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None standard ethernet trace wires ??

Discussion in 'Electrics UK' started by lucky1313, 22 Feb 2019.

  1. lucky1313

    lucky1313

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    So I normally don't have an issue fitting an RJ45 connector onto ethernet cable but this cable already has a pure white cable twisted around the orange and the same for all the other 3 colours such as green/blue/brown.

    So pure white twisted around the brown, pure white twisted around the orange and so on.

    If I want to create a normal straight through cable how would I wire this ? As normally I'd expect to share the tracer white/orange with the solid blue and the tracer white/blue with solid green or something along those lines, so this solid white already twisted with the solid colours has got me confused.

    Any help much appreciated :)
     
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  3. lucky1313

    lucky1313

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    Here’s are picture
     

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  4. rsgaz

    rsgaz

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    Just treat it as if it does have the tracer colour on it. The fact it's twisted with the other colour means it's the correct one.

    You just have to take a bit more time when you are untwisting them at the ends that you keep them in the correct order, because now you have 4 white wires. Testing afterwards is a must.
     
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  5. lucky1313

    lucky1313

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    awesome thanks so i'm pretending the solid white wire twisted with the orange is actually a white/orange tracer wire ?
     
  6. rsgaz

    rsgaz

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    Yep (y)
     
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  7. lucky1313

    lucky1313

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    perfect thanks :)
     
  8. ban-all-sheds

    ban-all-sheds

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    Good Grief.
     
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  9. mattylad

    mattylad

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    Get some marker pens out while your untwisting them, mark the white ones with a stripe.
    Makes assembling the plug easier as you can get them in order then.
     
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  11. JohnW2

    JohnW2

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    Do we think that the cable was deliberately made like that - and, if so, why?

    Kind Regards, John
     
  12. AndyPRK

    AndyPRK

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    I have some phone cable where is difficult to see what pair the white came from.
    I have to follow it back
     
  13. bernardgreen

    bernardgreen

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    Last edited: 22 Feb 2019
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  14. ban-all-sheds

    ban-all-sheds

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    You're not supposed to untwist the pairs enough at terminations to be able to lose the pairings...
     
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  15. JohnW2

    JohnW2

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    Yes, I'm seen that sort of thing done in 'multi-cables', with a few, dozens, hundreds or even thousands of sets of three (or four) twisted pairs, but I've never seen it done in a 'single' cable with just three or four twisted pairs - have you?

    Kind Regards, John
     
  16. bernardgreen

    bernardgreen

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    Yes, largest cable I recall being involved with was a 102 pair. A lines-man was terminating it onto a tag field in the equipment room where our equipement was installed. We had to stop working and leave the roo, to allow him space to work
     
  17. JohnW2

    JohnW2

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    I've seen bigger cables than that. However, that's not what I asked about - what I asked was ...
    Kind Regards, John
     
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