Is it a good idea in a new ringmain to try not to cut the wires,
but just cut the sleeves back and fold the coppers back on themselves?
If so then what to do with the double sockets which have two terminals for the earth wires?
I have done it a few times on completely new ring circuit installs.
The first time was 20 years ago in a computer room for lots of PC-type
computers stacked on rows of shelves (not rackmounts) where the walls
were lined with MK sockets on MK Premier trunking. I didn't want
contact resistance adding up with number of sockets, so I carefully
stripped and folded back double about an inch of conductor at each
connection. 5 ring ciruits IIRC. These were all stranded singles.
A few years later when I rewired my parents kitchen with two ring
circuits, I did the same there, but using T&E. It's a bit more
fiddly and you need to feed a loop of T&E in through a single
backbox punchout to get the sleeve over the folded CPC. It was a
bit of a game I set myself, but I wouldn't go anal about it in a
domestic situation - there aren't likely to be enough sockets for
it to seriously matter.
Did same in my own kitchen rebuild a year or so later.
This all predated sockets with two earth connections.
[email address is not usable -- followup in the newsgroup]
In an ideal world one could argue its "better", and the kind of area
where a DIY installer can afford to lavish the extra time on it. I am
aware of some who have done it, but I don't think its very common practice.
Generally (some dodgy Chinese USB / Gadget sockets excluded ) you
only need make connection to one or the other as they should be
electrically joined in the socket. The exception to that would be when
using "high integrity earthing" on circuits that are anticipated to have
a high earth leakage current when in normal operation.
 ISTR bigclive had a video of a double socket with additional USB
where each half had its own earth terminal.
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