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Wall Cavity Wiring.

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Good morning on this bright and sunny start,


                          Q. Which regulation(s) specifically prohibit(s) the installation of cables in brick and block cavity walls within the cavity?


in a, Older premises?


    b, Newer premises?


If regulations exist, what reasons are provided for the prohibition? Or are we just concerned about chemical damage of cable insulation if the cables are in contact with some types thermal insulation?


Z.
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  • 0
    Some years ago I was plumbing a kitchen sink that was under the centre of the window,  there was a double socket either side of the window. 


    I had installed the kitchen and having set the sink into the work surface and having plumbed the hot and cold supplies to the tap I drilled through the back board of the sink base unit then started to vote drill through the cavity wall to run the 1 1/2" waste pipe out.


    Having drilled through the inner block well the core drill hit the socket circuit cable that was hanging forming a centenary loop in the cavity between the sockets either side of the window. It was one of those WTF moments as there was a flash and a bang in the cavity of the wall with me hanging onto the drill with a core and a 600 mm extension on it.


    Bearing in mind the kitchen installation was virtually complete I then had to waste half a day getting a replacement cable installed. 


    There is absolutely no way anyone could have foreseen that drilling that hole halfway between the sockets under the window could possibly result in a cable being damaged in the wall cavity,  


    Life's like that, people pull cables into the most unlikely places then they get damaged. 


    Andy
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  • 0
    Some years ago I was plumbing a kitchen sink that was under the centre of the window,  there was a double socket either side of the window. 


    I had installed the kitchen and having set the sink into the work surface and having plumbed the hot and cold supplies to the tap I drilled through the back board of the sink base unit then started to vote drill through the cavity wall to run the 1 1/2" waste pipe out.


    Having drilled through the inner block well the core drill hit the socket circuit cable that was hanging forming a centenary loop in the cavity between the sockets either side of the window. It was one of those WTF moments as there was a flash and a bang in the cavity of the wall with me hanging onto the drill with a core and a 600 mm extension on it.


    Bearing in mind the kitchen installation was virtually complete I then had to waste half a day getting a replacement cable installed. 


    There is absolutely no way anyone could have foreseen that drilling that hole halfway between the sockets under the window could possibly result in a cable being damaged in the wall cavity,  


    Life's like that, people pull cables into the most unlikely places then they get damaged. 


    Andy
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