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Discuss Undersized Water bonding advice please. in the Electrical Forum area at ElectrciansForums.co.uk.

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  1. PJH2903
    Offline

    PJH2903 EF Member

    Location:
    Bacup, Lancashire
    Business Name:
    Hudnott Electric Ltd
    Been out to price for another CU change this evening and would appreciate the groups advice.
    When looking at the job I noticed that the water bonding is undersized at 4mm on 25mm tails so should be 10mm which is not a problem as I can include that in the quote.
    Gas bonding has been done and is 10mm.

    The problem I have is when I have gone to look at the main stopcock in the kitchen all the pipework has literally been plastered into the wall so all you can see is the handle of the stopcock. Told the client that I would need to chase the pipework out so I could check and upgrade the bonding accordingly but they would not be keen in this as the kitchen was only redone earlier in the year. The nearest place I could put my bonding without chasing out would be at the kitchen sink which is about 2m away from the stopcock.

    How would you all approach this?
    Thanks
     
  2. telectrix
    Offline

    telectrix Scouser and Proud of It Respected Member

    Location:
    cheshire/staffordshire
    Business Name:
    Telectrix
    what'st he earthing arrangement.TN-S or TNC-S?
     
    • Agree Agree x 1
  3. wirepuller
    Offline

    wirepuller Forum Mentor

    Location:
    south uk
    If you can verify the incomer up to the S/C is plastic then you can probably forget it, otherwise it will need to be upgraded. No getout on that one.
     
  4. Strima
    Online

    Strima Electrician's Arms

    Location:
    St Neots
    Put it where you can then and make a note on the certificate stating client wouldn’t give permission to chase the wall out.

    You can only do so much.
     
    • Agree Agree x 4
  5. wirepuller
    Offline

    wirepuller Forum Mentor

    Location:
    south uk
    Not really relevant, at 4.0mm it's undersized
     
    • Agree Agree x 1
  6. PJH2903
    Offline

    PJH2903 EF Member

    Location:
    Bacup, Lancashire
    Business Name:
    Hudnott Electric Ltd
    TN-S
     
  7. PJH2903
    Offline

    PJH2903 EF Member

    Location:
    Bacup, Lancashire
    Business Name:
    Hudnott Electric Ltd
    Can't see the pipework but the house was built in the late 60's so I would imagine it's going to be metal.
     
  8. Sintra
    Online

    Sintra The Innkeeper Staff Member Admin

    Location:
    Belfast/London
    Give it a quick check to see if it is actually extraneous.
     
  9. wirepuller
    Offline

    wirepuller Forum Mentor

    Location:
    south uk
    Well for TNS the minimum is 6.0mm, not 10mm. If you state on the EIC that there are no signs of thermal damage and you consider it adequate then crack on. Your call, your name on the cert, but realistically it's never going to be a problem despite what I posted above.
     
    • Like Like x 2
  10. PJH2903
    Offline

    PJH2903 EF Member

    Location:
    Bacup, Lancashire
    Business Name:
    Hudnott Electric Ltd
    Think I'll quote for both options and then ring Stroma Tech support in the morning to see what their take would be.
     
  11. littlespark
    Offline

    littlespark Electrician's Arms

    Location:
    Scottish Borders
    "Reasonably practicable"
    In relation to how close to the stopcock you need to be. Its not practicable to chase out the pipe, so you put as close as possible - under the sink. At least it can be seen for future EICR's
     
    • Agree Agree x 3
    • Like Like x 1
  12. Wilko
    Offline

    Wilko Electrician's Arms

    Location:
    Berkshire
    Business Name:
    Wilko Electrics
    Never say never :)
    My home's about that age but at some point they've replaced the water service and there's a nice blue plastic pipe coming up to the stop cock.
     
    • Like Like x 1
  13. Ian1981
    Offline

    Ian1981 Forum Mentor

    Location:
    North east
    You sure it’s 4mm and not 6mm?
     
    • Agree Agree x 1
  14. PJH2903
    Offline

    PJH2903 EF Member

    Location:
    Bacup, Lancashire
    Business Name:
    Hudnott Electric Ltd
    Yes, pulled a bit of 6mm of the van to compare it with to check the size as it looked so small next to the 10mm gas bond.
     
  15. Murdoch
    Offline

    Murdoch Electrician's Arms

    Location:
    Woking
    There are times when common sense has to be the only course of action ...

    Run the 10mm to under the sink .......then it won’t get filled over ... and will be accessible in the future
     
    • Agree Agree x 2
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