Three Phase Flex - two black cores?

[DNS1]

Hi chaps,

Spent today repairing a load of 63A and 125A three phase flexes.

When taking the damaged plugs off I was somewhat surprised to find that two of the cores were the same colour...

Can anyone explain why I've got two black cores and one brown? I was expecting to find black, brown and grey...

 

[Plonker 3]

Seen a 5 core all white

Omly ever seen a 7 core all whte and that was a SWA.

 

[shanky887614]

Omly ever seen a 7 core all whte and that was a SWA.

i havent seen a 7core but have dragged in a 19 core and 27pair (last was a special order)

 

[UNG]

usually they have numbers on that are hard to see, it might be further down the cores than you can see.

or maybe not, a friend bought some twin that was brn,brn.

he only knew which was which because he used the top as one and bottom as two (using the manufacturer's markings on sheath)

Never used the twin brown but if it is the same as the twin red used to be it was identified by looking at the core ends one core had an inner white tracer in the insulation

Twin brown (and twin red previously) is an Irish thing really. Not sure why as it's a better way of doing things.

Not sure why you suggest it is an Irish thing it's lack of use in the UK IMO is down to a lack of knowledge of the different forms a cable is available in and also the fact that the councils housing stock was transferred to housing associations who mainly specced it's use. Finding 6241Y and 6181Y in 1.0mm and 1.5mm as well as twin brown these days can be difficult yet it's use was quite common a number of years ago. The biggest thing against twin brown is it is usually a bit more expensive due to low production runs

 

[Knobhead]

i havent seen a 7core but have dragged in a 19 core and 27pair (last was a special order)

27c? Special order? It’s a bog standard cable.

 

[shanky887614]

27c? Special order? It’s a bog standard cable.

not from an electrical wholesaler tony.

we use a small independent, get it delivered direct from manufacturer to site

and 27 pair not core.

e.g. 54c not 27

 

[Risteard]

Not sure why you suggest it is an Irish thing

Just because no-one here would dream of overmarking brown and blue, and indeed in the south such practice is prohibited under ET101.

 

[Knobhead]

not from an electrical wholesaler tony.

we use a small independent, get it delivered direct from manufacturer to site

and 27 pair not core.

e.g. 54c not 27

I’ve only worked for multinationals where any cable out of the ordinary came direct from the manufacturers if it wasn’t stores stock. Most cables would be on stock although I did stump them when I needed 450m of 500mm[SUP]2[/SUP] cambric singles in a hurry.

Local wholesalers wouldn’t get a look in as they seemed to have this weird idea they could charge for their service.

 

[UNG]

Just because no-one here would dream of overmarking brown and blue, and indeed in the south such practice is prohibited under ET101.

Ok not well up on ET101 so that's a new one on me