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Unknown Cable.

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Evnin' All,


A customer of mine has supplied some of his own cable. It appears to be 2.5mm2 copper twin and earth. It has a grey tough oversheath, (difficult to strip) marked DESCO P. It has a bare centrally placed C.P.C. The live conductors are insulated with Brown and Black coloured insulation. No B.S. markings.


Does anyone know its origin or anything else about it please?


Z.




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  • 0
    Brown and black will be continental, which makes it unusual, as round cable is generally preferred to flat.


    IF you really want to use  it, please verify the cross section and that it is real copper with an end to end resistance test,

    expect no more than 19 miliohms per meter length, per mm2 of cross section - that is a single 1mm core 1m long, or a 2.5mm2 core 2.5m long etc is no more than 19milliohms.

    More than this and its either not pure copper, or not the cross-section you were hoping for.


    and also megger it, ideally at 1kV. Desco in the states make ESD management kit, the cable may have a deliberately leaky insulator.

    Assuming it passes  then you will need to blue sleeve one core, presumably the black one, as the neutral at the ends.



    Where does the customer claim it has come from ?

    I'd be wary.
Reply
  • 0
    Brown and black will be continental, which makes it unusual, as round cable is generally preferred to flat.


    IF you really want to use  it, please verify the cross section and that it is real copper with an end to end resistance test,

    expect no more than 19 miliohms per meter length, per mm2 of cross section - that is a single 1mm core 1m long, or a 2.5mm2 core 2.5m long etc is no more than 19milliohms.

    More than this and its either not pure copper, or not the cross-section you were hoping for.


    and also megger it, ideally at 1kV. Desco in the states make ESD management kit, the cable may have a deliberately leaky insulator.

    Assuming it passes  then you will need to blue sleeve one core, presumably the black one, as the neutral at the ends.



    Where does the customer claim it has come from ?

    I'd be wary.
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