Moreover, the type F plug easily fits into a type O socket, but without ground and contact insulation. It is a big risk if they import appliances with type F pl

Moreover, the type F plug easily fits into a type O socket, but without ground and contact insulation. It is a big risk if they import appliances with type F plugs, or if, for example, European tourists visit Thailand bringing their own electrical devices. I wonder why Thailand didn't just adopt type F like the neighboring countries.