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Chemical Cleaning of Blackened Copper Wires.

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After seeing the blackened C.P.C. in the metal back box in another post, I researched this matter and found this video clip showing the cleaning of blackened copper wires chemically, which should not remove too much copper as a mechanical abrasion might.

https://www.youtube.com/watch?v=TfEIEVrmzVw


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  • Former Community Member
    0 Former Community Member

    gkenyon:

    So, we've been discussing cleaning the copper at its termination.


    Does oxidation of the cores along the length of a multistrand cable affect its properties?




     

    Possibly no for the same reasoning, but we never used multi-strand bare copper cabling as the deep earthing electrode under buildings or for earthing at HV or LV in certain substations. This was down to not being able to inspect potential corrosion forming between strands. It always had to be a solid (tape) conductor.


    I'm not sure it would ever be a real problem in the particular application, but once you get a project adopting certain "rules" it' difficult to get change.


    Just for the amusement value, I have asked the question myself of design teams just to see the panic flutter across the face of a design discipline lead who hadn't really considered it.


    Regards


    OMS
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  • Former Community Member
    0 Former Community Member

    gkenyon:

    So, we've been discussing cleaning the copper at its termination.


    Does oxidation of the cores along the length of a multistrand cable affect its properties?




     

    Possibly no for the same reasoning, but we never used multi-strand bare copper cabling as the deep earthing electrode under buildings or for earthing at HV or LV in certain substations. This was down to not being able to inspect potential corrosion forming between strands. It always had to be a solid (tape) conductor.


    I'm not sure it would ever be a real problem in the particular application, but once you get a project adopting certain "rules" it' difficult to get change.


    Just for the amusement value, I have asked the question myself of design teams just to see the panic flutter across the face of a design discipline lead who hadn't really considered it.


    Regards


    OMS
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