Lightning and fluctuations in utility power (caused by grid switching, for example) are often assumed to be the main sources of power disturbances. However, the overwhelming cause is actually equipment, such as motors and appliances, turning on and off. Even simply switching lights on and off will cause electrical surges. In fact, it is estimated that 65% of all transient voltage surges are generated from inside sources, while only 35% come from outside.
Stock Code: ELEC-AG6503C3