Type B Fuse keeps popping

[PrenticeBoyofDerry]

Looks like the connector at the end of the two line conductors is not that great either.
The cable needs as others have said cutting back and rejointing and protecting from mechanical damage.

 

[DaveHerns]

Definitely beyond repair with heat shrink . If the wall is only plastered on the other side can you not knock the screw back through the wall and repair the plaster?

 

[Echo the husky]

Sometimes these things happen, it's unfortunate but the cable was probably hit when the screw went in, and over time it's worked its vibrated/expanded/contracted to the point where it occasionally makes contact with the live and earth at the same time, and when it does it goes bang

Emma Shaw springs to mind. And the OP was going to ignore the fault...

 

[ban-all-sheds]

Definitely beyond repair with heat shrink .

JohnD assures us otherwise, and advises the OP accordingly.

How can he possibly be doing that with any morality or care behind it unless he knows?

 

[Iggifer]

Sometimes these things happen, it's unfortunate but the cable was probably hit when the screw went in, and over time it's worked its vibrated/expanded/contracted to the point where it occasionally makes contact with the live and earth at the same time, and when it does it goes bang

Emma Shaw springs to mind. And the OP was going to ignore the fault...

Yup. Went to a similar fault today, but luckily it was a) N-E and b) only a 3.5 socket screw and a poorly thoughtout cable entry.

Seems it had been like that since the 80s but once he'd had RCBOs fitted, no dice.

N-E fault on a whole house ring main could have been a right pain in the proverbial! As could this one if it wasn't for the 'crackling'