I think these assumptions are roughly well published, at least historically, and "tweaks" from there are seen as "improvements", such as additional protection by RCD.
I do have a minor concern that for new installations there's definitely no such thing as an equipotential zone any more when you move outside steel-framed / steel-clad buildings, but if that's the case there are only other exposed-conductive-parts to touch anyway, and they are all connected to MET.
Outdoors, it remains as it always was in that respect, save for RCDs for socket-outlets and portable equipment.
I think these assumptions are roughly well published, at least historically, and "tweaks" from there are seen as "improvements", such as additional protection by RCD.
I do have a minor concern that for new installations there's definitely no such thing as an equipotential zone any more when you move outside steel-framed / steel-clad buildings, but if that's the case there are only other exposed-conductive-parts to touch anyway, and they are all connected to MET.
Outdoors, it remains as it always was in that respect, save for RCDs for socket-outlets and portable equipment.
