We once (edit: still do) had round-pin 15 amp plugs that were even larger. But then at the same time we had smaller 5 amp plugs with 3 pins and even 2 amp plug

We once (edit: still do) had round-pin 15 amp plugs that were even larger. But then at the same time we had smaller 5 amp plugs with 3 pins and even 2 amp plugs with 2 pins. Then there were the Bakelite Y adaptors you could pop into lamp sockets in the ceiling to power a radio or similar low current device - they were used in houses that only had light circuits, no ring main. Those houses would have started with DC circuits, and would have had gutta-percha insulation on solid copper in the ceiling voids. So that many decades ago, you could have 3 different plug standards in one house AND still see the jets and taps for gas lamps! My point being: we might get away with a smaller plug, but the transition would take a few decades. The full story is below. I'd forgotten about the 30A 3-phase plugs... https://en.wikipedia.org/wiki/AC_power_plugs_and_sockets:_British_and_related_types https://en.wikipedia.org/wiki/AC_power_plugs_and_sockets:_Br...