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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:

    Its only 240v, Z.  When I was with the CEGB they worked on live 400,000v lines.  With no deaths :-) :-)


    If it shorts by your unprotected face you could be blinded. Is it really worth the risk? It is the current and explosive force that causes the injuries. Did you wear P.P.E. whilst working for the C.E.G.B?


    Look......IET Forums - Live working (theiet.org)


    Quote: "In case you were wondering, I am not against the use of PPE. I work in the electricity supply industry on the distribution side. We routinely use insulated gauntlets for both HV and LV, as well as full face shields. We do not work HV live (although we do replace pole-mounted HV fuses live), but usually work LV live. Our company procedures and safety rules cover the inspection (before each use) of the PPE and its routine replacement. The procedures also give advice on when the supply must be isolated."


    Z.


Reply
  • dcbwhaley:

    Its only 240v, Z.  When I was with the CEGB they worked on live 400,000v lines.  With no deaths :-) :-)


    If it shorts by your unprotected face you could be blinded. Is it really worth the risk? It is the current and explosive force that causes the injuries. Did you wear P.P.E. whilst working for the C.E.G.B?


    Look......IET Forums - Live working (theiet.org)


    Quote: "In case you were wondering, I am not against the use of PPE. I work in the electricity supply industry on the distribution side. We routinely use insulated gauntlets for both HV and LV, as well as full face shields. We do not work HV live (although we do replace pole-mounted HV fuses live), but usually work LV live. Our company procedures and safety rules cover the inspection (before each use) of the PPE and its routine replacement. The procedures also give advice on when the supply must be isolated."


    Z.


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