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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.
You Don't Need an Alarm to Protect Your Circuit! Many circuits can benefit from protection against accidental reverse polarity.While most can be protected by polarized connectors to the power source, many hobbyist circuits and kits can be powered by jumper wires, thus eliminating this simple type of polarity protection.