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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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    Also note that if we didn't have the 50mm rule (or something similar) then a cabled chased into a wall on one side would also be considered to be concealed within the wall when looking from the other side as well - and so would have to be within zones w.r.t. that side of the wall too - which probably isn't exactly convenient if you didn't particularly want accessories in the same position on both sides of the wall. Note the exception for walls less than 100mm thick when you can readily see both sides - such an approach would be tricky for things like party walls where you don't have access to the other side.

       - Andy.
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    Also note that if we didn't have the 50mm rule (or something similar) then a cabled chased into a wall on one side would also be considered to be concealed within the wall when looking from the other side as well - and so would have to be within zones w.r.t. that side of the wall too - which probably isn't exactly convenient if you didn't particularly want accessories in the same position on both sides of the wall. Note the exception for walls less than 100mm thick when you can readily see both sides - such an approach would be tricky for things like party walls where you don't have access to the other side.

       - Andy.
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