On 14/02/2020 15:44, newshound wrote:
On 14/02/2020 11:10, Tim Watts wrote:
On 14/02/2020 11:06, Tim Watts wrote:
On 13/02/2020 22:35, TimW wrote:

Earth rod and required RCD measures if you are a TT installation.


But are you maybe a TN-C-S or TN-S (supplier provided earth) and this
clamp was merely equipotential bonding?


Going to add - if you can't work it out, best call a local sparky
around asap to check it out. The worst case scenario as others have
mentioned is a very dangerous installation.


Although *if* it is a reasonably recent installation, the supplier's
main fuse or switch may bear the magic letters "PME".

That said, mine did when I moved in, but the earth was not in fact
connected to the neutral, but to a fairly feeble looking earth rod right
by the front door.

Indeed the sticker alone is not solid evidence that the install is
actually using the PME earth.

My cutout has the PME sticker, but it would seem that the upgrade to a
PME capable supply occurred after the house was previously re-wired.

Hence the installation is TT (as would be typical for many rural
properties with overhead supplies).




--
Cheers,

John.

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