RING GUIDE, per socket wire thickness/AMPAGE?

[srands]

HI

On socket wire reels (Twin & Earth, Prysmian or any make really), the thickness determines, the associated AMPAGE, hence:
1.0mm = 15A
1.5mm = 20A
2.5mm = 27A
4.0mm = 36A
6.0mm = 46A
10.0mm = 63A
16.0mm = 85A

HOWEVER, what about the approximate RINGED VALUE of each of the SOCKET WIRE TYPES (Twin & Earth)?

In my 17th Edition IEE Guide, only the most common SKT WIRE thickness RINGED, is mentioned:
1.5mm RINGED = 20A x 1.6 = 32A
2.5mm RINGED = 27A x 1.2 = 32A

What about the approximate RINGED AMPAGES of:
1mm, 4mm, 6mm, 10mm, 16mm?

Does anybody have a reliable RING GUIDE? Or anybody have any good approximate figures, from socket wire reels, electrical websites, reference guides, etc?

Cheers

Stephan

 

[Penance]

I'd like to see you terminate 10 or 16mm in a socket!

 

[DurhamSparky]

depends what type of socket he is terminating in!!!

 

[Penance]

Lol, fair comment.

 

[somersetsparks]

I was always under the impression that the minimum cable size for a ring circuit was 2.5mm ?
Dunno where this comes from just something people have always told me, ive never owned my own copy of the regs, when you work for a big company most of these things are worked out for you (well... most of them).

 

[telectrix]

and how much current can a ringed pigeon stand. it's not in the recipe and i don't want it to be overcooked

 

[mayfair]

Here in Spain on some installs we have 25mm singles entering the DB, So this goes straight into the top of the general switch .....only problem is 25mm dont fit, Whats available in UK for this problem. The spanish give the cable what they call a haircut ie trim it to get it in. what happens in UK please

 

[Deleted member 26818]

You can obtain solid copper adapters, shaped a bit like a T.
The lower part fits into the terminal, and the upperpart has usually two holes for connecting a lug attached to the conductor.
I believe there are also pin crimps that can be used.

 

[somersetsparks]

Pin Crimps Would be No.1 Choice, quite a lot of big jobs specify all cores are crimped now, even if its just a bootlace crimp!

 

[mayfair]

will search for them...........Just ordered my first wago connectors today from CPC in Preston looking forward to having a play. Its amazing the things I cant get here.

You can obtain solid copper adapters, shaped a bit like a T.
The lower part fits into the terminal, and the upperpart has usually two holes for connecting a lug attached to the conductor.
I believe there are also pin crimps that can be used.

 

[mayfair]

Tried bootlace but still wont fit, All singles into the MDB/RCDs here have to have bootlace busy looking for pin crimp? on google. Found it! never seen ones that except 25mm but will look

Pin Crimps Would be No.1 Choice, quite a lot of big jobs specify all cores are crimped now, even if its just a bootlace crimp!

 

[srands]

Hmm so does anybody know the RING AMPAGE of SKT WIRE, for all of these thicknesses?:
1mm, 1.5mm, 2.5mm, 4mm, 6mm, 10mm, etc

Also since in some cases, it won't be known what appliances will be used, their wattage and typical length of use.
So how to estimate MAX WATTs for each MCB circuit, per SOCKET? I guess some sort of SOCKET AVERAGE MAX per square metre.
My references guides mention:
2.5mm, 32A Radial = 20m2
4mm, 40A Radial = 50m2
4mm, 40A Ring = 100m2

Can anybody add to this? That is a more substantial reference guide, or from a really valid source?

Cheers

Stephan.

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LIGHTING CIRCUIT DIAGRAMS

RING & RADIAL SKT DIAGRAMS

MULTIMETER GUIDE

 

[somersetsparks]

Just checked bag in box they are cembre part no. a 5-p 16 mate

 

[MarkieSparkie]

Strand ampage is slang, if you want to taken seriously it pays to use the correct terminology:- CURRENT is the quantity (its symbol is I) and it is measured in AMPERES (its symbol is A).

Take a look at BS7671, Table 4D2A, Reference Method 3 (Clipped Direct), Two core Cable (with or without CPC), Single Phase. This is the original source of the values you quote.
Looking at the columns and you will see that current rating of the conductors depend on a number of factors, how the cable will be erected (Reference Method), how many core are combined in the cable, material the conductor is made from, ambient temperature, conductor operating temperature and the cross sectional area of each conductor.
If you look at the whole of appendix 4 you will see a whole heap of parameters that one would have to consider to answer your question.
Therefore what probably appeared to you to be a straight forward simple question, is in fact much more complex and the reason you didn't get the snappy answer you were expecting.
It can all look quite complex and daunting, but don't give up, keep asking questions, the art is ask specific questions rather than all encompassing ones.
Hope this helps.

 

[Risteard]

I was always under the impression that the minimum cable size for a ring circuit was 2.5mm ?

If MICC is used then a ring final circuit can be wired in 1.5mm2 cable.