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Lightning protection systems. Lightning can easily damage a number of different building materials, and the large electrical currents can cause fires within the interior or even side flashes. Side flashes are small explosions of highly pressurized, super-heated air that occur inside the nooks and crannies of structure materials.
How to Protect Your House and Its Contents from Lightning. IEEE Guide for Surge Protection of Equipment 7. wires and ground to less than ~1000 V. Sheaths of coaxial cables from. satellite antennas must also be bonded to the building ground (NEC Art.