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Morning! Hi to briefly introduce myself, I’ve done my 2365 L2&3 and hoping to get enough money together to do my AM2 this year. I also have my 17th and am registered with Stroma only since last year. I’m also a long time reader of the forums, learnt absolutely tonnes.

I’ve a question I hope you can help with. I’m upgrading some of the electrics at my brothers place, getting rid of old rewireable fuseboard and putting in a new consumer unit, new ring final for his ground floor. However, when I went to check the bonding to the utilities, there wasn’t any at all. I’ve checked both supply pipes where they come into the building and at the stop cocks. I thought maybe I just couldn’t find them, but there’s nothing in the MET apart from cpc’s from the 5 circuits and a 6mm earthing conductor to an earth block next to the supply cable. So obviously I’m installing bonding now as well, and here’s my question.

It’s a TN-S system, with a couple - literally two strands of armour that seemed to have been unravelled from the supply cable when it was installed and connected to the same earth block. I can post a photo in a few hours if needed.

My gut is screaming out that there’s no way those two strands are capable of carrying any decent PFC?

Everything I’ve read says it’s the DNO responsibility to sort this, but I’ve also read that if you call them they’ll just say stick a Tenby clip on it - which I don’t think is right either as it's likely to come loose.

So am I being paranoid about the armour earthing and where do I stand when speaking to the DNO?

Thanks in advance! Mike
 
That’s not a few strands of the armour, it’s a tinned copper braid.
I've had several jobs with TN-S systems provided originally by NEEB now Northern power grid. When their earth has deteriorated well over 0.8 ohms.(lead sheath)and has been reported, they've said you'll have to pay for a connection or provide your own mean of earthing.
 
I'm a cable jointer contracting to the electric board and looking at that c/o there's multiple things that aren't up to current spec, firstly the it's an old style c/o which are getting replaced and it looks like vir tails so contact your dno and tell them you want the c/o changing and tails replacing then when they are replacing the c/o they'll probably give you a new earth connection
 

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