The destructive power of thundering is extremely large. It is not enough to rely on external thundering protection ( thundering rod). Thundering waves will indirectly or indirectly (through electromagnetic induction) invade electrical passages and metal passages (such as power cables, signal cables, antenna feeders and metal pipes). The resulting thundering overvoltage and surge voltage will cause great harm to electrical equipment, and information network systems. If the cables is damaged, the equipment will be damaged and the system will be paralyzed, resulting in an incalculable loss.
