1 Feb
2011
1 Feb
'11
9:32 p.m.
On 01/02/2011 11:22, Christian Corti wrote:
On Mon, 31 Jan 2011, Tony Duell wrote:
Both TN-C and TN-C-S are allowed here, but those terms refer
specifically only to building wiring, and where the neutral is connected
to earth (as it always is, somewhere). But Tony was writing about
appliance wiring, and he's right about that; the protective conductor is
not permitted to carry any load current under normal conditions, whether
it's a fixed appliance or portable.
--
Pete Peter Turnbull
Network Manager
University of York
Taht wouldn't work in Europe (since the 2
sides of the 230V mains are not
balanced about ground), and anyway AFAIK making the protecive ground wire
carry any current under normal conditions is totally forbidden.
In new installations, maybe. But many older houses have just that, they
use the neutral wire as protective ground (called "klassische Nullung"
or TN-C system as opposed to a TN-C-S system, see
http://en.wikipedia.org/wiki/Earthing_system)