Cables too hot?

Discussion in 'Cables & Switches' started by ojock, Feb 23, 2005.

  1. ojock

    ojock
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    Hi,

    Hope someone can help a DIY novice

    Just for background info:

    The plasterboard in my house is attached to concrete blocks using the dab&dob method, I will be mounting my plasma above the fireplace mantelpiece using 8*M10*100mm expanding wall bolts to secure. I’ve measured the temperature at where the plasma will seat and there isn’t a problem with heat, I guess with the decorative mantelpiece sticking out quite a bit it seems to help to act as a deflector.

    However, I’ve chased a channel for the cables down the middle of the wall from the plasma and found that when I touched the exposed bricks with the fire on full, it was certainly very hot, not enough to burn me but had to take my hand off within a few seconds.

    So now I’m concerned about the wires getting too hot. I had plan to use white trunking from B&Q, would that be enough to protect them ? If not, is there something that will help ?

    Cheers

    Peter
     
  2. eviljohn2

    eviljohn2
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    Doesn't sound like a great situation to me. You should contact the cable manufacturers and find out what temperature they're rated up to, it's a commonly used specification so they shouldn't mind letting you know.
     
  3. Mark Grant

    Mark Grant
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    Hello Peter,

    Is there any way you can measure the temperature of the bricks?

    Maybe use an oven type thermometer or whatever has a high enough range.

    Belden PVC insulated cables have a maximum operating temperature rating of 75C, I guess most makes of cable will be similar to give you some idea.

    Hope that helps !

    Mark.
     
  4. ojock

    ojock
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    Thanks to both guys. I'll check the wires & bricks tonight.

    Anyone else have idea on the thermal properties(is that the right word?)/temperature tolerance for the white trunking in general ? I suppose I could purchase one and heat it up & see.
     
  5. eviljohn2

    eviljohn2
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    Again, you can probably find specifications for the white trunking. Try the MK site to give you an idea of what it's likely to be. I would guess it will be similar to the cabling at around 70 or 80degC. :)
     

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