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M.I.C.C. in House. Why?

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Today I came upon some orange served M.I.C.C. cable running from the loft in a bungalow to a single metalclad socket. It may have been an immersion heater supply, but the copper cylinder has been removed. It appears to be quite big, perhaps 4.0mm2 or 6.0mm2.

 

I wondered just why it was installed in a domestic bungalow.

 

Apprentice training by an electrician father perhaps. Used as it was available. But the extra work terminating it would not warrant using spare cable from your works would it?

 

Bemused of Norfolk.?

 

 

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    The old pyrotenax, basically the same stuff, is/was rated at 750 or 1kv depending on the type.

    In reality it is the ends and termination creepage distances that limit performance - the magnesium oxide is good for a lot more - several kV.

    The strange thing is that when it is made, it is assembled short and fat, with essentially wires and insulator beads in a chunky tube and then crushed and pulled to size, and the insulator and the cores remain very much in proportion as the cross-section is progressively reduced.

    The chaps in Wrexham use split MgO blocks, as they can make a continuous length, but this MICC vidoe shows the process for a fixed length tube.

     

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  • 0

    The old pyrotenax, basically the same stuff, is/was rated at 750 or 1kv depending on the type.

    In reality it is the ends and termination creepage distances that limit performance - the magnesium oxide is good for a lot more - several kV.

    The strange thing is that when it is made, it is assembled short and fat, with essentially wires and insulator beads in a chunky tube and then crushed and pulled to size, and the insulator and the cores remain very much in proportion as the cross-section is progressively reduced.

    The chaps in Wrexham use split MgO blocks, as they can make a continuous length, but this MICC vidoe shows the process for a fixed length tube.

     

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