Distribution properties of lightning surge current induced from earth electrodes in household wiring

In the modern information society, lightning surges represent a serious risk to home electronics and telecommunication equipment. In this study, the distribution properties of a lightning surge current from the earth through indoor wiring were investigated by using model circuits of common home electronics. The distribution properties of the surge current were significantly affected by the conditions of the grounding systems, protection devices, and the circuits of home electronics. To protect the electrical circuits from the lightning surge, it is necessary to adopt a common grounding system and to introduce appropriate protection devices.