Extension cords offer a convenient solution for delivering power right where it’s needed. But proper selection and use of extension cords is critical to avoiding injuries. An estimated 3,300 residential fires originate in extension cords each year, killing and injuring more than 300 people. In addition, nearly 4,000 people are treated in hospital emergency rooms each year for non-fire related extension cord injuries, including fractures, lacerations, and electrical burns. Prevent potentially dangerous extension cord mistakes by following a few simple guidelines.