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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

Parents
  • dcbwhaley:

    Can the smart meter distinguish between the tails being disconnected or the main switch on the CU being opened?




    The smart meter detects the meter cover being removed to gain access to the tails terminals and sends an alert. It also detects the power to the meter going away (e.g. power cut or head fuse removed) and sends an alert. In the latter case if the DNO gets alerts from the whole street it assumes a power cut and comes out and fixes it. If just one house, it sends out someone to ask questions.


    It won't know about the CU main switch being open.


Reply
  • dcbwhaley:

    Can the smart meter distinguish between the tails being disconnected or the main switch on the CU being opened?




    The smart meter detects the meter cover being removed to gain access to the tails terminals and sends an alert. It also detects the power to the meter going away (e.g. power cut or head fuse removed) and sends an alert. In the latter case if the DNO gets alerts from the whole street it assumes a power cut and comes out and fixes it. If just one house, it sends out someone to ask questions.


    It won't know about the CU main switch being open.


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