Electricity Transmission System
After electricity is produced at power plants it has to get to the customers. Our cities, towns, states and the entire country are criss-crossed with power lines that "carry" electricity.
The first sets of power lines leaving the power plants are large, high voltage transmission lines. The long thick cables of transmission lines are made of copper or aluminum because they have a low resistance. High voltage transmission lines carry electricity long distances to a substation. The power lines go into substations near businesses, factories and homes. From here, transformers change the very high voltage electricity back into lower voltage electricity.
From these substations, electricity in different power levels is used to run your homes and businesses. In your neighborhood, another small transformer mounted on a pole or in a utility box converts the power to even lower levels to be used in your house.
From the power plant to your television or toaster, all of this happens at the speed of light. Meaning, the instant the electricity is generated you are using it. Even if the power plant is hundreds of miles away.