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AAaaahhhhh. The Bonding Question Again.

Zoomup
Do we main bond up an installation if a new gas boiler is to be installed when the old one is removed?


What are extraneous-conductive-parts, and what are not?


Now, to put a spanner into the works, do any issues arise if the copper pipes are "bonded" with solderless copper bonding?


Otto von Guericke would have known this for sure.


Over to you?


Look......




Z.


  • 0

    Zoomup:


    No, the true earthy sections may not be bonded if the copper pipe has glued joints where they are electrically insulating by virtue of the new copper glue (Super Power Solderless Copper Bonding), if it not electrically conducting.




    But if they are insulated by the glue, they will not be true earthy.


     

  • 0

    No, the true earthy sections may not be bonded if the copper pipe has glued joints where they are electrically insulating by virtue of the new copper glue (Super Power Solderless Copper Bonding), if it not electrically conducting.



    You seem to be assuming that the pipework system is only bonded once (e.g. at the stop cock) - if you bond each pipe as it emerges from the (solid) floor (as you probably should) - then glued joints don't matter (or plastic push-fit or section of plastic pipe, or ...)


      - Andy.
  • 0

    geoffsd:




    Zoomup:


    No, the true earthy sections may not be bonded if the copper pipe has glued joints where they are electrically insulating by virtue of the new copper glue (Super Power Solderless Copper Bonding), if it not electrically conducting.




    But if they are insulated by the glue, they will not be true earthy.


     


     




    They may be truly earthy if buried in the ground, under quarry tiles, concrete or screed etc and then emerge into the installation above ground like radiator pipes etc.


    Z.

  • 0

    AJJewsbury:




    No, the true earthy sections may not be bonded if the copper pipe has glued joints where they are electrically insulating by virtue of the new copper glue (Super Power Solderless Copper Bonding), if it not electrically conducting.



    You seem to be assuming that the pipework system is only bonded once (e.g. at the stop cock) - if you bond each pipe as it emerges from the (solid) floor (as you probably should) - then glued joints don't matter (or plastic push-fit or section of plastic pipe, or ...)


      - Andy.

     




    But we don't main bond every pipe as it emerges from the floor do we? We often assume that electrical continuity exists, so if a copper joint is glued as opposed to being soldered, it may be missed, as it will appear to be a neat soldered connection and electrically continuous. I have encounters in many older building that have all sorts of pipes in strange locations, metal water pipes, metal gas pipes, metal oil pipes and other extraneous-conductive-parts, some in bathrooms and shower rooms downstairs. So we can't assume electrical continuity of copper pipes that have been glue jointed.


    Z.


    Z.

  • 0

    Zoomup:

    But we don't main bond every pipe as it emerges from the floor do we. . . 




    In that case you are departing from BS7671. 


    Regards,


    Alan. 

  • 0

    We often assume that electrical continuity exists, so if a copper joint is glued as opposed to being soldered, it may be missed, as it will appear to be a neat soldered connection and electrically continuous.



    Unless you've got X-ray vision you can't see what's under the solid floor anyway - it might be soldered joints, it might be glued, it might be 5m of plastic pipe. Either continuity test and presume it won't change, or bond.

      - Andy.
  • 0

    AJJewsbury:




    We often assume that electrical continuity exists, so if a copper joint is glued as opposed to being soldered, it may be missed, as it will appear to be a neat soldered connection and electrically continuous.



    Unless you've got X-ray vision you can't see what's under the solid floor anyway - it might be soldered joints, it might be glued, it might be 5m of plastic pipe. Either continuity test and presume it won't change, or bond.

      - Andy.

     




    Well if the pipe is plastic we can see it where it emerges above floor level. My point is that where the copper pipes are glue jointed they may appear electrically continuous and catch us out as they may appear to be neatly soldered because conventional copper fittings are used.


    Z.

  • 0

    Alan Capon:




    Zoomup:

    But we don't main bond every pipe as it emerges from the floor do we. . . 




    In that case you are departing from BS7671. 


    Regards,


    Alan. 


     




    O.K. Hands up who bonds earthy extraneous-conductive metal radiator pipes at each location where they emerge from the ground  floor, say from concrete or from under quarry tiles? 


    Z.

  • Former Community Member
    0 Former Community Member
    Do you test them, Z ?


    OMS
  • 0
    The forum grinds on, Alan and OMS still trying to give further training to the guy mystified (after all this time) by simple bonding. We had the guy a couple of weeks ago, despite the might of a DNO spending a lot of time doing extensive tests wouldn't accept their vast experience, threatening to return but like so many others will never be heard of again. Then the guy this week who stands on his bare concrete floor in his bare feet holding on to his live cooker wondering why he gets shocks.

    We have our builder friend still trying to convince himself its ok to draw DNO fuses, bizarrely always on consumers property when there is an "emergency" There are Earthing and polarity tests by non electrical persons. The ever popular what if a neutral conductor is broken, this time buy a poster who was not sure what neutral he was querying. And certainly not the last, has anyone seen a blown cut-out fuse, (and why)!

    Oh for the old days, 

    Regards, UKPN

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