UNDERSTANDING CLASSES of ELECTRICAL CONDUCTORS

UNDERSTANDING CLASSES of ELECTRICAL CONDUCTORS - lets get counting!

Рет қаралды 41,440

Күн бұрын

If you look at a datasheet for cables and wires you'll often see conductor class mentioned?
The class of conductor determines how flexible the cable is, the diameter and the resistance.
The subtle difference between the different types can have a dramatic effect on the specification of an electrical installation.
== 🕐 Time Stamps - Cut to the action 🕕 ==
00:00 Electrical conductor classes as defined in IEC 60228. (bs en 60228)
01:02 Common cables and their conductor classes.
01:59 Class 1 conductor - solid copper
03:00 Class 2 conductors - min 7 strands
03:35 Class 5 conductor - e.g Tri-rated cable and flex
04:10 How many strands in a 16mm sq class 5 conductor
05:23 Maximum strand diameters to make a conductor and resistance
05:54 Class 6 conductor - very, very flexible!
06:30 How many strands in a 16 mm sq class 6 conductor
07:46 Missing strands in sub-standard cables
08:40 Stranded conductors have a slightly higher resistance
09:10 Conductor diameters
10:07 Flexible conductors on RCBO"s and consumer unit connections.
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❌ This content on this channel is for electrical professionals.❌ ==================================
📹 Presented by
Gary Hayers - Editor eFIXX
Gordon Routledge CEng MIET - Technology Editor eFIXX
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#efixx #electricalinstallation
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Пікірлер: 71

@acespark1 2 жыл бұрын

I found if you put plenty of current through any cable at a certain point it becomes a class 6, usually just before it burst into fames !

@efixx 2 жыл бұрын

😂🔥❤️‍🔥

@thomasbonse 10 ай бұрын

Hmm, I found the conversion from classes 2, 5, and 6 to class 1 to be easier when undersized for the current. Unfortunately, the insulation rarely survives; and even when it does, it tends to be both brittle and far darker than the original color.

@gadgetman36 2 жыл бұрын

Gary counting the strands! 🤣🤣🤣🤣 Send your cables in to Gary! 🤣🤣🤣🤣

@GSHElectrical 2 жыл бұрын

Happy to help out with my counting skills 🤣

@gregmcallister4862 Жыл бұрын

Great content…. Keep them coming 👏🏼👏🏼👏🏼👏🏼

@joelniimensahafoteylewis4475 2 жыл бұрын

I love your lesson. And I'll like to see a video of explaining cable sizes and where to use them

@Bari_Khan_CEng_CMarEng 10 ай бұрын

Cracking bit of comedy thrown in there with counting the conductors!

@APSuk2 2 жыл бұрын

I love a little sprinkling of copper in my Pot Noodle.

@Drones_and_more 2 жыл бұрын

If iron is good for us then why not a bit copper, anyone know the RDA for copper lol

@shahzad1225 22 күн бұрын

Thanks for Very Informative Video.

@GSHElectrical 2 жыл бұрын

4:29 comedy GOLD 🤣

@thattoolguy9432 2 жыл бұрын

it's a real interesting subject when you get into class cables on larger diameter , esp in the industrial sector when a lot of machinery comes fitted with class 5 and 6 cables and the spark has used a standard copper lug , different lugs are used for class 5 and 6 .. i had the pleasure of doing a course on BS7609 & BS 7727 .. that would make a good video :)

@efixx 2 жыл бұрын

Yes 👍- a great idea - we’ll put it on the list!

@pauljones908 2 жыл бұрын

We find that on pump cables which are all class 6. Had one connected to a VFD via a JB and it caught fire due to the incorrect lug and crimp used

@thattoolguy9432 2 жыл бұрын

@@pauljones908 i see it a lot .. over crimps under crimps , lugs that are different to tool being used.. it's a whole can of worms waiting to be opened.. similar to when efixx first showed ferrule crimpers and then you saw a lot of youtube sparks fitting them on class 1 and 2 cables ... which made me chuckle ... loads!! it's a great course if you do enough of it..

@millomweb 2 жыл бұрын

@@pauljones908 Is this what ferrules do in C/Us ? Is that why they catch fire ? LOL

@millomweb 2 жыл бұрын

@@efixx Anyone know of a source of class 6 or 5 50mm^2 twin cable ?

@scottl8137 2 жыл бұрын

Being an electrician here across the pond in the states makes this video so much more interesting. We deal alot with your brown, blue, and green yellow color setup over here quite a bit though

@efixx 2 жыл бұрын

Just remember Scott its colour 😂

@scottl8137 2 жыл бұрын

@@efixx hahaha, 😁😅

@nate_d376 2 жыл бұрын

You guys kill me. Lmao. Even though I'm across the pond, and there's some differences here, I do learn from you. Thanks!

@johnwarwick4105 Жыл бұрын

Industrial electrician for over 40 years and I found that interesting, especially the core counting, done that got the tea shirt😂 class 5/6 we used to refer to as welding cable. Try getting a lug on some 240mm2. Seen class 5 cable that was used in machines sliding back and forth shoot the cores out through the insulation, it’s amazing what constant flexing can do to a cable, you wouldn’t believe it

@brianhewitt8618 2 жыл бұрын

interesting, thanks guys

@Electronics-Rocks 2 жыл бұрын

Nice refresher

@efixx 2 жыл бұрын

Thanks for commenting and watching 👍🏻

@Enonymouse_ Жыл бұрын

The jacket of the cable should define strand count although the print can be hard to read. Lots of interesting stuff here, thanks for making these.

@Minifig666 2 жыл бұрын

Perplexed by the missing classes 3 and 4. Seems they were removed when IEC 180 was replaced in 1966, but I haven't been able to find out what they used to be!

@efixx 2 жыл бұрын

Update us when you have 👍🏻

@1idd0kun 6 ай бұрын

@@efixx We still use class 4 in my country (Argentina). To make a quick comparison, a class 4 2.5mm2 cable has 19 strands while its class 5 counterpart has 40 strands. Our regulations describe class 4 as flexible cable while class 5 is described as extra flexible. I'm actually a bit surprised you guys don't have class 4 in the UK.

@GSHElectrical 2 жыл бұрын

6:52 comedy GOLD mark 2 🤣🤣

@dominicdodd9759 2 жыл бұрын

Interesting. So given manufacturers use class 5 and 6 inside a CU what's the reason we can't buy (double insulated) class 5 meter tails?

@AfifAhmad 2 жыл бұрын

How does the AC skin effect work on finely stranded cables?

@bakunawa1691 2 жыл бұрын

Informative video, I sub. Tnx, I learn something.

@dibyajyotidash7158 2 жыл бұрын

Please tell me if we can use class 5 copper wire in residential purpose with Air conditioner

@cag9284 9 ай бұрын

I've seen electricians use Ferrules ls on class 2 conductors, would you guys do this?

@AaaaBbbb-mp8wd 9 ай бұрын

Good’ay! Question - can class 2 conductors be compacted?

@dringonator6911 2 жыл бұрын

🤣🤣🤣 “Gary can you count the number of strands”

@Enonymouse_ Жыл бұрын

The electrical systems and switching that you guys use in homes in the UK is far more complex than what is considered standard in most homes built in the last 10 years. North America doesn't have hardly any electronics or solid state equipment installed in the load center as standard equipment, that will eventually change though. It's still fairly primitive with magnetic fault switches and stuff.

@carlpodd 2 жыл бұрын

Something I have noticed in recent years is the upgrading of wires within the home but the mains supply has not changed why?

@msstardust7979 Жыл бұрын

So a cable 5 would be NYAF (H07V-K)? If so what would 6 be please?

@glenwoofit 2 жыл бұрын

Where do I send my cables in to get counted? I think I need to send them in to you to be counted before I use them. I can count to 10 but after that I'm screwed, I don't have the same skills as you guys.

@efixx 2 жыл бұрын

😂

@Chris_In_Texas 2 жыл бұрын

I would think they would want to use ferrules on those class 5 and 6 conductors going into a CU, as not to damage those extra thin wires.

@abdulseaforth6930 2 жыл бұрын

Gentlemen, Where would I utilise this information? I'm going to listen again in case I missed anything. Gaz, you impress me . Boss Gordon gave you several tasks to do and you just put your head down and got on w/ it. I dare say, you had something to say in your mind, but you kept it contained... sort of. Keep up the good work please.

@efixx 2 жыл бұрын

It’s useful when looking at specifications for cable on data sheets. It’s well known in eFIXX that Gary never grumbles 😖

@alfredtrietsch215 Жыл бұрын

Counting strands vs coffee drinking? You might do a calculation instead: 16mm² / π(0.21mm/2)² is about 462 strands at least in order to comply to the standard. An easy way to bundle large numbers of strands is by doubling up several times, resulting in powers of 2 in total. In this case 512 strands might be practical to manufacture.

@seemorebeer2848 Жыл бұрын

😂😅 LMAO ! Informative and entertaining ! Well done chaps, hope you didn’t lose any wayward strands didn’t end up in your Pot Noodle 🤦🏼‍♂️😖

@efixx Жыл бұрын

Thanks for the great comment

@WASEEMAKRAM-tp3np 4 ай бұрын

Which conductor class is better and why...Can you make a video on it

@efixx 4 ай бұрын

Try this 👉kzfaq.info/get/bejne/rb5dgbx0qsy6nJ8.htmlsi=AysYljmTf7OXUZXr

@pit3835 Жыл бұрын

whats the advantage of so many strands that big strands in stranded wire?

@efixx Жыл бұрын

More strands makes the cable more flexible - used for battery leads when the cable needs to be moved frequently

@johnburns4017 2 жыл бұрын

Class 1, solid, is used for 2.5mm cable, which is intended for _fixed_ installations. But we use 2.5mm solid to connect up sockets, which by definition need to be pulled in and out, meaning the wires to the back of a socket should be Class 4 or Class 6 - _flexible._

@toddbod94 Жыл бұрын

Sockets are fixed, you’re only pulling them off for maintenance, not regularly.

@johnburns4017 Жыл бұрын

@@toddbod94 The cables *are* solid. Not meant at any time for flexible applications, no matter how infrequent. Solid cables on the terminals of a socket can have stress on them (maybe give a poor connection or pop out) while flex cable does not. Use the right cable for the job. Having the solid cables in Wagos, completing the ring, in the backbox and flex to the sockets from the Wagos is the best way. Quicker as well.

@millomweb 2 жыл бұрын

I've tried catching feral cables but they always run away. Boom Boom (as Basil Brush would say)

@AugustinSteven Жыл бұрын

I would have cut of a meter of cable without the insulation and weighed them all. Then weighed an individual strand. Dividing the smaller into the larger will give the total number of strands. A lot quicker and probably more accurate than counting.

@johnaphone Жыл бұрын

Quicker to look at the datasheet. Besides, do you really believe he counted them

@benjurqunov 11 ай бұрын

Why a meter ? Any length of conductor would work. Regardless, extremely accurate scale would be needed to accomplish this. Btw, When I sell scrap wire the buyer weighs a length with, then without insulation. Payment is based on percentage copper of the total weight.