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Gas pipe electrode

The DNO earth was lost in a supply to a private club premises so an EICR required for licensing purposes could not give a satisfactory designation. The DNO move at the same pace as a dead slug so it was decided to TT the premises. Contractor installed all the necessary equipment. The electrode reading is 120ohms. However, the gas pipe shows just over 1ohm. Nothing else connected to earth,

is this an issue?
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  • John Peckham:

    Morning Lyle


    Firstly the gas pipe cannot be an earth electrode see 542.2.6. If your 120 ohm electrode meets the requirements of Table 41.5 then happy days.

     




    Oh I know that John but no matter what you want to call it, the earth fault current won’t care. So the very exact requirement of said regulation is being met but of course any intention behind it, which presumably relates to explosion risk due to currents flowing on the pipe, whether fault or diverted, is clearly not being met. 

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  • John Peckham:

    Morning Lyle


    Firstly the gas pipe cannot be an earth electrode see 542.2.6. If your 120 ohm electrode meets the requirements of Table 41.5 then happy days.

     




    Oh I know that John but no matter what you want to call it, the earth fault current won’t care. So the very exact requirement of said regulation is being met but of course any intention behind it, which presumably relates to explosion risk due to currents flowing on the pipe, whether fault or diverted, is clearly not being met. 

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