Mounting cables in domestic homes in europe is works as such, that you have often -NYM cables. That is usually three wires wrapped in a double mantle. Nicely protected to be used inside or outside. Often carried along Walls/Bars or in dry walls or in cable holders. Actually a quite feasable and practical cable type. Using sockets with spring connection - just push the uninsolated ends in.
Why would the US not use this type but instead have a more dangerous type? I am talking about typically yellow mantles with 3 wires. The wires have slightly less diameter, the earth is not insulated and the outer wrapping is thinner. Is it worth the money?
You know: less voltage -> higher current -> higher risk of fire.
But then those Wires are piped through a metal hose (preventing fire, I guess). Don't tell me this is cheaper than taking better diameter and insulation in the first place