"Tough Guy no. 1265" wrote in message
news
On Wed, 25 Feb 2015 18:37:32 -0000, Tim Watts
wrote:

On 25/02/15 17:54, Tough Guy no. 1265 wrote:

I haven't seen concentric cable for forty years.
It WAS a dead loss.

My house is supplied with it, including the cable they recently
replaced.


So's mine - 2 core (live centre and neutral outer) on a TN-C-S system.

There is a 3 conductor version for TN-S systems too.

My earth is connected to the neutral at the meter. They are one and the
same. No doubt the substation has an earth spike. I don't think I do,
apart from the odd little wire to a pipe.

That's the earth.