On 4 Jan,
John Rumm wrote:

[1] In addition to the specific requirements for "additional protection"
in special locations etc, there is also a general requirement for the
protection for buried cables. This basically means if you can't see the
cable (i.e. not surface wired) then it needs to be "protected" in some
way. This can be by encapsulation in a suitably earthed shield (so
cables like earthshield, MICC, SWA cable, or ordinary cable in metal
conduit etc are ok), or by being buried = 50mm from the surface, or by
protection with a RCD with a trip of = 30mA. Hence for most
circumstances it is simpler to provide RCD protection for all circuit
(using several RCDs!) rather than jump through the other hoops unless
there is specific reason to do so.

Pedantic point, when does cable cease to be visible? If it is enclosed in
surface run trunking or conduit I'd say it was still visible and didn't need
additional protection. Is this how the 17th edition would view it?




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