I am in the process of replacing some old plastic 13A sockets (which didn't require earthing) with new metal ones (which require earthing). Unfortunately, the earthing wire has been cut short by the previous owner and there is only a short stub of single core earthing wire coming out of the insulation. I need to use a small plastic connector block to extend the earthing wire, but I am unsure what amp rating of connector block I should use.
As the earthing wire only carries a short burst of current when there is a fault before the breaker trips, can I use a 5A connector block on the earthing wire or do I need to use a 15A one?
Also, is 1.5mm^2 single core earthing wire suitable for this purpose or does it need to be thicker?
Any replies would be greatly appreciated. :)