M
Maff
Laugh if you like, I am new to this, is a TN-S sytem classified as a PME system, also is it possible for domestic houses sharing the same supply (same street) to be a mix of TN-S and TN C-S
Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
Discuss Pme in the Electrical Wiring, Theories and Regulations area at ElectriciansForums.net
Thanks, I thought so, I have TN C-S, but 5 houses along the row my neighbour is TN-S???
Hi Maff,
They can laugh at us both. I'm possibly newer than you - I'm on my electrical course at present (just done my 17th and Part P) and still learning so the experienced guys will set me straight if I've understood incorrectly. PME (protective multiple earthing) is TNCS. The Neutral and Earth (protective conductor is the correct terminology I think) are combined until they enter the house where they seperate. TNS is a system where the two functions , Neutral and Earth are entirely separate conductors. I would have thought from the same supply they would all have to be the same. The only doubt in my mind is that I remember there being a gradual transition from TNS to TNCS and nobody has explained how this transition is achieved. A question for my tutor tomorrow.
Too slow again - Telectrix has already responded.
Yes it is quite possible to have a mix of TN-S and TN-C-S, and even TT in the same street.
The systems are generally only upgraded, at the request of homeowners, and often there is a charge for doing such.
I think you've answered your own question. It's not your kit to repair, so get the DNO in to sort it, they're being paid to provide the supply.if you come across a TN S system where the earth clamp has failed/come undone would you repair/replace it yourself or get the DNO to do it as it is their kit
Thanks, I thought so, I have TN C-S, but 5 houses along the row my neighbour is TN-S???
Reply to Pme in the Electrical Wiring, Theories and Regulations area at ElectriciansForums.net