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Cable Sheathing Material "LSZH"

Dutch of the Elm
Hi,


I hope someone can assist. 


I am interested in studying the materials used to sheath "LSZH" / "LSF" cables, particularly ones such as twin and earth.  Can anyone confirm what kinds of compounds are typically used to sheath these cables?  Specifically LSF/LSZH ones, so not PVC.  I had assumed XLPE but a number of manufacturers seem to state "LSZH" sheath etc alongside XLPE insulation, so I am lead to understand the sheath is not XLPE... or am I overthinking it?  I have tried to asking a manufacturer but I have not had a clear answer.  


Looking forward to some answers.


Thanks,

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  • 0

    OMS: 
    Sure  - reliance on a standard that has identified and repeatable test criteria has to be better than some vague description of performance like "LSF"

    As for gel filled cable, then I tend to not run it more than say 1 - 2m into a dedicated Building Entry Facility (BEF) before terminating it and converting to a more sensible indoor grade cable spec. Make the BEF as fire sterile as possible, and wrap it up in 60minute protection - not usually a problem if you consider your comms to be important to you

    Regards

     

    That's explained something that has puzzled me for years, inexplicable joints just before entry when I always thought another few meters would have seen the cable to its final destination without jointing 200 pairs up a ladder. 

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  • 0

    OMS: 
    Sure  - reliance on a standard that has identified and repeatable test criteria has to be better than some vague description of performance like "LSF"

    As for gel filled cable, then I tend to not run it more than say 1 - 2m into a dedicated Building Entry Facility (BEF) before terminating it and converting to a more sensible indoor grade cable spec. Make the BEF as fire sterile as possible, and wrap it up in 60minute protection - not usually a problem if you consider your comms to be important to you

    Regards

     

    That's explained something that has puzzled me for years, inexplicable joints just before entry when I always thought another few meters would have seen the cable to its final destination without jointing 200 pairs up a ladder. 

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