TN-C-C

Terra Neutral-Combined-Combined?

Parents
  • I spy with my little eye - some basic insulation in the meter tails. (The wrap of "L" tapes does not count.)

  • The insulated and sheathed tails are oversleeved where they go into the meter.

  • Ah! I see. Thank you.

  • Well the wiring on the DNO side of  that thing is (clearly!) TNC, maybe  with multiple NE interconnections (probably electrodes) ahead of it.


    Anything downstream of that G/Y will be TNCC-s, which for our purposes is handled as  plain TNC-s.

    As opposed to a DNO network with TNSCS or something where a former TNS supply has been patched in the middle with a section of combined neutral and earth at the joints.

    I'm not sure if its a typo or they are really being more descriptive of their upstream network. My money is perhaps more on a typo.  Note that internal DNO speak often refers to CNE (combined neutral earth) and SNE (separated neutral and earth) rather than using the TN-x format that the international standards and BSI adopt. 
    Mike.

Reply
  • Well the wiring on the DNO side of  that thing is (clearly!) TNC, maybe  with multiple NE interconnections (probably electrodes) ahead of it.


    Anything downstream of that G/Y will be TNCC-s, which for our purposes is handled as  plain TNC-s.

    As opposed to a DNO network with TNSCS or something where a former TNS supply has been patched in the middle with a section of combined neutral and earth at the joints.

    I'm not sure if its a typo or they are really being more descriptive of their upstream network. My money is perhaps more on a typo.  Note that internal DNO speak often refers to CNE (combined neutral earth) and SNE (separated neutral and earth) rather than using the TN-x format that the international standards and BSI adopt. 
    Mike.

Children
No Data