charles wrote:
In article , Doctor Drivel
wrote:

[Snip]

I have!!!! Mandatory and advisory are not the same thing.

....... 314.1 Every installation shall be divided into circuits, as
necessary, to: (i) avoid hazards and minimize inconvenience in the
event of a fault ...

That, I believe, to be the key point. If there is only one RCD
hazards will be created.

I think two RCDs is better than one. DP RCBOs on all circuits is by far the
best. But the point is the regs do not state two RCDs are needed or a CU
split into two: one part with an RCD and one part unprotected. NOTHING
there states that. Look at words like shall, should , would, ect. You
think they all mean shall.

Legrand single RCD CU for sale:
http://www.screwfix.com/p/6-module-c...s-switch/60136

Note: not split.