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impish15

impish15

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Hi,

Any suggestions what this black cable is coming off the supply's incoming cable? Its a TN-S system, I thought it could be the earth conductor but the cable is black not green/yellow, plus it looks much smaller than 10mm2 plus there is already an earthing conductor coming off the sheath going to the MET.

Any advice welcome
Dennis
[ElectriciansForums.net] Black cable off supplier's incoming cable?
 
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Looks like it’s the original earth connection

later, someone has cut back the sheath and added a pipe clamp and their own earth connection
I would ask the dno to come visit because of a damaged earth and let them repair the cable where it has been cut back.
 
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As James said Looks like the black cable is the original connection point and then some house badger has butchered the sheath and added a pipe bonding clamp and some green yellow earth and possibly disconnected the original black earth at the board
 
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Dustydazzler said:
As James said Looks like the black cable is the original connection point and then some house badger has butchered the sheath and added a pipe bonding clamp and some green yellow earth and possibly disconnected the original black earth at the board
Click to expand...
A little bit of knowledge is a dangerous thing!
 
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telectrix said:
we didn't have green/yellow sleeving back in 1940. there was a war on, you know. it was black so that the German bombers crews could not see it and bomb your house.
Click to expand...
There is a big council estate near me which has black 10mm for the main earth , I simply put it down to the builders using up old cable they had at the time

But the German bomber thing does make sense when you think about it 🙃
 
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Hi James,

Yes the DNO came out and updated the earthing conductor, removing the old black earthing conductor (think it was 6mm2) and the newer 10mm2 cable attached via the earthing clamp. For the sheath he just wrapped it up in electrical tape. Not sure if there is another material he should have used to wrap around instead but he said that's how it's done
 
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I will have to tell the amalgamating tape around the junction box to the alarm cable in my field to the barn that it should not have lasted twenty years, naught tape. 🤣
 
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DPG said:
I've never had an issue with it outside. And it's been used by thousands of satellite and aerial installers over the years.
Click to expand...
There must be different types, the stuff I have used has crumbled.

I just did a quick search on the internet and found some say its ok and some say to cover it in pvc tape.

thedxshop.com

Self Amalgamating Tape 25mm x 10m - The DX Shop Limited

Self Amalgamating Tape 25mm width x 10m reel Perfect for weatherproofing cable connections.
thedxshop.com thedxshop.com


There are different types one being rubber and one being PIB whatever that is.


Self Amalgamating tape is typically made from EPR rubber, EPDM rubber, butyl rubber or PIB (polyisobutylene)

Like this stuff isn't UV resistant

www.hellermanntyton.co.uk

Self-amalgamating Tapes – Low Voltage Rubber Tape HTAPE-POWER600 19x6.7 (711-00200)

711-00200
www.hellermanntyton.co.uk www.hellermanntyton.co.uk
 
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mainline said:
There must be different types, the stuff I have used has crumbled.

I just did a quick search on the internet and found some say its ok and some say to cover it in pvc tape.

thedxshop.com

Self Amalgamating Tape 25mm x 10m - The DX Shop Limited

Self Amalgamating Tape 25mm width x 10m reel Perfect for weatherproofing cable connections.
thedxshop.com thedxshop.com
Click to expand...

Must have been cheap stuff.

Never heard of covering it with pvc tape. The rubber layer formed should be sufficient.
 
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Mike Johnson said:
I will have to tell the amalgamating tape around the junction box to the alarm cable in my field to the barn that it should not have lasted twenty years, naught tape. 🤣
Click to expand...
You have a field and a barn? You kept that quiet.

What ever next - a former owner of property in mainland Europe?
 
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