TN-C-S? No, TN-S. | on ElectriciansForums

Discuss TN-C-S? No, TN-S. in the UK Electrical Forum area at ElectriciansForums.net

HandySparks

-
Mentor
Arms
Joined
Jul 22, 2011
Messages
4,333
Reaction score
2,656
Location
Hampshire
Thought this might interest some. Doing a CU change. Took a quick look at the supply head, saw the earth terminal on the side and assumed TN-C-S. When the chap from EDF turned up to change the meter and connect to my isolator, it turned out to be TN-S. It looks like the underground supply cable is split concentric; you can see the black insulated strands to the neutral terminal and bare copper to the earth terminal.
Ze was 0.17ohm, Z line was 0.18ohm, so testing wouldn't really have revealed what the earthing arangement was. By the way, does anyone know if there's a standard symbol for the line impedance, line to neutral?
[ElectriciansForums.net] TN-C-S? No, TN-S.[ElectriciansForums.net] TN-C-S? No, TN-S.
 
Although they don’t use split concentric now, something sticks in my mind about them using it around that time. we were told about it at EMEB’s training collage, they stopped using it due to the outer serving and neutral insulation getting damaged leaving a TN-C-S connection in effect.
 
I could be wrong about them using it U/G. It was something that was stuck in the back of my mind from EMEB 20+ years ago.

Don't reckon your far off mate, I have seen it fed in ducts before (from ryefield) between these little bungalowish sort of things at a 'scheme' for mentally ill people. I bet theres a few like it but you never see them as most people would assume PME seeing a concentric and a PME style cutout.
 

Reply to TN-C-S? No, TN-S. in the UK Electrical Forum area at ElectriciansForums.net

News and Offers from Sponsors

  • Article
Join us at electronica 2024 in Munich! Since 1964, electronica has been the premier event for technology enthusiasts and industry professionals...
    • Like
Replies
0
Views
309
  • Sticky
  • Article
Good to know thanks, one can never have enough places to source parts from!
Replies
4
Views
832
  • Article
OFFICIAL SPONSORS These Official Forum Sponsors May Provide Discounts to Regular Forum Members - If you would like to sponsor us then...
Replies
0
Views
930

Similar threads

  • Question
A bit like saying plumbers makes good electricians. 🥴
Replies
10
Views
2K
  • Question
How did it go?
Replies
12
Views
2K

OFFICIAL SPONSORS

Electrical Goods - Electrical Tools - Brand Names Electrician Courses Green Electrical Goods PCB Way Electrical Goods - Electrical Tools - Brand Names Pushfit Wire Connectors Electric Underfloor Heating Electrician Courses
These Official Forum Sponsors May Provide Discounts to Regular Forum Members - If you would like to sponsor us then CLICK HERE and post a thread with who you are, and we'll send you some stats etc

YOUR Unread Posts

This website was designed, optimised and is hosted by untold.media Operating under the name Untold Media since 2001.
Back
Top