In addition to the effects of a direct lightning strike, the induction effect of indirect lightning can also cause overvoltage peaks several hundred metres away from the point of impact. The induction can also have an impact in the vicinity of the down conductors of a lightning protection system. Under certain circumstances, these inductive overvoltage peaks can cause overvoltages on cable trays and on electronic devices within a technical infrastructure room, which can lead to functions being disrupted or devices failing completely.