> For urban systems, the European system can take advantage of the flexible secondary; for example, transformers can be sited more conveniently. For rural system

> For urban systems, the European system can take advantage of the flexible secondary; for example, transformers can be sited more conveniently. For rural systems and areas where load is spread out, the North American primary system is more flexible. I’ve often wondered how many of the differences between Europe and The United States are the result of population density.