A lightning strike near a structure or overhead supply lines can cause a surge voltage on the cable lines and can transmit a momentary high voltage impulse. This surge even if it lasts for microseconds can destroy many electronic components. In LEC, there is a full range of surge protection devices (SPD) that you can install to protect electrical devices from voltage spikes. These SPDs either block or channel the excessive voltage to the ground. For all types of Surge protection devices Visit: http://www.lightningprotection.com/