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TT to TN-C-S

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I advised a customer to have a new P.M.E. earth terminal installed by U.K.P.N. This was done. When U.K.P.N. attended and tested, the men found a weakness/imperfection/fault at the top of the nearest pole. A repair was carried out.


In my area many premises have old T.T. earthing. As a mater of course I would recommend that all T.T. premises be converted to TN-C-S where permissible, to improve the safety of the installation. 


Today I visited a house under renovation. The earthing conductor to an earth rod had been disconnected in the garden. The whole house was very dangerous due to an old and unearthed installation. The old Voltage operated earth leakage circuit breakers were unreliable. I disconnected many circuits.


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Z.
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  • 0
    Update to original post.


    The metering people are attending in April, and about a week later U.K.P.N. is attending to install the new P.M.E. earth terminal.


    The house has got two nice earth rods at present. Big galvanised water pipes. One was installed at the front of the house where the earthing conductor runs from the meter position through an air brick to the front garden, very handy. The second is located right at the back of the property and is wired in 10.00mm2 green and yellow, which at first I suspected was a bonding cable.


    Then there is a redundant rod in the front  garden near to the first rod, These have been exposed due to trenching to prevent "rising damp".


    I might join the two front rods together and retain them.


    Z.
Reply
  • 0
    Update to original post.


    The metering people are attending in April, and about a week later U.K.P.N. is attending to install the new P.M.E. earth terminal.


    The house has got two nice earth rods at present. Big galvanised water pipes. One was installed at the front of the house where the earthing conductor runs from the meter position through an air brick to the front garden, very handy. The second is located right at the back of the property and is wired in 10.00mm2 green and yellow, which at first I suspected was a bonding cable.


    Then there is a redundant rod in the front  garden near to the first rod, These have been exposed due to trenching to prevent "rising damp".


    I might join the two front rods together and retain them.


    Z.
Children
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