4 Key Differences Between Power Strips and Extension Cords
Power strips have multiple outlets and a built-in circuit breaker; extension cords are just a length of wire with a single outlet on the end.
Power strips protect against overloads by tripping when current exceeds their limit; extension cords have no such protection and can melt or catch fire.
Use a power strip when you need more outlets in one spot; use an extension cord only when you need to reach a faraway outlet.
Never plug a power strip into another power strip or an extension cord into a power strip—this creates a serious fire hazard.