Concentric Cable - TN-C-S Cutout Connections

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In this short video we look at the connections for a concentric cable into a single phase cutout. We look at the connections for both the line conductor and the combined neutral and earth conductors.
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🔵 It's NOT SWA Cable Feeding Your House Cutout Fuse • It's NOT SWA Cable Fee...
This video has been designed to go on the RU-vid shelf as a short video in portrait mode.
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Опубликовано:

26 дек 2022

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Комментарии : 134

@GSHElectrical Год назад

Full Length Video It's NOT SWA Cable Feeding Your House Cutout Fuse ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-XzjVGOMyHm4.html

@4thelolz1 Год назад

I’ve pulled hundreds and will continue to if there is no isolator fitted …. Simple as that

@peterpeterson9903 Год назад

Yes, indeed, people get very excited about pulling fuses. I don't get it. DNO don't really care. Kill the load and pull the fuse.

@TheChipmunk2008 Год назад

Absolutely, EAW act and H&S determine you MUST remove it in order to work safely, but Gaz is quite correct to tell students that they aren't "allowed" to. They are still learning, and they will eventually come to their own conclusions as we have.

@uplightuk8924 Год назад

Gone are the days where you have to call-out the DNO. All you have to do now is notify them that you’re going to pull the main fuse and they will send you out a kit to reseal it when you’re done.

@TheChipmunk2008 Год назад

@@uplightuk8924 Yes, SSE do that service but we do so many, I buy my own seals from a metering supply company lol

@pauls826 Год назад

Damn right mate fuck the utility company they should be putting isolators on them when they come and check meters because they don’t want to waste aload of money

@pauls826 Год назад

Mate everyone pulls them out I’m a fucking plumber and I’ve pulled them out never arced on me and I don’t know what I’m doing 😂

@geoff4383 Год назад

Just make sure your gravestone is engraved with I didn’t know what I was doing

@DP-sx2pt 8 месяцев назад

Just make sure you don't put it back in backwards it will send 100amps back to the transformer and blow up the neighborhood

@fjspicer1 Год назад

Am I missing something here but surely if you had no alternative other than to pull the fuse wouldn't you make sure that there was no load on the system at all

@dan_austin__873 Год назад

It's just a scare tactic they use in the UK. Makes them sound more professional over complicating everything 😆

@oddjob1932 Год назад

Turn board off = no load = no arc

@thabisodube 10 месяцев назад

You still getting power from the incoming main so you would still have a flash over even if the supply was to be turned of on the board. I work for the electricity board

@jsb7546 10 месяцев назад

@@thabisodubeif there is no load there should be no arc simple as that. Turn off all loads before pulling fuses meters ect.

@thabisodube 10 месяцев назад

@@jsb7546 buddy you still get power on the incoming supply by your logic if someone doing work and they hit a cable on the road what you are saying is it should not spark or anything because they turned power off in the house come on think about it

@max_eley 10 месяцев назад

@@thabisodubeit wont arc at all, there is no load, i can prove it next time i work on one 😂 done it loads.

@davidfaraday7963 9 месяцев назад

@@thabisodube Hitting a cable in the road is an entirely different situation because you might cause a short-circuit in the cable. If there is no load current supplied by a fuse then pulling it isn't going to cause an arc.

@amd7267 Год назад

I have seen loads of cut seals and you would be able to pull the main fuse and isolate the board as they have already been removed or cut. Alot of older installations do not have a isolator and alot of sparkys dont have patient's to ring the dno and waste another day on the job. Happens all the time

@thabisodube 10 месяцев назад

You would need to ring your supplier if it's just for an upgrade and you waste even more time that way

@mikethemask1525 Год назад

100amp load only if there is a load turn the board off there's no load

@PrinceWesterburg Год назад

The electrical breakdown of air is around 2,500vdc per inch, that gap is about 1.5” (3,750vdc) and you’re talking about 240vac which won’t arc across.

@thomascluett510 5 месяцев назад

Been struggling to understand TNC-S from my textbooks for ages. Thanks for the video!

@samgriffiths7609 Год назад

I once waited for dno to turn up to pull a fuse as the maintenance team for the flats I was working at were adamant that I wasn’t allowed to pull it myself. Dno took 6 hours to arrive. I’ve pulled the fuckin thing myself ever since 🙄

@paulsidebyrne Год назад

A massive ark, don't think this dude has ever pulled one with load, sounds like hes green to me

@davebryant6905 7 месяцев назад

I always cut the seals and take out the main fuse when working. I never reseal and I've been doing it for 45 years.

@willingmicheal1182 7 месяцев назад

Please, my light suddenly went out in all the rooms, and all wall sockets. What can I do now please, i have open this place I Don't know what to do

@davebryant6905 7 месяцев назад

@@willingmicheal1182 Put another 50p in the meter

@cengiz246 Год назад

Great video

@electricircuit.solutions 7 месяцев назад

If i pull the fuse I'd fit the Dp isolator before I replace the fuse .

@tonib9261 6 месяцев назад

Can you call the DNO (utility) to pull the fuse, these days they often fit an isolating switch so electricians no longer need to break the seals and remove the fuse.

@petersharpe742 Год назад

How can it draw 100 amps if your loads are isolated? Some of your words used in your vids remind me of people who have studied the world of electricity but not really understood it.

@mad4powder Год назад

Trust me I backfeed subs every week for my job and you would be surprised how little load is actually being pulled from a couple of hundred houses. No domestic house supply will ever pull 100amps and if they did DNO pillar fuses would be blowing all the time!

@Swwils Год назад

Becoming more common to draw more especially with agile negative pricing. Heat pump, battery charging, ev charging, resistive heat, oven, washer, dishwasher all on for those periods. 👍

@stephenwillis9518 Год назад

You're probably also trained, have relevant experience, specific Rams, and techniques for doing this, along with full FR ppe, class 0 gloves with visors etc. Pulling the fuse is the easy bit, it's when things go wrong where all the above is required 👍

@TheChipmunk2008 Год назад

@@stephenwillis9518 Yes, we have had a short training course regarding pulling the main fuse, (from when i worked on a large private network) ... the PPE is only needed as you say, when it all goes horribly wrong. Had a nasty one a few days ago where the meter board basically disintegrated, had i simply yanked the fuse without looking, i'd have bent a 100yr old PILC at a right angle, which is not conducive to a pleasant day.

@jordandawes4049 Год назад

Yeah I work in and around subs all day with 200-630amp fuses in each phase of the boards and when it goes wrong... IT GOES WRONG 😅 blowing holes in pavements is always fun

@Anythingyoulike2013 Год назад

Got 3 electric showers on 100amp fuse, plus boiler running, pretty sure I go over but it's not often all 3 showers are running at the same time. Diversity...

@simolatham03 Год назад

DNO yeah we can use 12mm2 aluminium but FU you better use 25mm2 copper

@jckson8292 7 месяцев назад

35mm2 aluminium

@DreStyle Год назад

Cut wire first then there won't be a draw

@pigswillbepigs 8 месяцев назад

I like to load the system up as much as possible then shout, ok pull the fuse. You wana see their face, oh the fun we have at work.

@planespeaking 7 месяцев назад

I ask the people who fitted my smart meter about this. Do I have contact you to get the fuse pulled when I upgrade my consumer unit? Nah, the electrician will do it, was the reply.

@timprice5 Год назад

Quick question (non electrician), why is the earthing block covered on some of these heads? Surely that would mean in order to change a board to the latest regs you'd need to pull the main fuse, despite having a dual pole isolator installed (as the DNO installed in my house). Seems a bit silly or is there something obvious I am missing?

@richardparnell4221 Год назад

My DNO will no longer fit 100amp fuse as they said the cut out can’t handle it

@dougsaunders8109 Год назад

Does not bode well for electric everything charging

@GretatheEvilGremlin Год назад

Seen plenty that have 60 or 80A bullets in. The label is its maximum, not necessarily whats installed. Started checking the actual fuse when everyone went cuckoo over 16mm tails. 😱.

@antonyharding5360 5 месяцев назад

Once i pulled it out and got theatend with indecent exposure . So i pulled my zipp back up..

@sergiofernandez3725 Год назад

Great explanation Gaz.

@GSHElectrical Год назад

Thanks 👍🏻

@percyprod6574 6 месяцев назад

Not all cut outs are like this, some are old and in poor condition, and can can be dangerous, remember it's very possibly on a 400 or 500 amp fuse in the sub, which takes some blowing!

@boboften9952 Год назад

Holds screwdriver on the shank

@scottsweetser4412 7 месяцев назад

✂️✂️ Access ⚡ 🧠 💥 😂😂

@nathd1748 Год назад

I often pull the fuse and keep the tags intact if you know how to

@danvictor3934 7 месяцев назад

Hi service fuses can also be 63 Amps size.

@DofTF 5 месяцев назад

Always best to switch off the load before pulling the fuse.

@montystelevision3238 Год назад

I had an interesting email about pulling the main fuse.

@TheChipmunk2008 Год назад

You did? Was it threatening from the DNO? (I know some can be remarkably petty about it. We always re-seal so there's no danger of abstraction, so no case to answer)

@montystelevision3238 Год назад

@@TheChipmunk2008 No quite the reverse in fact.

@TheChipmunk2008 Год назад

@@montystelevision3238 That is pleasantly surprising ... kudos to that supplier!

@tonyaziz8820 4 месяца назад

I’ve not known one electrician in 30 years not pull them fuses themselves

@Val-lz6ts 3 месяца назад

It is any possibility someone can tell me what kind of income cable size from main supply do they use for 60,80,100A ? P.s what about three phase one?

@C4TBF 2 месяца назад

On a tncs couldnt you use earth as a neutral?

@adamwalsh5285 6 месяцев назад

Surely there would be no arc as the voltage is only 240rms which is not really high enough to create an arc over that distance. It all comes down to voltage clearance, there may be a chance it arcs as you are pulling it out but if you used an insulated tool to do so, I can’t imagine getting a shock from it.

@jamesholdsworth5503 Год назад

Insulation & sheathing

@dannyboi4033 Год назад

How do you pull the fuse out without causing a arc flash then?

@thabisodube 10 месяцев назад

Its how you pull it that counts . I worl for a DNO

@davidfaraday7963 9 месяцев назад

@@thabisodube If there's no current flowing there cannot be an arc however you pull the fuse out!

@swampen85 Год назад

Wow..that alot of Ampers! Here we usualy have 6a 10a 13a 16a 20a 25a in comming power. In Extrem cases 32 amp, like in farms, shops, exc.

@haldo691 4 месяца назад

Yes it is technically illegal to pull the fuse but you will only get prosecuted if something goes wrong. So youll possibly get burns and a court date😂

@dougsaunders8109 Год назад

Noddy question. If the incomer is 6 to 10mm why do you need 25mm tails going to the consumer unit? Not shouting just asking 😊

@FilmSlateUK Год назад

I'm curious where he mentioned that? As I don't remember hearing it in the video.(curious, maybe I blanked it out) Nevertheless, I've been told the incomers are Aluminium, so they may have different amp and heat properties for a given thickness (this is a total guess on my part, not a leccy but I do know most supply's are aluminium now)

@chkhamis101 Год назад

You don’t need 25mm tails, but with the incoming supply only 6mm or 10mm. The cutout fuse would be fused at 60amps. (Scottish power for 39 years)

@dougsaunders8109 Год назад

@@chkhamis101 cheers for the comment. I have 100amp fuse. Power incomer is above ground from a pole. Just does not look big enough for 10mm. But in fairness I am not either a spark or network engineer

@82MLPGTS Год назад

Maybe to allow for future upgrades to the service side? 6mm or 10mm is pretty old mains where I am, 16 or 25 is much more common...

@dononebullen 5 месяцев назад

Bollocks I've pulled hundreds never had a giant arc 😂 I wonder how the meter people do It 😂

@Matt-qn8xj 7 месяцев назад

House bash FC

@Klberts1234 9 месяцев назад

Allowed 😂😂 who going to stop the electric police

@brianlopez8855 6 месяцев назад

Of course you have to pull the Main Fuse out to work safely on the board, but never when drawing ANY power. Incidentally the Power network company is strictly liable for ALL shocks from their side of the meter, and the fine is UNLIMITED. Always sue them.

@jonathanbuzzard1376 4 месяца назад

Yeah no. My none smart electricity meter can disconnect the consumer unit. The consumer unit has to have its switch thrown so there is no load and you need to use a screwdriver to do it, but it is possible. Should be a feature of all electricity meters if you ask me.

@brianlopez8855 4 месяца назад

Definitely no load when removing the 100A fuse to avoid arcing. The only way to be sure there is NO power to the board.@@jonathanbuzzard1376

@brianlopez8855 6 месяцев назад

This sounds like a college lecturer electrician.

@jamesgreen2346 Месяц назад

Its illegal to pull that fuse.....however nobody will ever get convicted when you have to pull that fuse for safety

@82MLPGTS Год назад

Earth for illustration purposes only, obviously... I call that 6mm2, not 16mm2

@user-yh4kl3hx2o 6 месяцев назад

Why are neutral and earth combined???I'm a 1st Yr apprentice???wth???

@GSHElectrical 6 месяцев назад

Earthing Arrangements TN-C-S in a Single Phase Installation Explained in Pictures ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-cPfB34yzLIE.html

@user-yh4kl3hx2o 6 месяцев назад

@GSHElectrical 😪very confusing that 🥺🥺 will have to study harder..thanks for the reply though still trying to understand why combined on supply but not after??

@x13roger80 7 месяцев назад

So earth is Neutral?

@GSHElectrical 7 месяцев назад

On the supply cable 👍🏻

@richardpoulter2146 8 месяцев назад

If there’s no isolator I couldn’t give a flying poo I’m undoing it for everyone safety 😂 if that meter man came back to find a new board and his tag wasn’t cut he think you ducking stupid

@stevem8485 7 месяцев назад

Just make sure there’s no load🤷‍♂️ No load, no arc! My DNO allows them to be pulled providing you get their permission.

@timveres8914 Год назад

All this is basic electrics, shouldn't be anywhere near, no wonder they're trying to legiislate on who is authorised access

@gordonbeaton8131 7 месяцев назад

I know that the concentric you are holding is not live but you should not handle the bare wires even in a demonstration it is bad practice, always wear appropriate protective gloves and treat as if it is a live cable…

@mgabrielle2343 Год назад

Why would any domestic property be drawing 100amp, besides if you first switch off any load, by throwing your main isolator off, there should be no arching what so ever, even drawing 10 amps you don't get much of an arc, so when it comes to refitting you again make sure your 100Amp double pole isolator is in off position, push in your main fuse and Bob is your Uncle. And yes you should never remove the Main fuse when any load is connected through it.

@harrier331 Год назад

Wouldn't be that difficult to do if you had a bunch of high draw items going at once, oven, dishwasher, tumble dryer, kettle, lighting, tv's its possible in a larger house, especially with multiple occupancy. It is more of a failsafe having it that high to stop it from blowing unnecessarily and having to call out the supplier.

@Anythingyoulike2013 Год назад

Electric showers and hobs etc

@francisphillipeck4272 7 месяцев назад

House cutout fuse????? Never head of such a thing, must be something from plasticland

@Brian-rp6kq 2 месяца назад

Turn the board off then there is never ever an ark or a flash that’s nonsense. Pulled 100s of them what would you rather do pull the tails out the meter live instead lol

@tiggerthegreeb Год назад

You literally wouldn't

@gordonbeaton8131 7 месяцев назад

False the distance is to long, if that was the case that an arc would occur the the length of the fuse which is smaller would arc after the fuse blew… thus the fuse would be useless… the only danger is the possibility of getting you fingers on the live tongs of the fuse holder… The fuse receptacles are designed to quench an arc, the plastic is stepped up on the incomer side to increase the distance between the terminal so as you pull the fuse out the distance gets larger and the spark/ automatically is quenched… Stop telling untruths and read the BS spec for the enclosure

@crustyzimmerman3324 11 месяцев назад

Who, you explaining it to? You’d hope pro electricians would already know this. If it’s Jo public - they shouldn’t be touching it…

@dan_austin__873 Год назад

A normal circumstance there would be a breaker switch 😆 l

@ferrumignis Год назад

This is fuse to protect the main incomming supply cable, this goes into the consumer unit where all the breakers and RCDs are mounted to protect individual building circuits.

@dan_austin__873 Год назад

@@ferrumignis In Australia, we have a fuse at the start of the supply (the power pole near the road) which then goes to a 100amp breaker. The fuse is removed with a long pole (~8m).

@lesliehill4516 Год назад

No there is no isolated fitted if the main cable and this set up is inside the property my dno said that they will not do it if you want one you have to have it just before the dis board and after the meter