In article ,
John Rumm writes:

http://wiki.diyfaq.org.uk/index.php?...Cable_crimping

Comments here on on the wiki discussion page as you prefer.

Looks good. A few minor points/thoughts...

I would put a picture of the right tool somewhere near
the beginning or the article, not just the wrong tool,
and perhaps a pile of different size crimps.
(You could add pliers, mole wrench, and hammers to the
picture of wrong tools.)

"[screwed terminal] method is only acceptable where the joint
will remain accessible for future inspection and maintenance,
since screwed terminal connections can become loose over time."
Please provide a citation for such a justification.
(I don't believe that accurately describes the reason, and
Wiki's need to be accurate when giving facts like this, or
make it clear this is speculation of the author.)

In the sample damage you've shown, I would probably not have
cut and rejoined an undamaged conductor.

A blue crimp is the wrong size for the earth conductor. You
could use one if you folded the conductor double, or the
crimp has no central barrier such that you can push the
conductors through to overlap and crimp both conductors
together. Whilst in practice a blue crimp probably would
work OK as you have done, an article explaining how to
crimp probably should get this right.

It's probably worth explaining crimp sizes and colour
codes. Otherwise someone unfamiliar with them could well
think they need a red one on the live, a blue one on the
neutral and a yellow one on the earth ;-0

This is getting to the really minor nit level, but when I
join T&E, I usually stagger the joins even more than you did,
such that none of the crimps overlap at all. Then the cable
thickness doesn't increase as much at the join, and it can
if necessary be pulled through any holes with the cable intact.
This is something which might happen many years later without
gaining access the repair site (or even knowing about it).

This, like pipesoldering demos, is the bench demo. In real
life (TM) you'll be doing it in some corner where you can't
both feel and see what you're at the same time, you can't
swing the crimp tool into the right position and get any grip
on the handles, and there's only 2mm of conductor exposed
from a 3' thick bomb shelter wall ;-)

--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]