Isnt all neutals connected to earth at the very begining anyway?No thats not what i mean , forgot war and all that. Why is it that a in one house a tncs system here can be connected to neutral but in another house it cant?
Discuss TNCS - USING NEUTRAL AS EARTH IN BOARD in the UK Electrical Forum area at ElectriciansForums.net
Isnt all neutals connected to earth at the very begining anyway?No thats not what i mean , forgot war and all that. Why is it that a in one house a tncs system here can be connected to neutral but in another house it cant?
Our network is planned and has multiple earth points. There are rules, for instance I think it is every third or fourth pole must be earthed. On tncs we are channeling the fault currents through the network, seems like a good idea to me that we know that the network can take it and not just hope
what tents .many still happilly standing
He he he, I had an SSE engineer round to look at a possible dodgy TN-S supply and asked if it could be changed to TN-C-S. Said it could, but 'you'd need to wait 5 weeks, why not do it yourself?', 'Que???'. He then went onto demonstrating connecting EC into neutral of service head
Only the network planner can tell you whether pme is available. It is so easy to make an earthing enquiry it is stupid to not do it right
I was told by a Part P assessor that a couple of reasons for the DNO not providing a PME earth was 1) Because of the risk of lightning strikes in some areas and 2) neutral currentsIsnt all neutals connected to earth at the very begining anyway?
It's connected to a PEN conductor - not any old neutral!Why is it that a in one house a tncs system here can be connected to neutral but in another house it cant?
Would still work though in the sense rhat if you were to touch a live conductor it would tripIf RCDs are used, and you create the link from the neutral bar(s) to earth (as in your OP), the RCD then will not see any fault current and will fail to operate, because any earth fault is directed back down neutral before it passes through the RCD.
RCDs don't detect fault current, they detect imbalances between Line and Neutral.If RCDs are used, and you create the link from the neutral bar(s) to earth (as in your OP), the RCD then will not see any fault current and will fail to operate, because any earth fault is directed back down neutral before it passes through the RCD.
RCDs don't detect fault current, they detect imbalances between Line and Neutral.
The Neutral Earth link is placed up stream from any RCD, which prevents any earth Fault Current from bypassing the RCD via the Neutral.
Say what?Would still work though in the sense rhat if you were to touch a live conductor it would trip
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