Insulation Resistance Testing of 2 Way and Intermediate Switching Using Guidance Notes 3 AM2 or AM2S

[@rsnow1212]

Awesome video as always , as a veteran of the armed forces and now a sparky for a few years, one thing I love about being a sparks is how we always as a collective strive to achieve standards across the entire electrical industry together and care about making sure everything including testing is carried out like gun drill so everyone’s on the same page and to a standard , and we are always keen to further our knowledge Keep up the good work

[@ningis21]

Thanks for another great video. I would like to mention that the terminology as required by C&G exams etc... is Megohms... (Meg-ohms)...and not Meggerohms or Megaohms as is often mentioned to by trainees. Picky, it may be, but at least you'll be pronouncing correctly to anyone in the know. So, once again I thank you for putting the measurements up on the screen in writing, for all to see.

[@JasperJanssen]

If that is true, the exams are wrong. The term *is* mega-Ohm, and MegOhm is incorrect. Nothing to do with electrical regulations, this is pure physics and ISO. MegaOhms just as much as it is megabytes and megabits etc.

[@richardwash6678]

Nice one Gaz and Joe, super teaching. 👍

[@CellAmen]

I love seeing how much you electricians care about your customers safety and the quality of standards. Teaching out to the internet to try and ensure safe practices are adopted by all...

[@davidroche6973]

Thanks great video and great advice, will be sure to review the way I test the Two way lighting circuits in future 👍, love the over view of GN3. Hope more to come as would love to follow up my studies with an AM2s in the future

[@ashmanelectricalservices4318]

Well done Gaz and Joe, I think this may be your best video yet. Would love to see Matt back on our screen carrying out some on-site work.

[@GSHElectrical]

Thanks for the continued support Gaz 👍

[@portiamiya9163]

Very informative, yall explained in a way everyone would understand 👌

[@craigemmott4976]

Thumbs up as always chaps!👍🏻

[@stephengreen909]

Love these videos. They help me so much.. 👍👍👍👍

[@GSHElectrical]

Thanks for the support and watching Gaz 👍

[@JoeRobinsonTraining]

Glad to hear it Archie, stay tuned for more!

[@michaelcostello6991]

Great guys for sharing all your knowledge. Thanks

[@GSHElectrical]

Thanks for the positive comment 👍🏻

[@Clydepatos2001]

Great video very good explanation

[@linksone6287]

Another blinding video again Gents. Chemistry is truly authentic. 👍🏾🙏

[@GSHElectrical]

Many thanks 👍

[@joerobinson5178]

Thanks Lincoln, stay tuned for more!

[@leewright4622]

Brilliant, thanks for such an in-depth, detailed video. It’s appreciated. 👍

[@GSHElectrical]

Hi. Thanks for the lovely comment and watching Gaz👍

[@CBDB-cu5rt]

Fantastic, thanks for your help guys 👍

[@GSHElectrical]

Thanks 👍🏻

[@gavindebrito7117]

Brilliant as always👍

[@GSHElectrical]

Hi. Thanks for the support Gaz 👍

[@joerobinson5178]

Thanks Gavin, appreciate the kind words.

[@Alex-qb8no]

Excellent video and very helpful, thanks guys ++++

[@ashvanbro9329]

Smashing video guys

[@GSHElectrical]

Thanks

[@electricalservicesmaroc]

Thnks from Moroccan electrician

[@GSHElectrical]

Your welcome 👍🦾

[@parismonochrome2217]

What's the difference between the AM2 and AM2s. I done my AM2 last year and passed with flying colours thanks to your videos Gaz.

[@GSHElectrical]

Hi. AM2s is about 18 months away from being rolled out but we think in the new one learners will install some of the containment. Thanks for the continued support Gaz 👍

[@thumbclicker7173]

GSH Electrical -indeed containment and there seems to be a new grading system where candidates will get marked- distinction, grade merit or pass respectively oh and fail obviously.

[@djevil247]

This videos has been some help, thanks!

[@simonmorrissey4741]

Your amazing Gaz I wish I had you Teaching me 👍🏻

[@GSHElectrical]

Thanks for the support and watching my videos. Gaz 👍

[@lsnogaming2893]

Wow help now it AM2.... Legends

[@Hiccup77]

Great Vid. When I did my AM2 last year, i had to physically disconnect the conductors from the terminals and connect directly to the conductors themselves. For my test centre, this was the preferred method. I did ask if I could test the whole 3~ installation but connecting to the bus-bar and completing the whole board, or switching individual circuits. The examiner said this is fine, but for this test, he preferred that we test individual circuits at a time.

[@GSHElectrical]

Hi. Thanks for the feedback and watching 👍 all the best Gaz

[@mohammadtariq1541]

Yes, this video is great help, just a question that you are using red lead to cpc, I know technically it doesn’t make any difference but does assessor don’t mind it? Thanks

[@watchdogman4766]

A great video

[@jkw6487]

Another awesome video. Just an idea could you do a video explaining how to get yourself noticed by an electrical company for an apprenticeship. That would help, thanks!

[@GSHElectrical]

Hi. If we don’t do one in the next month message me again thanks Gaz 👍

[@jkw6487]

No worries, and thanks 👍

[@zoltantot2978]

Hi guys. I am following your channel for a while now and I must say it gives me a big help in passing my exams. Thank you so very much. I am preparing myself now for AM2 exam and this video is again huge help as the others. 🙏 However, I would like to ask you (if it's possible) for help in inspection and testing of S plan CH system. On which part of installation and how this inspection and testing has to be done?

[@GSHElectrical]

Hi. Thanks for the wonderful comment. Sadly we have been planning heating systems and fault finding videos for sometime but currently with the pressures of teaching and our eFIXX website and KZbin channel these have been put on the back burner. More content coming but maybe not soon enough to help you this time. All the best 👍 Gaz

[@zoltantot2978]

Hi Gaz. Thank you for your quick response. I understand completely what you are saying, and I wish you guys a great deal of luck and all power to your elbow! May I ask you as one of the schools which are providing training for electricians, why there is almost nothing about this topic in learning materials? This topic is part of AM2 exams, and there is something little about S plan wiring, but absolutely nothing about S plan inspection and testing and fault finding - why is that?

[@reganfoster1399]

Hi guys brilliant video. Do you have any videos on other parts of the AM2 and AM2S as I’ve got mine of the 25th February? Keep up the good work

[@GSHElectrical]

Hi. Sadly no direct videos but we will be working on some in the coming months. It’s only this year that team electrical has got the apprentices back (long story) hence little current content on AM2. Thanks for commenting and watching Gaz 👍

[@Ben-zn8pe]

Loving the videos, just a quick question. On the other video you had the switches on in the CU, is that because you were isolated at the isolating switch and testing the whole board on initial verification? Cheers

[@harrycollins4347]

Hi Guys, just a quick question: If you walk out in to the installation do you need to apply any lockoff devices to the the breakers? Or do you just excercise your own judgement when you come back to the board. I'm loving the videos by the way. I'm not an electrician or in the industry but I am fascinated by the trade.

[@GSHElectrical]

Hi. In our installation the main tails are not connected. If the installation was live and isolated at the main switch within the consumer unit then the cover would need replacing every time you walk away from it. Great question and thanks for commenting and watching Gaz 👍

[@harrycollins4347]

Thanks Gaz. Hope you have a good week!!

[@fadders1982]

I was told that you have to do the test 5 times on an intermediate circuit as when you operate the 2nd switch, you're turning the circuit off. The same happens on the 4th test. So 5 tests turns the circuit on 3 times

[@matthaddock6490]

Great video

[@GSHElectrical]

Thanks 👍

[@CJTHEAUTISTICGAMER]

Interesting. Wonder if I'll be able to do this myself.

[@Khanjan-si8me]

Thank you best video

[@terrymeade1930]

What would you suggest if you were to do insulation on a school lighting circuit that have many lights with ballast and it would not be possible to remove every load? Thank you for your great videos

[@GSHElectrical]

Thanks for commenting 👍🏻

[@garethfox6537]

Great video guys as always, I find watching your videos really helps me refresh my memory while doing my level 2 domestic installers course. Quick question if you come across an garage installation for example where there's a number of sealed led 4ft fittings where the connections are behind boarding and not accessible I s it ok to be doing the installation resistants test at the reduced 250v.

[@fishinglad1644]

garethf fox same question I had buddy. Watching for a reply. 😃

[@henrytwigger2245]

It's all very good doing all of these tests, but how do you write it down on the form, in a way that makes sense ?

[@a_l7515]

nice vid

[@johanburger6109]

Hi GSH lovely channel you guys have. Great to see the passion taken so far. Question though, it's off topic but is the RCBO required because of the lumaires in the circuit? I just arrived in the UK but back in sa lighting does not have rcd protection. Is this RCBO providing fault protection in this case

[@GSHElectrical]

We use a main switch RCCB (RCD) for additional protection for this lighting circuit if the college had the money it would be an RCBO for best practice. Thanks for the support and commenting. Gaz 👍

[@johanburger6109]

@@GSHElectrical thanks Gaz👍we had nuisance tripping in sa so rcd on lighting was removed from the regulations. As well as having the hot water cylinder on rcd, that too was removed. Different strokes for different folks haha. Thanks again mate. I have subscribed :)

[@fishinglad1644]

Great video- quick question, and I’ll use an example... say this test was to be carried (e.i.c.r) out in a down stairs lighting circuit, and there was 2x rooms on that circuit with 10 or more fixed l.e.d downlight in each room- would it be acceptable to test the circuit on the 250v setting as it would take so long to disconnect 20+ Downlights? Or could you put it down as a limitation and not carry out the test for the e.i.c.r? What would be the best practice? TIA, John.

[@connordickens2617]

👍👍

[@gazdkw82]

Would all combinations be tested if you did (live/neutral combined) to Earth?

[@GSHElectrical]

That’s the preferred method Line and Neutral together to Earth and then between Line and Neutral 🙌. Thanks for commenting and watching Gaz

[@melódic_breeze_VIIIV]

Is there a reason why you don't operate the switch to the left hand side of the ccu. I sit my trade test a week today so I'm trying to figure out every little detail before I go in.

[@StanGuru]

They want you to check between CPC and neutral every time even though the intial CPC to neutral test would have covered any possible combination of switching as you're never going to be switching a neutral? What a waste of time. Good video either way.

[@tempa2010]

What if the switches had neutrals in them and had been wired up wrong say as a strapper on one leg. 🤷🏼‍♂️

[@JasperJanssen]

So in between checking with clip on earth bar and probe on line, and checking with clip on neutral bar and probe on line, you have to put your probe on the neutral bar and push the test button for half a second? Such waste of time, *quelle horreur*.

[@wediasmera1263]

Thank u

[@Edeybead]

Is it just both 2 way switches being operated off camera? Thanks :)

[@GSHElectrical]

Test then operate first 2 way switch test again then operate the intermediate switch then test again then operate the last 2 way switch and test again. 👍🏻

[@swadeshmondal7409]

How many prise and where it available in India.

[@ciaranmccarthy56]

Why don’t do you do live conductors together to earth on this video like you do on the other insulation resistance test on other video you do

[@fd1150]

I also don't understand why signal tracers/TDR aren't used more in electrics. You would know paths and switching for sure with so much ease. Not necessarily worth it in this case but relevant in others.

[@kankoeadamahhemazroyao.9485]

why bringing the probe when the voltage range on the probe is 500v?

[@jaydenplaysguitar3896]

Can you do continuity instead?

[@GSHElectrical]

Continuity of CPC and Polarity of a 1 Way and a 2 Way and Intermediate Lighting Circuit (R1 + R2) kzbin.info/www/bejne/kILYqJWkrt2Dl7s

[@charliechimples]

Great vid. 🐵

[@mcbunson]

For intermediate switching why do you have to repeat the test for each switch? Surely you only need to operate the two 'two way' switches at each end of the switch chain? From drawing it out there are effectively two parallel circuits between the two end points. Therefore for any amount of intermediate switches in a chain you only need to do 4 tests to garentee that all cables have been tested.

[@JasperJanssen]

That seems right to me with the schematic in mind? Actually, only 3, but that’s marginal. On your first test, you test the line to switch one, and then one of each of the two runners, and maybe or maybe not the line to the fixture. If you then switch the last switch, you will add or remove (you don’t know) the line to the fixture. If you then switch the first switch, you switch to the other runner on both/all sets of runners, and then you actually already have all sets of cable done at least once. However… if you have an intermediate switch where one of the two positions breaks the connection onto one of the runners, and the other position *does* connect said runner, you could by accident have it in the position where it doesn’t connect, and then you fail to test both that runner and potentially the line to fixture. (I don’t know, do they deliberately introduce weird failures during exams?) So three tests are enough, *if* and only if you also know that all switches are fully functional (which you’d have to test both before and after), *and* you know which of the switches are two way and intermediate, and as long as the readings are significantly above minimum. If you get a near-breakdown of 25 on a runner and also 25 on the line to fixture, for instance, the three tests could potentially miss out the scenario where both of those are present and together would end up at 12.5. In the end, best practice and the sort of thing you’d want to show an examiner is probably still to do them all just in case.

[@korona3103]

I don't get this thought process. Why don't you know that the two way switching is live or not based on switch position? I know sometimes people put their switches on up or down but that is also true of single switches. It's just binary. If you're smart enough to do testing you're smart enough to know which combination of switches turns a light on or not.

[@tempa2010]

With 2 or more switches both up and down positions can be open or closed circuit

[@gcelec7884]

Joe could easily be in a Peep show

[@GSHElectrical]

100%

[@gavinpestana2394]

Hi Apparently on the pre am2 I did, you have to disconnect the supply neutral because it’s a TNCS system is this true? Thanks

[@GSHElectrical]

Thanks for that lovely up date and it makes total sense. All the best Gaz 👍

[@georgereynolds124]

👍🏼👍🏼

[@HoldMyBeerDayZ]

420 BLAZE BOI!!! ahahah classic college

[@jacqulinehanlin]

boring