TNC earthing system
TNC earthing system
(OP)
The TNC system is rare in the UK. It is a system where the source star point is earthed through an impedance and the function of neutral and earth is combined througout the system.
I would like to find out more about the use of this system, advantages and disadvantages etc. Could anyone advise from where such info might be sought?
I would like to find out more about the use of this system, advantages and disadvantages etc. Could anyone advise from where such info might be sought?
Regards,
Lyledunn






RE: TNC earthing system
You might look over/post here… “pauluk” is the moderator there.
http://electrical-contractor.net/cgi-bin/forumdisplay.cgi?action=topics&number=9
http://electrical-contractor.net/ubb/Forum9/HTML/000001.html
http://electrical-contractor.net/ubb/Forum15/HTML/000044.html
PaulCoxwell@aol.com PaulCoxwell@aol.com
RE: TNC earthing system
Interesting site but I am afraid no mention of the system I was looking for. I have a feeling that this system may have a use say in production lines etc where security of supply is paramount. It may be used with earth monitoring devices.
I am really looking for someone who has used the system. As it is a rarity in the UK,I have no direct experience.
Regards,
Lyledunn
RE: TNC earthing system
RE: TNC earthing system
http://www.efinet.com/images/pdfs/wi_sgap.pdf
http://www.efinet.com/images/pdfs/wi_din.pdf
etc. for more info.
RE: TNC earthing system
RE: TNC earthing system
Yes, I do mean TNC, Re; Geofrey Stokes commentary on the IEE wiring regulations. However, you may be right, I really have no experience of this system. I am assuming that because phase will in effect be connected to exposed conductive parts through the winding or element of the piece of equipment concerned then it would be sensible to have some kind of limiting impedance at the connection with earth at source.
Many thanks busbar, I need to get this out of my hair first. (whats left of it!!)
Regards,
Lyledunn