EXTERNAL EARTH FAULT LOOP IMPEDANCE - 3 PHASE SUPPLY - AM2S/E
A practical example showing how to test the external earth fault loop impedance for a three-phase supply.
Essential learning for apprentice electricians taking AM2S or AM2E assessment.
Filmed with Eddie Clemmens of Pegasus Electrical during installation of a Schneider Acti 9 distribution board.
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More on the Acti 9 distribution board - RCBO's with no fly lead -kzhead.info/sun/mJltpciXenuseI0/bejne.html
Them linked out earth blocks are a great idea to stop conductors being put back in and out, loose connections and the likes, nice video Gaz
I’m taking this guy is new to testing, I was thinking your on the wrong setting, 2 lead high, glad your there to guide him through, keep up the good work as always. 👍🏽
Great video as usual. Obviously you are a knowledgeable guy. Your poor guy was bricking it.
Poor Ed looks like a real world spark who would have believed you if you told him it was Friday instead of Wednesday lol
You can do a 2 lead hi test even though there are rcd’s in the board cause the board is off. This is the second video i’ve seen now you saying this now!
Nice one gaz 👍👍
Great video 😎
Good video! Megger😍
Those MET bars are good. Any idea where i can get them from
Didn't expect to see Doncaster Cables - just down the road from me, they are!
THANK YOU FOR EXPLAINING ,WILL HELP ME IN MY EXAM|.
I first time seeing that kind of test.
Where can you buy those MET blocks and all the labels???
Where did you get that earth bar from?
Any idea what brand that MET is? can't find it anywhere!!
So, what should be done if the reading is above 0.35 ohm? Should we contact the DNO? Would this make MCB's operating devices inoperable?
👍👍👍👍👍
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Good job done there , but he did make a view mistakes , so give him a slap on the wrist 😂 ok he did sound a bit nervous . Fantastic video as always Gaz 👍👍❤️
Probably been doing the job faultlessly for 30 years. Gary comes along and he turns into a nervous wreck!
To be fair Sean, you've made a mistake in your comment 'a view mistakes' just goes to show, we all make them 😉 (and that doesn't exclude me) #just saying
What about PSSC ? Surely that’s going to be higher than PEFC 😮
I never realised there were 3 different types of AM2. When I did mine back in day, it was just called AM2. Could somebody tell me the difference between the other 2 different types of AM2?
AM2 is done by people who have done the electrical route not via an apprenticeship AM2s is for apprentices AM2E is for experienced workers, so they must have worked in the electrical industry for 5 years to be able to do the AM2E
Awesome video. Is this test usually done within the boundary of property or outside (on the councils side ) , please clarify . Cheers
3 pole or 4 pole main switch at the DB on a 3 phase installation...worth a discussion in a future video?
Must be 4 pole unless you have a very specific reason for a 3 pole.
Yes I always fit 4 pole but I see many boards with 3 ,pole units fitted.
Never seen the point of using a 3 pole isolator personally.
@@arcadia1701e according to who?
AND L-N WHEN WE MUST USE.I HAVE A METREL 3125 MI BT,AND I AM CORIOUS.THANK YOU
That earth link bar really ought to be secured with security bits to discourage removal.
The earthing conductor itself also wouldn't normally be secured with security bits... It will have a label saying don't remove though... There's only so far you can go to keep the terminally stupid stealing oxygen...
Another wanting to know who make the MET's
0:20 Ed needs to get himself a bigger pozi...
With all this pressure for only skilled people carying out live tests our professional spark who makes final connections doesn't look to be very familiar with basic initial verification stuff. Sure he should be doing this work? Makes me wonder how many new installs initial verification he skipped?😂
FAILED. You didn't zero your leads out first... Saying that I'm a Fluke man so not sure if your test gear has 4 wire compensation. With fluke you zero every time Espicaly when doing Ze, PSC, EFLI and every little ohm matters..... I now wait for a scolding about not knowing my test equipment, lol
you don't null leads on a zs or ze test its not a low ohm reading..
@@Ten_Pence Its vitally important on Ze, Zs, PSC to zero your leads as your measuring less than an Ohm for Ze also the reading given during the zeroing will tell you about the condition of your leads. And the connections they are making. Many times I've zeroed the leads and found the zero reading high compared to previous times and I've found I've needed to remedy that before I do the test. If your testing in the hundreds or thousands of Ohms 0.4 Ohm lead resistance doesn't matter but that would make your TNC-S reading 0.75 Ohms therefore you'd think the Ze was too high... I Zero my leads Every time I change the test. And I think that was a common sense requirment on my 2391 Test.
@@glenwoofit not at all as you are measuring at a higher voltage. Most meter won't / can't null on a ze
@@glenwoofit no you're incorrect.. I've been doing this quite a few years sir... if ever your over your max ze or zs you can certainly check your lead resistance but on this test you don't have to null your leads.. you're just wasting your time... The NICEIC have never pulled me up on testing this way as a QS...
@@Ten_Pence someone needs to consider ohm's law that will clear up his confusion