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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
  • I like
    " - Clients' requirements permitting - to your own standard.

    I suppose this alternative could be as simple as a simple dead count of bodies or incidence of fire, though you may run into a little difficulty in a Crematorium or Graveyard. " 
    Unexpected  dead bodies then I suppose..


    Good to see the twizzle of g/y used as a fire proof support to the top left to stop cables dropping out of the trunking during a fire thus meeting AMD3 of the 17th, perhaps more in spirit than in substance.


     I presume the trunking lids are removed as either


    1 they are too full and do not shut or

    2 if you force the cable in it overheats.

    or both ?


    I'm sure it is fine in the sense of no live parts exposed yet and not a C1, and it looks quite like some stuff I have seen recently, but someone should have been shot when they went and left it like that in the 1st place.

    (to be moderate...)

    Anyone who can pass that as satisfactory without at least a C3 is dragging the business into disrepute.  There may well be factors like sharp edges and snag hazards that make damage to the thinner singles far more credible, then it is quickly into  C2 territory.

    In many ways it is more dangerous than that fuseboard....

    M.
Reply
  • I like
    " - Clients' requirements permitting - to your own standard.

    I suppose this alternative could be as simple as a simple dead count of bodies or incidence of fire, though you may run into a little difficulty in a Crematorium or Graveyard. " 
    Unexpected  dead bodies then I suppose..


    Good to see the twizzle of g/y used as a fire proof support to the top left to stop cables dropping out of the trunking during a fire thus meeting AMD3 of the 17th, perhaps more in spirit than in substance.


     I presume the trunking lids are removed as either


    1 they are too full and do not shut or

    2 if you force the cable in it overheats.

    or both ?


    I'm sure it is fine in the sense of no live parts exposed yet and not a C1, and it looks quite like some stuff I have seen recently, but someone should have been shot when they went and left it like that in the 1st place.

    (to be moderate...)

    Anyone who can pass that as satisfactory without at least a C3 is dragging the business into disrepute.  There may well be factors like sharp edges and snag hazards that make damage to the thinner singles far more credible, then it is quickly into  C2 territory.

    In many ways it is more dangerous than that fuseboard....

    M.
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