Hi all
Got 3 ohms on main incoming sheathed 6 mm earth TN-S, will the DNO upgrade it for nothing or will a charge apply? Or will they make me TT it

Cheers
Grand

If its a genuine tn-s and not a 951 clamp job then it's outside the supply parameters and faulty, ESQCR does not require DNO's to provide means of earthing on existing supplies BUT if they do they must maintain it within the supply type parameters .

Call UKPN / your local DNO report damage to their equipment.

Or TT it

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Regards

Martyn.

Only a mediocre person is always at their best



www.electrical contractors uk.com

and get a reference\job number when you report it.

thanks guys

I had 2 last year with similar or higher readings, rang up Western Power Distribution, who sent a man out within 2 hours for both houses, which was surprising as their previous incarnation (EON?) did not want to know if there was a possible earth fault, they just said make it TT.
Anyway, both of mine were 'loop-in' TN-S systems unbeknown to me, you cannot tell if it is the last in line), where one cable supplies 2 or more houses, and both had loose connections in the house next door, so a simple fix for both.

I''ve had high Ze readings on TN-S supplies twice and both times asked the customer to give the readings over the phone to the company they pay for electricity and on both occasions they came and dug up the road and did what they had to. Super quick response too. No questions, quibbles or costs. I'd always presumed it was their responsibility to supply an earth with an appropriate value.