Trumpy those cord-line switches in your picture are terrible. They fail the moment you insert a 100w light bulb in the table lamp instead of a 60w. I've never checked but I cant believe they are rated at 10A.

There is a also a picture of a 240V 15A socklet and a 10A.

Perhaps someone can help me out here by telling me why the only difference between our 15A and 10A socket outlets here is a larger earth socket. And ditto for plugs.

I would have thought that the normal current carrying pins & sockets ( p & n ) would have have been larger too.

If the only reason for the larger earths is to prevent plugging a 15A plug into a 10A socket, then why didn't we just up-rate our 10A sockets to 15A ?

After all, the minimum size of cable allowed to feed a 10A outlet is 1.5mm which is rated at 16A. This is still a requirement isn't it ? ?