upgrading main earthing?

HappyHippyDad · Feb 21, 2013

Evening all..

Just wanted a bit of advice about Earthing!! I'm not too sure whos responsibility the Earthing conductor is from the earth block to the cable sheath? It's 4mm and before I give out any certificate for a CU change I want to see 16mm. All other bonding and earthing needs upgrading as well but it was just this bit I was unsure about as I thought maybe its the DNO's field?

[ElectriciansForums.net] upgrading main earthing?

Cheers..

telectrix · Feb 21, 2013

DNO earth. leave as is. just work from MET . if Ze is >0.8, contact DNO.

HappyHippyDad · Feb 21, 2013

Thanks Telectrix.

Ze is 0.15. I will upgrade all my earthing and bonding bits to current regs but leave that bit. Am I still able to give a cert?

Octopus · Feb 21, 2013

happyhippydad said:
Thanks Telectrix.

Ze is 0.15. I will upgrade all my earthing and bonding bits to current regs but leave that bit. Am I still able to give a cert?

Yup. why not?

HappyHippyDad · Feb 21, 2013

Murdoch said:
Yup. why not?

Just seems a bit odd.. I'll put down 16mm for earthing on the cert when I've upgraded my bit knowing that theres a 4mm link to the sheath from the earth bar.

Octopus · Feb 21, 2013

happyhippydad said:
Just seems a bit odd.. I'll put down 16mm for earthing on the cert when I've upgraded my bit knowing that theres a 4mm link to the sheath from the earth bar.

Quite agree with you but if the 4mm is fixed to the DNO head you can't change that and from your OP the Ze is fine so I'd be finishing off the cert and raising an invoice!

telectrix · Feb 21, 2013

for an old TNC-S connection to the sheath, that id the dog's danglies. usually it's only about 2.5mm bare.

Des 56 · Feb 21, 2013

If that's an earth wire connected to a ring type clamp with a nut and bolt onto the lead sheath,I would and have changed these countless times,if not ignore me I have a mammoth job to see pictures anyway lol

HappyHippyDad · Feb 21, 2013

Des 56 said:
If that's an earth wire connected to a ring type clamp with a nut and bolt onto the lead sheath,I would and have changed these countless times,if not ignore me I have a mammoth job to see pictures anyway lol

No nut and bolt, firmly soldered into place :smiley2:

thomas-1981 · Feb 21, 2013

Good Ze and firmly soldered all good.

Essex parky · Feb 21, 2013

i would have said its all good so long as the adiabatic checks out ok, works out about 3.2 so your cutting it fine but its within refs

upgrading main earthing?

HappyHippyDad

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telectrix

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HappyHippyDad

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Octopus

HappyHippyDad

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Octopus

telectrix

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Des 56

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HappyHippyDad

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thomas-1981

Essex parky

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