On 20/01/2020 15:14, Dave Plowman (News) wrote:
In article ,
John Rumm wrote:
But do you have problems with the screw connections in your CU? Riser?
Meter?

I have met a number of Wylex style rewireable fuse CUs where the
terminals were no longer "tight" - even if there were no obvious signs
of overheating as such.

But were they ones you installed yourself so know they were tight to start
with?

Not usually... but then again they have often been loose enough it would
be hard to believe that they were originally left like that (and also
where the wire ends show deformation from the original clamping pressure)

I have installed CUs and then a year later checked tightness on all the
termination screws. Even when properly tightened originally, applying
similar torque again will sometimes get a bit of movement.

As I said, I've come across plenty faults due to terminals not being
tightened properly.

Yup also a typical failure mode, but some relaxation and creep of
terminations also seems common.

--
Cheers,

John.

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