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Oil Pipe Bonding.

Zoomup

A garden oil tank is made of plastic. It is supported on blocks off the ground. Its plastic covered metal oil pipe runs above ground along a wall into a bungalow to the oil boiler. From a visual inspection I believe that the metal pipe is NOT an extraneous-conductive-part, but have not electrically tested it yet.

But…………..there is an earth electrode at the tank position with a length of badly connected green and yellow wire that earths the metal pipe. Why do tank installers do that? So now do I:

a, Remove the earth electrode

or

b, Main bond the metal oil pipe?

Z.

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  • 0

    AJJewsbury: 
     

    Zoomup: 
     

    So, we have a P.M.E. installation with a TT earthed metal oil pipe running to a garden oil tank. Does that contravene 411.3.1.1?

    z.

    Nah, a simple pipe and rod doesn't an earthing system make, not even a TT one. 411.3.1.1 only worries about exposed-conductive-parts (not extraneous-conductive-parts) anyway.

    I reckon you have a PME system and an extraneous-conductive-part - that'll likely need bonding to meet 411.3.1.2.

      - Andy.

    Is it a good idea to P.M.E. bond the metal oil pipe that runs out into the garden, thus exporting the P.M.E. system to outside?

    Z.

Reply
  • 0

    AJJewsbury: 
     

    Zoomup: 
     

    So, we have a P.M.E. installation with a TT earthed metal oil pipe running to a garden oil tank. Does that contravene 411.3.1.1?

    z.

    Nah, a simple pipe and rod doesn't an earthing system make, not even a TT one. 411.3.1.1 only worries about exposed-conductive-parts (not extraneous-conductive-parts) anyway.

    I reckon you have a PME system and an extraneous-conductive-part - that'll likely need bonding to meet 411.3.1.2.

      - Andy.

    Is it a good idea to P.M.E. bond the metal oil pipe that runs out into the garden, thus exporting the P.M.E. system to outside?

    Z.

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