The house we are buying is supplied by OVO, there is an electrical report saying it needs converting from TT supply to TNCS (PME) due to high reading and need to contact OVO for this. I don't really understand what these means but something to do with earth loop impedance and I am guessing safety cut outs? Are there options for us, does it need a full rewire, I've tried to google it and seems suppliers are often unable to help? Is there some way to check if OVO can upgrade the old tt supply?
Thanks for any advice
Best answer by Transparent
Firstly you're not expected to understand this. But there are several of us here who have enough knowledge and experience to advise
Secondly, it would help enormously if you would fill out your Forum Profile. The answer depends somewhat on where you are in the country. We don't need a street address, but the first part of the post-code or your nearest main town with a population over 15,000 would do.
Thirdly, as you have yet to purchase this house, could you confirm at what stage you are in the process?
- made an offer
- offer accepted and solicitors in contact
- in receipt of vendor's disclosure forms (TA6 & TA10)
- contracts exchanged, & moving date agreed
I have seen this handled incorrectly, resulting in a house that had earthing provided both from a newly-installed earth stake (incorrectly fitted) and via the neutral from the sub-station. That's what we need to avoid happening in your new home!
It is unusual that it's left to a purchaser to make such arrangements unless you've already obtained legal title of the property.
More commonly your solicitor states to the vendor that such work must be completed before you are prepared to exchange contracts, and that you must be supplied with a copy of the signed certification. This will show the results of the earth loop test, and the speed at which the rcd(s) tripped in the house when a leakage test was undertaken.
There is no reason to suggest that the house needs a rewire based on the information you've provided here. But there may be other reasons as to why you think this is so, in which case please say what those are.
You can copy this Topic to your solicitor if you wish. It might help clarify things.
Feel free to re-post here and ask for any further information you require.
You should not try to use technical terms if you're not sure what they mean. Just keep to ordinary English and be as clear as you can.
I hope that helps.