The reason it's a "bad idea" is that most surge protectors are power strips and you must be cautious when you daisy chain power strips. Likewise extension cords

The reason it's a "bad idea" is that most surge protectors are power strips and you must be cautious when you daisy chain power strips. Likewise extension cords. Why? Two reasons: You have to ensure the wire gauge on every link can handle the current, and at every junction (plug) the resistance is higher than in the wire itself. When electrical fires start they usually start at these plug junctions because they overheat. The surge protectors themselves don't mind being daisy chained.