On 20/07/2019 13:07, Dave Plowman (News) wrote:
In article ,
Brian Gaff wrote:
I've seen this as well, but always I find that several months after
installation you need to retighten the screws due to it all relaxing.
If you strip enough and fold it nicely it then grips quite well. I'm
surprised technology has not improved on a screw by now, maybe to a
screw pushing a spring plate system as you can find in some terminal
blocks.

Given the life of most electrical installations, I'd not trust a spring to
retain its effectiveness for long enough.


Would you trust a 'maintenance free' connector, like Wago ?.

Somehow I suspect that the plastic that these are made of will become
brittle with age and silently release its grip, decades down the line.

Nothing wrong with a screw terminal connection if you have some common
sense.