very knowledgeable too
@@jaye8578 gotta agree.. has me in stitches
Similar sense of humour I guess
What I find a bit odd is why the USB sockets are not required to have a separate switch or be tolerant to 500 vdc of normal test procedure. Do they have a fuse other than a small fusible resistor on the cirquit board? What might the logic be behind allowing them being installed at all?
What's the insulation resistance of the Carlsberg Special Brew shown?
Or is it drinking resistance?
I have a low resistance to it, almost to the point of a short circuit.
Good video. What can can low values such as 0.01 Mohms when doing a combined L&N - Earth IR test? I have heard that surge protected extension leads can cause this. I tested a domestic dwelling this week and thought everything was disconnected but got 0.01Mohms. Thanks
Brilliant stuff David, really enjoyed that. How did you manage to get through the video without a sip from from the Special Brew? 👍
It was already empty. It was just there so I could still smell the fumes.
The IR test is my most hated test!
Mr slavery you make fun learning mate, don’t ever stop making these videos.
I love you man, your delivery is so engaging you're a really talented teacher/entertainer. If you look at my channel you'll see how stunted I become in front of the camera and how difficult it is to get repartee flowing the way you do it. All the best BTW is that your own test rig? What do you have it for, just for the videos or do you use it for some kind of experimenting? Are you absolutely sure though that there's nothing that can cause dodgy IR between lives and cpc in the domestic environment. I always thought the existance of an RCBO could cause low IR and some other things too. I had a boiler control unit that did this the other day, sure as day?
Oh I don't know, any video with this perspective has to be worth the watch: ua-cam.com/video/m8cWPS_4Mew/v-deo.html
Hi David, quick question - if there's a socket with USB charging points like the one in this video, is it good practice for me (as the homeowner) to put a note on the CU calling it out and mentioning where it is?
It certainly wouldn't hurt, although anyone performing a competent inspection either because they intend to modify a circuit or because they're performing a periodic should work under the assumption that fixed loads are present or that there may be an item of connected equipment they've missed. Unless it's an initial verification, then cautious IR testing is called for, and in most cases I suspect L-N IR testing is omitted entirely.
Unless u r an electrician u shouldn't go anywhere near a fuseboard fool
Question.. I see 15v across neutral and earth, if I switch off some breakers to an extension I've just built.. it falls to 6v. Is this an earth issue "possibly inductance”, do I need to add more earth rods ?
RAD Official My guess is that your earth is not the immediate problem, it sounds like you have excessive resistance in the other conductors. With a load on in the extension are you seeing a big drop between live and neutral?
@@g0fvt I switched on/off the AC and other items in the new extension, no change between live and neutral it’s stable around 228v, but I am getting that difference in voltage between neutral and earth. Is it possible a piece of equipment is causing this, or just the fact that when things are connected it’s adding to a voltage rise.. for some reason?
RAD Official that supply voltage is a little lower than I would expect, I wonder what the voltage is at the main house supply. Normally the earth current is very low, some appliances with mains filters will pass a little earth current but very little. It might be worth extending one of the multimeter leads so you can measure the voltage between the incoming earth and the earth in the extension. There should be next to nothing between the two points. There are various different ways that the supply earth can get to a property if your “earth” is a TT type (ie a grounding stake) it would appear to have a significant problem. Personally I would investigate that prior to adding more.
Thanks
If that can of special brew was sitting on a metal box, would it be classed as an extraneous-conductive-part?
Yes, this is why I advise the use of beer in bottles rather than cans when working around live equipment.
I literally spat out a mouthful of Punk IPA when you said Winnie the pervert. Stupidly hilarious.
Shocked and appalled to hear of the beer wastage!
Had a light fail when working on a DB in a dark room, up a ladder and forgotten spare batteries..nah never happended to me !
👍🏻
Hi good video , just think with having los of apprentices coming from collage they only see IR test that pass and none that fail so think it would be better that you show IR test that fail such as anything under 1 ohm fails. On all circuits but above 1ohm passes although on a new build 2 ohms can sort of pass but is not recommended, also a low reading can be just damp , and if you leave mega on you can prove and dry out and prove that it is indeed damp that caused the low reading , also you could mention that having a reading off 500ohms say will not necessarily blow a fuse also that in quarry s you often see readings that low
IR test the reel of cable before use even new reel👍🏻👍🏻
😂😂😂 Good one
Brilliant video. Very sobering 😂
They seem to have the opposite effect on me....
I think you forgot about removing your Christmas prop beer can ya wally.
Hi David, thanks for the entertaining and informative videos. The grey box to the left of the consumer unit, can I ask what make it is and where they can be purchased. I need one like that for a project I have in mind. Do they come in larger sizes as well ? Thanks for any info.
It looks like a timeguard 4 way weatherproof box like the ones you can get from tlc
It's from Toolstation, code 67255, £19.06, 300x220mm and I think that's the biggest they do, but other suppliers may have something larger.
@@dsesuk thank you. That one might just be big enough for what I need.
It has 12 40mm holes, three around each side, and they come plugged with grommets.
It's only a matter of time before the tweed suited boffins make you do the calc for circuit length and write it down for prosperity.
On another note. I can't find anything about how they test znd inspect in the US. Do they I ask. Your thoughts.
You may be right, each edition and amendment to the wiring regs only seems to increase the paperwork burden for those of us trying to do a diligent and proper job while nothing is done to stamp out the cowboys and cash-in-hand chancers. I've no experience of US testing, but someone did comment recently that insulation resistance wasn't a thing over there. It would be interesting to know more about international procedures!
you are veerrryyyyy funny and a bright spark
Dave what do you think of metrel testers to which i have 2 ,which has a funny story attached 🤔 they are always give me grief buttons ,any sign of cold 🥶????
Yeah your right about the powers that be coming up with bollocks, just like basic and fault protection, a lot better than direct and indirect contact, not. Although they have to justify a new book and charging us £80 , at least there's never any errors in that book, that would piss me off. 😂😂😂
A bunch of PhD's who like to shuffle terms around to make it look like they know their shit.
(15:17) - Yes, but you've already shown us at (11:17) that that night light has got a plastic earth pin rendering this test pointless.
Sorry Dave, I just had to point that out.
Great vid.
>
Someone had to do it, and you didn't let me down!
Hi David. New to the industry so really appreciate the educational video. I'll be sure to watch all of your videos now. Can I just clarify my understanding please? So, if low IR between L&N, that means something is connected, but L/N&E should still give a high reading in that case. A low reading between L&N, but also low IR between L/N&E would indicate a fault. Is my thinking correct?
Hi Nina, thanks for tuning in! A low reading between L&N *may* indicate a connected load; certainly that's more common than a fault condition. It's something that warrants further investigation if you want a number out of L/N. Connected loads shouldn't provide a path to earth though, at least not unless there's something providing an additional service between line/earth such as a surge protector. I'm speaking of domestic equipment of course; commercial or industrial equipment may have goodness knows what to confound things! A low reading between L/N&E, especially at 250V so SPD's aren't triggered, needs investigation. Something's causing it, and it can potentially cause trouble!
Thanks for your reply, David. Yep, it’s a domestic socket circuit. Definitely no surge protection and all accessories have been removed (as far as I can tell). L-N is reading 0.25M at 250V and L/N - E is reading 0.5M at 250V. Obviously, I didn’t test at 500V after such ominous readings!
@@ninav74 Not great numbers those. I'd start braking down the circuit next. If it's a ring, then split it at a socket which ought to be around the mid-point and test each leg, then keep braking it down as best as possible until you find where it's bad. Of course, it may be difficult in a furnished house. We had one last year which we traced to a socket some idiot had spurred off and hidden under a floor where the neutral wire was leaking to the earthed knockout box through a split in the insulation. We only found it because they were remodelling the house; had the new carpet gone down we'd have been scuppered.
@@dsesuk m