Earth bonding to gas and water

Discussion in 'Electrics UK' started by Carloss, 12 May 2011.

  1. Carloss

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    Hello,

    Would be grateful for people opinions on this situation I am in....

    The Client has requested a 17th edition consumer unit upgrade due to a child receiving an electric In the house. I visited the house to get an idea of what's going on etc.. the gas and water main have a 6mm earth tagged onto them. However, the client has limited funds and can only afford a fuseboard change including testing. Will take an extra day to upgrade the bonding to 10mm as laminate flooring/concrete floors are everywhere! With the supply characteristics that's present, would I be able to leave it at 6mm. Tncs system, main fuse 60a 1361. Or could I put it as a limitation on the certificate? Upgrade of equipotential bonding to water main and gas main in 10mm could not be carried out at present???

    Carl
     
  2. holmslaw

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  3. Carloss

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    Thanks, sorry for sloppy posting, using my phone to write this!

    Would it be acceptable if I carried out a continuity check on the bonding if I get readings below 0.05ohms would be acceptable? taking into consideration the type of earthing system and fuse size?

    Thanks,
    Carl
     
  4. holmslaw

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  5. matt1e

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    They may be ok if the system is TT
     
  6. londonboy

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    The installation is TNCS.

    I beleive you can verify 6mm by using adabatic equation.
     
  7. holmslaw

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  8. matt1e

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    :oops:

    allright I'll go and clean me specs :LOL:
     
  9. holmslaw

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  10. ebee

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    TNC-S (PME) requires 10mm min (even then your supplier might require more)
     

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