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Oil Pipe Bonding.

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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.

Parents
  • 0

    mapj1: 
     

    depends - is it accessible to touch indoors ?

    Or outdoors  ?

    The advice from suppliers of fuel tanks generally says earth it, but from a static electricity perspective, so it does not need to be a low impedance.

    Mike.

    The oil pipe that runs from the oil boiler in the house is covered in plastic for mechanical/chemical protection I believe. The outside plastic oil tank has metal showing at its outlet position. There is a valve and filter all touchable and bare metal. I was considering the metal pipe supplied outside main bonded P.M.E. water tap situation..

    The boiler in the house will have a C.P.C. connected to it as it will have a  240 Volt control/pump supply. The metal oil supply pipe will be electrically connected to the oil boiler.

    So, we could have diverted neutral currents running down the oil pipe to the tank and its earth rod. And/or a metal valve at the tank that is above Earth potential and touchable.

    I'd be happier removing the earth rod at the tank, but then what have I missed?

     

    Z.

     

     

     

     

     

Reply
  • 0

    mapj1: 
     

    depends - is it accessible to touch indoors ?

    Or outdoors  ?

    The advice from suppliers of fuel tanks generally says earth it, but from a static electricity perspective, so it does not need to be a low impedance.

    Mike.

    The oil pipe that runs from the oil boiler in the house is covered in plastic for mechanical/chemical protection I believe. The outside plastic oil tank has metal showing at its outlet position. There is a valve and filter all touchable and bare metal. I was considering the metal pipe supplied outside main bonded P.M.E. water tap situation..

    The boiler in the house will have a C.P.C. connected to it as it will have a  240 Volt control/pump supply. The metal oil supply pipe will be electrically connected to the oil boiler.

    So, we could have diverted neutral currents running down the oil pipe to the tank and its earth rod. And/or a metal valve at the tank that is above Earth potential and touchable.

    I'd be happier removing the earth rod at the tank, but then what have I missed?

     

    Z.

     

     

     

     

     

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