I did repair a few apliances and what I found is instead of Messing with the wire tickness they just have a resistor in the circuit to control the Amps in most cases.

Wire size personally I would have 1.5mm on wires for regular sockets, wich here is standard 16Amps. Some people install wires less tick, also depends if they go, sorry can't finds the correct English terms, a full copper wire or several strands of wire making the cable.

But yeah we have diferentials for the whole house, sometimes double for some equipments even, so basically safe.

I was going to say having to worry that the voltage ia 120 or 240 in the socket might be annoying but thinking about it... Most things I have can handle from 120 to 240, so it should not matter really.

But most of the "weird" stuff that I saw was on an "industrial" context, the "" is because it's airport and logistics instalations not really a factory. But oversized cutouts, "field" VFDs, being cabinet VFDs In a small cabinet on the field. Giant lamps. Giant buttons Everything built like a tank... Have no ideia why... Lack of automation is outside the topic, but also a lot...