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The stringy thing!

Discussion in 'Electrics UK' started by jeff the gasman, 10 Oct 2019.

  1. jeff the gasman

    jeff the gasman

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    hi sparks
    With five core flex there’s another strand which Is either pvc or thread.
    What’s it for?
    I’m sure at least one of you can settle a debate. Thanks given for best answer.x
    Ps
    Sparks are crap at wiring heating controls.x
     
  2. EFLImpudence

    EFLImpudence

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    It's to confuse plumbers.
     
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  3. sparkwright

    sparkwright

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    I assumed it is a spacer to make the cores sit nicely.

    PS, heating engineers are crap at terminating wires properly.
     
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  4. sparkwright

    sparkwright

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    PPS, a bit of professional rivalry there. :D
     
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  5. charliegolf

    charliegolf

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    Stripping back the sheathing maybe?
     
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  6. pbryd

    pbryd

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    CAT5e has a thread helping to strip back the sheathing.
     
  7. sparkymarka

    sparkymarka

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    Rip cord
     
  8. jeff the gasman

    jeff the gasman

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    That’s what we thought but the stretchy one?
    its not important and earths get in our way so we fook em off.
     
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  10. sparkwright

    sparkwright

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    A clear lack of understanding from a bunch of childish plumbers and alarm fitters.
     
  11. jeff the gasman

    jeff the gasman

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    Relax mate.
     
  12. sparkwright

    sparkwright

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    I'm just having a joke, don't mind me.
     
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  13. securespark

    securespark

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    So does telecomms cable, but I don't think the one in the flex is made of the right stuff for stripping.
     
  14. JohnD

    JohnD

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    Shooting fish in a barrel.

    Seems a bit unsporting.
     
  15. stem

    stem

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    It's to help reduce tension in the centre of the flex and to stop the cores deforming inside the sheath. As the flex...erm... flexes. It reduces the amount that the cores compress inside the bend or stretch on the outside of it. So in a nutshell, as @sparkwright said:

     
  16. SUNRAY

    SUNRAY

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    It's called a 'Filler' and it's job is to fill the gap.
    2,3,4,7 core don't need it as the wires lay together nicely.

    It was used in some of these cable sizes many moons back when it was easier to create a tube for the outer sheath but not needed now with the way the sheath is moulded to the wires.

    Also there may be a thin (fairly fragile) thread or three used to identify the batch or year or something.
     
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