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Insulated tails used to supply flats

Former Community Member
Former Community Member
We have a block of flats completed in 2017 that have supplies to individual flats in insulated twin and earth.

These cables are fed from a switch fuse and then into a ceiling disappearing into the building fabric.

I no longer carry electrical regs books (Approved sparks but fire specialist) but I did flag up the poor way these cables were installed and questioned if they required a RCD as they were not in metal conduit of armoured cables as I normally see.

Was it not a requirement in a 2015 amendment that all cables such as this were protected/RCD?

Many thanks for taking the time to read.

Paul.
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    Not really, see the article you linked to further up this very thread.

    As it says in so many words, soft skin cables that are shallower than 50mm, need RCD protection and to be in the zones.

    Cables deeper than 50mm, or at any depth protected by earthed armour, or trunking, or whose routes are not concealed, can be routed anywhere, and  do not need RCD.
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  • 0
    Not really, see the article you linked to further up this very thread.

    As it says in so many words, soft skin cables that are shallower than 50mm, need RCD protection and to be in the zones.

    Cables deeper than 50mm, or at any depth protected by earthed armour, or trunking, or whose routes are not concealed, can be routed anywhere, and  do not need RCD.
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