On Mon, 30 Jul 2018 17:50:47 +0100, John Rumm wrote:

As for RCD on lighting circuits: great - get a shock from a mains tool,
lights go off, fall off stepladder!

This is why even on basic installations to share out circuits between
more than one RCD such that you don't kill lighting in the same area as
the sockets etc.

Mine has 30mA for the sockets etc. and 100mA for lighting and a few other
things.
The shed is fed from the 100mA RCD, then 30Ma for the sockets and only a 6A
MCB for the lights.

Separate RCDs/RCBOs would be OK, so long
as the whole board doesn't go off.

"whole house" RCDs went out with the 16th edition.

Mine's about 1990, so 16th., I assume.
No unprotected sockets: there goes the freezer!

Dedicated RCBO.

Yes, I like the principle of RCBOs but that would need some rewiring and the
board probably wouldn't take them.
--
Peter.
The gods will stay away
whilst religions hold sway