On 31/05/2019 08:52, PeterC wrote:
On Thu, 30 May 2019 18:22:17 +0100, John Rumm wrote:

Just to clarify: if the cable(s) are protected by a 30mA, 30ms RCD or RCBO
do they have to be a) protected

The RCD protection alone is adequate. Its only when RCD protection is
not available, that other remedies may become required.

b)as far in a 50mm?

For a non RCD cable, then its needs:

Surface wired (bare or in trunking), or
To be buried = 50mm from the surface, or
Mechanically protected by earthed metal - be it capping, conduit, armour
etc, or
A deviation from the regs based on the specific circumstances.

It seems that surface-mounted mini-trunking would be OK; what if that were
flush with or just below the surface?

If its visible and obviously a cable, then its fine.

Next door had the same problem. He used just steel capping and RCD so that

If you have the RCD, then no additional protection is required -
although for cables that are being installed before plastering, capping
is normally a good idea to protect them from damage during plastering.

it's all covered by just the plaster. As in my house, some runs are not in
Safe Zones - but do go to sockets or switches and are all vertical or
horizontal. Should be easy to detect - a decent magnet would do it!

Cables tend to not be magnetic unless armoured.

The requirements these days specify RCD protection for all sockets -
regardless of how the cables are run.


--
Cheers,

John.

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