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Ring Main at Consumer unit

Former Community Member
Former Community Member
My daughter has just had an electrical safety check done and I suspect that the electrician has been over zeleous..

Would anyone care to comment.


There is no grommet where the meter tails enter the consumer unit and the outer insulation stops just short of the knockout.

He has graded this C1.   Now my opinion is that that does not present an  an immediate threat to the safety of personell

It needs fixing but surely only a C2?


More intriguing.  He gives a C3 to the ring circuit because the two legs enter the consumer unit through separate knock outs.  I can't find that in the regs


And finally an old chestnut which has been discussed before.   A C3 because two radial "circuits" are served by a single breaker..  I have always argued that the definition of a circuit is that it is served by a single breaker.  Certainly if both radials were brought to a junction box outside the CU and then connected to the breaker by a single cable it would meet the definition of a radial..


Thanks for your attention

  • Sorry BOD, I don't agree that you have identified the problem.

    Kind regards

    David
  • Former Community Member
    0 Former Community Member
    There are other recorded defects and I intend to rectify most of them.

    But that does not detract from the fact that the tails to the CU are a C2 not a C1
  • Former Community Member
    0 Former Community Member
    You are welcome to a copy.  How do I get it to you?

    My daughter has already paid for the report and she is of a character that abhors fuss.

    I will  try to persuade to use another electrician to any remedial work.   I am competent to do most of it myself but am unhappy to deal with live meter tails


    I think that a  new CU with RCBOs  would be a worthwhile upgrade even if what you say is tru
  • dcbwhaley:

    I am competent to do most of it myself but am unhappy to deal with live meter tails


    You gave the impression of knowing what you are about until mentioning dealing with live tails. I just wouldn't even if my livelihood depended upon it. My life is worth more than my livelihood.


    Just pay the DNO to isolate and reconnect when the work is done.


  • Former Community Member
    0 Former Community Member
    Sorry BOD, I don't agree that you have identified the problem.


    I was questioning the selective aspects David, not the competence aspect !


    Regards


    BOD
  • Former Community Member
    0 Former Community Member
    I am always puzzled why the DNO do not provide an isolator switch.  Every other service into my house - water, gas, oil - has an isoliating valve.  Is pulling the DNO fuse an acceptable way of isolating?
  • The question isn’t if the installation is shoddy, it’s just how shoddy is it?


  • ebee:

    "Is there any chance of overloading here?" OCPD should take care of that no matter how many radials make that circuit


    Indeed, but we are considering a reliable circuit with no nuisance tripping off of say fridges or freezers.


    314.1


    133.2




    Z.


  • Chris Pearson:
    dcbwhaley:

    There is no grommet where the meter tails enter the consumer unit and the outer insulation stops just short of the knockout.

    He has graded this C1.   Now my opinion is that that does not present an  an immediate threat to the safety of personell

    It needs fixing but surely only a C2?


    I agree - C1 would be for bare copper and potentially isolate or fix there and then, but either way, it needs to be fixed. IMHO tails should enter through a gland for security. The lack of the outer sheath troubles me more than the lack of a grommet.




    "There is no grommet where the meter tails enter the consumer unit and the outer insulation stops just short of the knockout."


    Does this mean that bare copper is visible and could be touched, or does it mean that the insulated and sheathed tail has its sheathing cut short and the inner insulation is showing, perhaps to identify the tail's function?


    I think that we need to be told.


    Z.


  • dcbwhaley:

    I agree.  I have advised her to have a new 10th edition CU fitted with more ways so that each "circuit" can have its own fuse. Having upstairs and downstairs lights on one breaker is not good practice if not a code


    Each circuit on a separate R.C.B.O. is the best most reliable option.


    Z.