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Discuss Mapping existing ring main in the DIY Electrical Forum area at ElectrciansForums.co.uk.

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  1. DB73
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    DB73 EF Member

    Location:
    Dartford
    Hi, I am a first time DIY poster - hoping to navigate the tricky line between getting a bit of a steer in the right direction and not requesting step by step instruction.

    I am hoping to DIY the electrics on my extension, and in advance of the project I am trying to map the order of outlets on the existing ring mains. I am aware of the area of work R1 + R2 / 4 etc etc testing for faults and reckon this is DIYable (once a professional has repaced my old fuses with a CU, and added a big off switch just past the meter). My question is can anyone point me in the right direction for establishing in which order the outlets on the ring main run. I can think of a painstaking route of disconnecting two at a time so that anything else dead is then known to be inbetween the two, and if nothing else is dead then they must be adjacent, always keeping a look out for extra wiring suggesting a spur - am I on the right lines or is there a better method, perhaps with a multi-meter?

    Incidently I am undertaking 20 days City and Guilds training in May (yes, am aware of the limitations and that this might make me an enhanced DIYer, but certainly not a sparks). I am super cautious on all isolaton matters - hence new isolation switch for whole house.

    Sincere thanks to all the eperienced posters who are willing to share their expertise.
     
  2. Murdoch
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    Murdoch Regular EF Member

    Location:
    Woking
    If you are planning on doing your extension wiring, best you discuss this with your local building control if you want them to issue a completion certificate .....
     
  3. littlespark
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    littlespark Electrician's Arms

    Location:
    Scottish Borders
    Duplicate thread from earlier this week?
     
    • Agree Agree x 1
  4. Murdoch
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    Murdoch Regular EF Member

    Location:
    Woking
    Earlier today ...
     
  5. DB73
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    DB73 EF Member

    Location:
    Dartford
    Yes, but was on wrong forum earlier today, so have made my farewells there and moved this to DIY forum
     
  6. Murdoch
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    Murdoch Regular EF Member

    Location:
    Woking
    You won't get step by step guides in here either
     
  7. DB73
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    DB73 EF Member

    Location:
    Dartford
    No, and that is a fair enough rule. I did not think that is what I am asking for - (I was hoping for a couple of sentences to point in the right direction)... but apologies if that is clearly what I am doing and I am sure I will get the hang of what is acceptable by keeping quiet and reading others' posts for a bit.
     
  8. Cid
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    Cid Active EF Member

    Location:
    London
    Well you are the King of your castle. Nothing wrong with wanting to find out out what lurks beneath the surface.

    I would invest in a bosch wall scanner. Very handy in locating live cables in the wall. Lift floors if necessary. With a bit of common sense it's not that difficult to find out.
     
    • Informative Informative x 1
  9. GMES
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    GMES Hairy and proud Staff Member Admin

  10. telectrix
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    telectrix Scouser and Proud of It Respected Member

    Top Poster Of Month

    Location:
    cheshire/staffordshire
    Business Name:
    Telectrix
    @OP.a bit late, but.... you could ( if competent) , after isolation take readings R1+R2 from each socket. as you move from CU round rfc, readings will increase.
     
    • Agree Agree x 1
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  11. DB73
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    DB73 EF Member

    Location:
    Dartford
    Thanks for the replies - penny has dropped. Christ that was simple and am feeling a bit foolish now! I was focussed on R1 + R2 remaining constant as proof of connections, and forgetting the fact that one will increase and the other decrease, as you work your way around - this is what comes of reading, but not yet physically doing it. Will crack on now - thanks again.
     
  12. farmer
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    farmer EF Member

    Location:
    Munster
    Go way amd get an electrician
     
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  13. DefyG
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    DefyG Regular EF Member

    Location:
    South East
    I thought it was a ring circuit!
    R1+R2 should be the same wherever its is measured on the ring, not increase or decrease!
     
  14. chris gray
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    chris gray Electrician's Arms

    As a rfc the readings should remain constant. However if you link out l&e on one of the legs and make it into a radial, the readings will adjust according to circuit length
     
    • Useful Useful x 1
  15. DefyG
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    DefyG Regular EF Member

    Location:
    South East
    Of course but didn't think we were supposed to give step by step instructions!
    The OP doesn't really say why he needs to know?
     
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