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Do-It-Yourself (DIY) Question & Answer Forum
Earth or no earth
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<blockquote data-quote="a1spark" data-source="post: 70299" data-attributes="member: 2229"><p>Paul, in a domestic installation of TNS or TNCS you should be able to verify the means of earthing by inspection at the service head { and then measure it}........In a TT system you will have to verify this by physically locating the Rod....If any doubts exist as to the integrity of this conductor along its route then Disconnection of the Main Earth conductor is then usually carried out at the C.U. and a resistance measurement undertaken with a wander lead from this end of the conductor to the rod end ....Earth Rod Connections are required to be readily accessible for inspection, therefore if you cant locate it then you cannot verify its existance ,therefore you cannot state the installation is effectively "Earthed" ,even if your subsequent Ze measurement at the C.U give acceptable readings......it a nutshell ! youve got to be able to see the rod ...!</p><p></p><p>a1 spark</p></blockquote><p></p>
[QUOTE="a1spark, post: 70299, member: 2229"] Paul, in a domestic installation of TNS or TNCS you should be able to verify the means of earthing by inspection at the service head { and then measure it}........In a TT system you will have to verify this by physically locating the Rod....If any doubts exist as to the integrity of this conductor along its route then Disconnection of the Main Earth conductor is then usually carried out at the C.U. and a resistance measurement undertaken with a wander lead from this end of the conductor to the rod end ....Earth Rod Connections are required to be readily accessible for inspection, therefore if you cant locate it then you cannot verify its existance ,therefore you cannot state the installation is effectively "Earthed" ,even if your subsequent Ze measurement at the C.U give acceptable readings......it a nutshell ! youve got to be able to see the rod ...! a1 spark [/QUOTE]
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