Paul,
I have seen these fittings in a couple(3)
of houses in NZ here.
I recently re-wired a house, that had
the 3" square plates and the power sockets
were wired in a ring circuit, with?
MK Electric double switched socket-outlets.
I do remember the plasterer swearing about
them, as a standard flushbox hole over here,
normally measures 2"x4"max.
But, Paul, one thing that I find unusual,
was the use of the ceiling-looped(junction
box), style of wiring, we standardly use the switch-loop method,over here, because of
the need to have an Earth conductor at
each light fitting and switch.
However, the older ceiling-loop method,
is still around here, it's a pain.
