On 07/06/2019 15:32, dennis@home wrote:
On 07/06/2019 13:01, John Rumm wrote:
On 06/06/2019 20:47, dennis@home wrote:
On 06/06/2019 18:46, John Rumm wrote:
On 06/06/2019 12:48, Andy Burns wrote:
David wrote:

The box has 3 * 2 wire 773 connectors which are yellow plastic.
773 should be good for up to 2.5 mm and 24A so presumably are
suitable?
Can someone please confirm?

As the 773-102 is only rated to 24A, but the ring will likely have
a 32A MCB, really you should use a 222-412 wago connector instead.

The "as installed" required rating for a cable on a 32A ring is only
21A, so in general 24A should be ok, unless you are aware of
specific reasons why it should not be (say the joint was at one end
of an asymmetric ring)


What is an asymmetric ring?

One with most of the sockets distributed near one end of it... Say
where someone has installed a long run of sockets starting close to
the CU, and then just returned the last leg from the far end, rather
than distributing the load on the way out and the way back IYSWIM.

Only the installer will know where the cables go so any ring could
have an asymmetric load put on it by a householder. It just depends
on what he plugs in.

Well we are talking about someone modifying the wiring, not just
normal use. So hopefully the installer will have some clue. If they
were unsure, then upping the terminal capacity to the higher load
version would be a sensible mitigation.





It doesn't really work though.
You have to assume they will not plug high power loads into sockets that
may be at one end but there is nothing to tell them that they are at one
end.

I think we have done this discussion before.



--
Cheers,

John.

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