Part of this?

http://electrical.theiet.org/wiring-...t.cfm?type=pdf

The detailed papers presented at the meeting also used to be available.
But the link in the footnote to the Wiki page
http://wiki.diyfaq.org.uk/index.php?title=Ring_circuit no longer takes
one to that paper and I cannot now find them (or the minutes of the
meeting) on the IET site or elsewhere. Can you or others work some
magic to make them appear again pl?
--
Robin
reply to address is (meant to be) valid