When you flip a light switch, cozy up next to a space heater or turn on your electric stove to prepare dinner, electricity flows instantly. But behind that simple action is a modern engineering marvel, the power grid, which consists of millions of miles of power lines.

The power grid is a vast network that generates, moves and manages electricity so it’s available whenever you need it. While most of us don’t think about it day to day, understanding a few basics can help you ap… >>