Unusual Cable type

[craig1000]

Hey everyone,
Came across a unusual type of cable today that i have never seen or heard of before & wondered if any light could be shed for me?
Its a mains feed from a meter position in a block of flats & on first glance looks like a 6 or 10 mm 3 core swa but is actually a outer sheaf & no armour with a single core line conductor (red) i would estimate 16mm & then 7 single core neutral conductors (black) i would estimate 1 or 1.5 mm & also 4 strands of uninsulated CPC!

 

[lamb]

Split concentric cable. Very common for lateral mains from ryefield board to cut outs in flats.

 

[huntos33]

Feed from meter but to what ? i must say ive seen anything like this did you get a picy ?

 

[trev]

Just as Lamb said, it's split concentric
Just as Tom Jones said, it's not unusual

 

[Richard Burns]

This type of cable Split concentric cable to BS7870

 

[craig1000]

Cheers guys, im sure its not unusual if you have come across it a few times, myself however for the first time, ten years in the game & was like 'HHHHMMM hello then whats this beauty? ' ;-)
I shall also research it now but can you tell ,me its advantages or why it would have been used?

 

[huntos33]

ive never seen one in 20 years ...:thinking2:

 

[telectrix]

:75:i've never seen the loch ness monster, but that doesn't mean it does not exist.

 

[huntos33]

:75:i've never seen the loch ness monster, but that doesn't mean it does not exist.

Lol im sure it does exist odd that you can go so long not seeing it ever, guess it depends on the sparking you do

 

[telectrix]

it must exist because it has relatives. i know, i was married to one of them.

 

[huntos33]

it must exist because it has relatives. i know, i was married to one of them.

The cable or the monster ?

 

[telectrix]

never thought of cable, otherwise i could have scrapped her instead of binning the *****

 

[huntos33]

never thought of cable, otherwise i could have scrapped her instead of binning the *****

Cables the way, most profitable end to any relationship

 

[Spudnik]

Use it all the time for sub mains and is so much easier than SWA.

Only where RCD protection is not required though.

 

[Knobhead]

Not very well made off
View attachment 12453
Why the DNO was using split concentric instead of their normal concentric I don't know.

 

[Spudnik]

I understand they normally use it for tns nowadays

 

[Geordie Spark]

Not very well made off
View attachment 12453
Why the DNO was using split concentric instead of their normal concentric I don't know.

Not very tidy at all & it looks like at least one of the green / yellows has had a haircut too !!

 

[Engineer54]

It maybe OK for the utility companies to use direct buried, but not in general installations. They have their own codes/regulations, whereas electricians follow BS7671. As these cables have no means of mechanical protection, they will need an additional means of mechanical protection, such as being run in a duct when being used in underground installation runs....