Posting a message to the forum will remove the above advertisement
  1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.
  2. angel While you're here, would you mind checking out our Electrician's Insurance section to see if we could save you a few quid? - Specifically our Van Insurance Deals and Public Liability Insurance Deals. Thanks for supporting the forum! angel

    5% Discount from Electrical2Go.co.uk for ALL members! - Click Here

Discuss Bonding gas/water yellow and blue in the Electrical Forum area at ElectrciansForums.co.uk.

Please make sure you checkout our forum sponsors, many do discounts for members and, they keep the forum free to use.
  1. Houndogg10
    Offline

    Houndogg10 EF Member

    Location:
    Hampshire
    Hi I am recently qualified and still have a lot of learning/reading to do but Blue plastic waterpipe incoming, seems to always be a grey area with electricians I work with, me personally wouldn’t bond it..... Although we have to prove that in the plumbers install their is no copper going to earth?? Can someone enlighten me on this please

    Many thanks..... and go easy on me lol
     
    • Creative Creative x 1
  2. telectrix
    Offline

    telectrix Scouser and Proud of It Trusted Advisor

    Top Poster Of Month

    Location:
    cheshire/staffordshire
    Business Name:
    Telectrix
    basically, you need to determine if any metal water pipes are extraneous. i.e. are they connected physically to the mass of earth. to do this, you set your MFT to IR test. test between the suspect pipe and your MET. if the reading is > 22k Ohms, then it does not require bonding.
     
    • Like Like x 3
    • Agree Agree x 1
  3. Houndogg10
    Offline

    Houndogg10 EF Member

    Location:
    Hampshire
    So does that mean only if they are accessible? And what if the blue plastic goes straight to white plastic? Would we have to take the bond over to the copper?
     
  4. telectrix
    Offline

    telectrix Scouser and Proud of It Trusted Advisor

    Top Poster Of Month

    Location:
    cheshire/staffordshire
    Business Name:
    Telectrix
    not if the copper complies with my previous post.
     
    • Like Like x 1
    • Creative Creative x 1
  5. Ian1981
    Offline

    Ian1981 Electrician's Arms

    Location:
    North east
    It’s highly unlikely that a mains water pipe entering a property in blue plastic then to copper will introduce an earth potential to the property unless said copper pipework is perhaps buried at some point in the ground.
    Also when I ever see plastic incomers joining to copper say in commercial buildings and flats,the copper eventually joins to plastic again so it’s never necessary to provide protective bonding.
     
    • Like Like x 1
  6. Houndogg10
    Offline

    Houndogg10 EF Member

    Location:
    Hampshire
    So where does metal frame houses/flats fall into this?
     
  7. kenny7askew
    Offline

    kenny7askew Regular EF Member

    as per telectrix advice,you test it
     
  8. Midwest
    Offline

    Midwest Electrician's Arms

    Location:
    Oxfordshire
    Of course there is the other viewpoint. In some point in the future that pipework after the plastic might be come ''extraneous' through refurbishments etc, so if you don't bond it from new (and it might get 'earthed' from parallel paths), and 10 years down the line it does become extraneous and requires bonding, how do you get a cable from the front to the back of the property. Just bond, and forget.
     
  9. spinlondon
    Online

    spinlondon Trusted Advisor

    Location:
    Harlow Essex
    Yay, let’s increase the number of conductive parts that will become live in the event of a fault.
     
    • Agree Agree x 3
  10. kenny7askew
    Offline

    kenny7askew Regular EF Member

    interesting viewpoint but you cant bond to start with if its plastic and you cant really forecast what might happen in future
     
    • Like Like x 1
  11. Leesparkykent
    Offline

    Leesparkykent Super Moderator Staff Member Trusted Advisor

    Location:
    Kent
    When the 18th is published it looks like they have put it in black and white that if the incomer is plastic then doesn't need bonding.
     
    • Like Like x 3
  12. Ian1981
    Offline

    Ian1981 Electrician's Arms

    Location:
    North east
    It’s strange that every new build I see has now ditched the bonding to the water pipe as it’s plastic everywhere anyway but the gas still connects to the wall mounted meter outside in yellow plastic pipe.
    Enters the property in copper but can’t see how it’s extraneous in that way?
    Perhaps when the 18th is published they might not provide bonding to the gas anymore?
     
    • Agree Agree x 1
  13. Pete999
    Offline

    Pete999 Trusted Advisor

    Location:
    Northampton
    Business Name:
    None
     
  14. Midwest
    Offline

    Midwest Electrician's Arms

    Location:
    Oxfordshire
    Thought that might generate some replies, by the way I wasn't suggesting bonding a plastic pipe.

    All most every domestic dwelling I work in with a plastic water service and copper internals, has the copper bonded. This isn't new builds. Now that may be 'cos we've always done it that way, or ignorance, or because it was tested and found not to be extraneous.

    So not bonding the metal element of a water service is correct, if when tested, is found not to be extraneous. What then if additional appliances (requiring cpc) are connected, which could change the results of that test, or the pipework is altered with the same result.

    How do you now get a suitable cable to that point to bond it. How many of you test an existing install, to see if the existing pipework is extraneous, removing the water bond if necessary?

    Not saying I'm right, just interested in the views of my more learned colleagues.
     
  15. davesparks
    Offline

    davesparks Trusted Advisor

    Location:
    guildford
    The point that is often missed in this kind of discussion is that the regulations apply to far more installations than domestic, and there are more things than just gas and water pipes which can need bonding.
     
    • Like Like x 2
    • Agree Agree x 1
Loading...
Similar Threads - Bonding water yellow Forum Date
twin and earth for water bonding? Electrical Forum Sep 29, 2018
18th edition and bonding to gas and water New Member Introductions Sep 20, 2018

Share This Page

Electricians Directory Post a Domestic Job Post a Commercial Job