Cable size and live wire colour change

[Fleetwood]

If you mean Beko DVC663, the page on the manufacturer's website is here: Beko : Appliances : DVC663

You can download the installation instructions, which say to use 6mm² cable.
No reference to the odd cable spec from the OP. Maybe his cooker has a manual intended for another country?

The oven I'm dealing with is a BDVC 663 and the instruction book is different to the one you show. I wish this one showed using a 6mm tail lol. Cant seem to get a brochure download for the BDVC 663. I went to a shop for a look.

 

[Fleetwood]

Hi Fleetwood,

I have fitted a similar cooker oven to this before, ie. 3X 2.5 mm cable.

I seem to remember that you will struggle to fit 10mm cable, also if I recall the hob was split in two, ie. one 2.5mm to two plates, another 2.5mm to the other two (of four in total) and a 2.5mm to the grill and/or oven, bloody awkward, but doable.

Seeing as how the whole shooting match is wired in 6mm from the DB, you could do as I did and that is fit your 6mm to the centre blocks, and use 6mm or 2.5mm 'jumper links' to the the other two connection blocks, there are three connection points or terminal blocks on the one I did, there is no way you would be able to use 10mm cable to interconnect these.

Or you could just do as the manufacturer recommends and use 3X 2.5mm.

Ps. you will need to change that socket outlet to a cooker connection point.

Went in a shop for a peek at this BDVC663. Could only see one connection box on the rear though.

 

[Fleetwood]

As for diversity , well lets go through it together.....

10.5kw / 230v = 45A

diversity of cooker = First 10A + 30% of remainder + 5A for skt

10A + 11.6 A + 5 = 27A

Therefore 32A mcb on 6mm will be fine.
Also 32A mcb on 4mm will also be fine , installation methods and circuit length permitting.

And wouldn't diversity apply to the tail - even though the manufacturer specifies a 7.5 equivalent.

 

[spark 68]

Went in a shop for a peek at this BDVC663. Could only see one connection box on the rear though.

Yes the one I did had only one connection box, but inside the cover where the cable/s terminate mine had three sets of connection blocks, it is awkward to get 3X 2.5mm to fit, which is why on the second one I just used a single 6mm and 'jumpers'.
On a slightly different model (this one specced 6mm), I noticed the blocks were interconnected internally with a metal comb.

 

[Fleetwood]

What a pain! So if there are only three terminals in the block then I could get by by using one 6mm tail only but if there are three sets they have to be strapped out. Did you use 2.5 for the straps.

 

[spark 68]

What a pain! So if there are only three terminals in the block then I could get by by using one 6mm tail only but if there are three sets they have to be strapped out. Did you use 2.5 for the straps.

It was quite a while ago now, but I don't think 3X 6mm fit in the blocks, so I probably used 2.5mm for the straps, also for the earths straps (sleeved), these straps (links) were only about 40 or 50mm long or even less.

I know the instructions specifying 3X 2.5mm 'tails' adds up to 7.5mm, but you are using only 2.5mm per internal circuit and the supply cable fom the DB to the isolator and connection plate is only 6mm for the rest of the entire run.

 

[Fleetwood]

Dont see the point of it. Why dont they link it all up internally

 

[Des 56]

Dont see the point of it. Why dont they link it all up internally

It may be designed for single and 3 phase

 

[Fleetwood]

Managed to get instruction manual from Beko. Only three terminals to worry about for connection - so no linking Also copy attached of Tech Spec

 

[spark 68]

Hi,

Have look at the fuse/mcb rating row on your Datasheet, it lists either 1X 32A or 3X 16A, as Des said some of these are to cater for threephase supplies.

As I said some have three connections, and some have the metal comb (internal links) already fitted.

The biggest problem trying to fit 3X 2.5mm cables is not where they terminate in the block, or blocks, but where the cable grip needs to hold the cable.

If you think about what I said earlier, in that the distribution circuit is almost certainly 6mm (on a 32A MCB), throughout it's entire length, why would you need 7.5mm for the last metre or so ?

I normally follow the Manufacturer's guidence, but in this case I think something has been lost in translation (Turkish> English), and think some common sense should be applied.

Edit: it would make sense to use 3X 2.5mm cables on 3X 16A MCB's for three phase, and a single 6mm for single phase using a 32A MCB.
Three phase configuration may not neccessarily be for UK use.

Edit II: The 2.5mm the sheet refers to could also be flex, rather than T+E.

 

[jase]

Sorry, I'm confused. At the end of the day you want to end up with a 6mm feed to either a cooker control or a cooker control with integrated socket, and that's it. Nothing else. You don't want any additional cable going to a socket. It should be a radial circuit that terminates at the cooker switch. Or am I misunderstanding?

so how do you connect the cooker then? i normally go from the cooker switch into a cooker outlet plate, in this case i think the cooker outlet plate has been replaced with a socket, probably because the oven is a 13A oven which came with a plug on

 

[somersetsparks]

Depends on the installation method.......4mm can carry 37amps if clipped direct or embedded directly in plaster. 4mm radials on 32a breakers are quite common, usually for socket circuits.

Your question seems to hinge on deciding what size cable you have, something which we can't answer remotely on a forum. Take a sample of it to the wholesaler or even to the big orange shed and compare it to 4mm and 6mm on sale there! Or post some to me and I'll tell you what it is! 4mm is a bit bigger than 2.5mm.....6mm is quite a bit bigger......as I said earlier sparks can usually tell the difference at a glance. You could measure one of the strands and calculate the csa that way, if you have the right equipment (a vernier caliper).

The easiest way to tell the differnce is by the size of the earth, 4mm T+E has 1.5 and 6mm T+E has 2.5.

 

[Fleetwood]

so how do you connect the cooker then? i normally go from the cooker switch into a cooker outlet plate, in this case i think the cooker outlet plate has been replaced with a socket, probably because the oven is a 13A oven which came with a plug on

The socket is going to be replaced with a cooker connection outlet. As I said earlier it was probably for a previous oven with a plug.

 

[Fleetwood]

Thats a useful comment. I've got 6mm but not any 4mm. Never ever used it. For curiosity how many strands does it have?

- - - Updated - - -

 

[Doug]

The biggest problem trying to fit 3X 2.5mm cables is not where they terminate in the block, or blocks, but where the cable grip needs to hold the cable.

If you think about what I said earlier, in that the distribution circuit is almost certainly 6mm (on a 32A MCB), throughout it's entire length, why would you need 7.5mm for the last metre or so ?

3 x 2.5mm cable means a 3 core flex, with each core being 2.5mm. You have one conductor terminated in each of the 3 terminals. It does not mean 3 lengths of 3 core run in parallel.

The alternative mentioned earlier of 5 x 1.5 mm cable refers to a single length of 5 core flex, with 1.5mm conductors, for using with 3 phase supplies and appliances. Again, only one conductor in each terminal.