Why do we need to know this?

Electrical power is generated in large quantities at central locations. It is similar to the water supply. Water generally comes from a large river and must be distributed in small quantities to homes for use. Electricity is generated at high voltages and is distributed to substations to be reduced in voltage for use in homes, schools, and businesses. Because electricity can be harmful if not treated appropriately, the process of distribution involves different levels of protection. Part of the protection in your house is a circuit breaker box. Circuit breakers help prevent electrical fires in your home. Understanding how electricity is distributed to your house can help protect your home, protect you from injury, and also save you money.