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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.


Parents
  • 0

    OMS:

    Do you test them, Z ?


    OMS




    Testing is very important. 131.1 is concerned with safety to persons, livestock and property. So, yes I do test as required to ensure safety. I come across oil boilers that are fed from oil storage tanks in gardens some distance away, perhaps up to 30 or 40 metres in some cases. The oil feed pipe can then appear as a bare copper pipe or may be a copper pipe inside a plastic protective pipe, but the copper pipe is exposed at the ends. At the house a fuel filter is installed on the outside of the house at low level, the bare copper pipe then enters the house through a wall or underground. I definitely main bond the copper pipe at the entry position. This copper fuel pipe may test as non-extraneous but in damp or wet conditions may test as an extraneous-conductive-part.


    An I.E.T. publication once suggested that dry radiators yet to be filled with water may test as a non-extraneous-conductive-part, but once filled with water and rust inhibiting chemicals may become an extraneous-conductive-part, even if fed by plastic pipes, so testing dry may give different results to testing when filled.


    Safety first.


    Z.







    Z.

Reply
  • 0

    OMS:

    Do you test them, Z ?


    OMS




    Testing is very important. 131.1 is concerned with safety to persons, livestock and property. So, yes I do test as required to ensure safety. I come across oil boilers that are fed from oil storage tanks in gardens some distance away, perhaps up to 30 or 40 metres in some cases. The oil feed pipe can then appear as a bare copper pipe or may be a copper pipe inside a plastic protective pipe, but the copper pipe is exposed at the ends. At the house a fuel filter is installed on the outside of the house at low level, the bare copper pipe then enters the house through a wall or underground. I definitely main bond the copper pipe at the entry position. This copper fuel pipe may test as non-extraneous but in damp or wet conditions may test as an extraneous-conductive-part.


    An I.E.T. publication once suggested that dry radiators yet to be filled with water may test as a non-extraneous-conductive-part, but once filled with water and rust inhibiting chemicals may become an extraneous-conductive-part, even if fed by plastic pipes, so testing dry may give different results to testing when filled.


    Safety first.


    Z.







    Z.

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