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https://www.askthetrades.co.uk/cgi-bin/yabb/YaBB.pl DIY Forum >> Electrical Questions >> tncs system https://www.askthetrades.co.uk/cgi-bin/yabb/YaBB.pl?num=1281765199 Message started by dace on Aug 14^th, 2010, 6:53am

Title: tncs system
Post by dace on Aug 14^th, 2010, 6:53am

in a Tn-c-s system when as in circuit measurement does the earth and neutral become seperate ie line to neutral not line to earth neutral. as the neutral and earth are combined at the consumer input.

Title: Re: tncs system
Post by sparxxxx on Aug 14^th, 2010, 9:04am

They split at the service head or cut out.

Title: Re: tncs system
Post by CWatters on Aug 14^th, 2010, 9:05am

I'm an electronics engineer not an electrician but...

The neutral wire has resistance/impedance so moving any distance away from the point where earth and neutral are combined _may_ effect the measurements you make... but it will depend on what measurement you are making.