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Thread: how much heat can a cat5e cable cope with?

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    disMember M0nkeyb0Y's Avatar
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    Question how much heat can a cat5e cable cope with?

    I stupidly didn't run any when the walls were down in our kitchen and now realise that wireless still isn't up to speed. The floor's still to go down and my only remaining option is to run it in line with the underfloor heating...

    Will it survive getting that hot? Will I need a special (external?) type

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    Senior Member oolon's Avatar
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    Re: how much heat can a cat5e cable cope with?

    Heating is not that "hot" after all the boiling point of water only 100 degrees C, however to be sure I would use a LSZH cable rather than a regular PVC cat 5 cable. However the real trick is put a pipe/trunking/flexible conduct under the the floor rather than burying the cable into the floor. This will give the cable air gap it will also mean you can pull a replacement cable though in the future, make sure you put some wire (1 core of 30 amp ring main cable is perfect, and normally knocking around spare) in to act as a pull through just in case you wish to add more cables in the future. Nice flexible conduct can be bought from screwfix.
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    Re: how much heat can a cat5e cable cope with?

    thanks mate - while since I did this, so:

    solid core/stranded?
    UTP/FTP?

    what's the difference/which should I get?

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    Senior Member oolon's Avatar
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    Re: how much heat can a cat5e cable cope with?

    Socket to socket used solid core, plug to plug use flexible. Solid conducts better however is more likely to break if regularly moved. no point in FTP unless you wish to do cat 6e (10G) which requires it. A nice Cat 5e UTP solid cable is much smaller and flexible than a cat 6 cable (as they have a plastic strengthener). Personally though I am going to install cat 6e cables in my new house (however they are much more expensive). With tubes/conduct you can always upgrade later, allowing for a cheaper install now. Solid UTP cat 5e is what I would recommend, its what I installed at my work (however is not what I am going to do in my home).
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