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On Thursday, 7 December 2017 13:35:22 UTC, John Rumm wrote:
On 07/12/2017 11:20, SL wrote:

ISTM that a person who does not know that neutral and earth MUST be
connected together in at least one place is a person who is not
qualified to do such work and the resulting installation is at risk
of being in breach of the Building Regulations. See

Erroneous statement followed by a non sequitur... Mmmm useful ;-)

The OP reported that connectivity had, to his surprise, been found
between his neutral and earth wires. It is a requirement that the
local neutral wires must, somehow, be electrically connected to
the terrestrial Earth, and it is a requirement that the local earth
wires must, somehow, be electrically connected to the terrestrial
Earth. Therefore the reported connectivity is required to exist,
and so should be expected; it occurs due to at least one
connection, somewhere; such a connection may be man-
made metallic or by way of the terrestrial Earth (or by
any other reliable means, if any is possible).

Yes, but when breaking into a ring to add something, he doesnt need
to know about the required connection between earth and neutral to
do that safely. In spades when it happens back in the sub station.