... disyurbances and damage.lightning peoduces spikes/surges,over-voltage or power cuts,What canses it?the surgeis gengrated bu either ... a directhit,or indirectly striking underground or overected equiupment in nearby buildings.Power-cuts:common in every country ... in operation,What causes it?power or sub station failure,breakdown in the distrrbution nerwork,or simply a pulg being pulled ...