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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:

    And you shall be told. :-)

    The sheathing has been cut short by about 20mm and the coloured insulation is visible. No copper is visible and there is not room to get a dcb-standard finger into the knockout


    So we have about 3/4 inch of inner insulation showing just before entry into the consumer unit.  Just possible to get a finger in there to touch the inner insulation. But who would want to? Most sensible people do not go prodding and poking at live electrical equipment.  Is it really accessible so that 412.2.4.1 applies?


    You could cut a grommet, install it carefully with insulated tools or insulating gloves, then wrap some good quality electrical insulation tape around the bare insulation (of the correct colour of course) and Bob's yer uncle.


    This issue has become a storm in a tea cup.


    Z.


Reply
  • dcbwhaley:

    And you shall be told. :-)

    The sheathing has been cut short by about 20mm and the coloured insulation is visible. No copper is visible and there is not room to get a dcb-standard finger into the knockout


    So we have about 3/4 inch of inner insulation showing just before entry into the consumer unit.  Just possible to get a finger in there to touch the inner insulation. But who would want to? Most sensible people do not go prodding and poking at live electrical equipment.  Is it really accessible so that 412.2.4.1 applies?


    You could cut a grommet, install it carefully with insulated tools or insulating gloves, then wrap some good quality electrical insulation tape around the bare insulation (of the correct colour of course) and Bob's yer uncle.


    This issue has become a storm in a tea cup.


    Z.


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