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Discuss Electrical system using mains water pipe as earth? in the Electrical Forum area at ElectrciansForums.co.uk.

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  1. Rob2017
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    Rob2017 New EF Member

    Location:
    Hemel Hempstead
    I'm looking to get a water meter installed on my property, as I don't use much water.

    My water provider's website says this:
    "When installing meters in properties built before 1996, it may be necessary to replace old metal pipes. Some older electricity systems still rely on the supply pipe providing an 'earth' - this is now prohibited. If you believe your property may have this system, you should contact a qualified electrician to ensure you have an adequate earth."

    Is it a difficult or easy task to identify whether this may be the case? My house was built in 1938 and still has a very old electricity meter (the kind with clockface dials, not even a 'digital' read-out). Is this something a non-electrician could identify, or would I need to get someone out?

    thanks!
     
  2. Murdoch
    Online

    Murdoch Electrician's Arms

    Location:
    Woking
    I doubt a diyer could establish what's going on and thus you need to get a local spark to test the Ze and then Zs to draw any conclusions ....
     
    • Agree Agree x 4
  3. davesparks
    Offline

    davesparks Trusted Advisor

    Location:
    guildford
    Post up a picture of the cutout, meter, fuseboard and anything else fitted in the vicinity, and a picture of your incoming water main and we might be able to advise.
     
    • Agree Agree x 4
  4. wirepuller
    Offline

    wirepuller Trusted Advisor

    Location:
    south uk
    It is extremely rare now to find a water pipe serving as the main earth. I haven't seen it for many years.
     
    • Funny Funny x 1
  5. telectrix
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    telectrix Scouser and Proud of It Trusted Advisor

    Location:
    cheshire/staffordshire
    Business Name:
    Telectrix
    better alter mine at home then. anyone got a spare rod? :D:D
     
  6. Murdoch
    Online

    Murdoch Electrician's Arms

    Location:
    Woking
    I think I've seen more houses without earths recently than those relying on the incoming water pipe!
     
    • Like Like x 1
    • Agree Agree x 1
  7. PEG
    Online

    PEG Trusted Advisor

    Location:
    Manchester
    Yep,pictures of the installation,would assist,but do not always match results of testing.
    I tested a rod on one occasion,which gave poor results,and had only been in a couple of years.
    The same property had an old,redundant steel pipe entering the property,which had fed an oil boiler,once,from the garden. The Ra of which,beat the rod,by a factor of four.

    I also remember several properties in north Manchester,all semis,on one road,which were TN-S,but had sweated solid core singles,to short,roman spear like rods,inserted a few feet away,in the sub-floor space.
     
    • Like Like x 1
  8. sparksburnout
    Offline

    sparksburnout Electrician's Arms

    Location:
    Notts
    You don't do much housebashing then WP ?:)
     
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