GeoGraph - photograph every grid square

The former Western Road Secondary Modern School, Crookes

The spiked finial at the top of the bell tower is a lightning rod, which is especially made of copper. Basically, this is attached to a strap like bare copper conductor, which is in turn attached to the earth electrode below. The earth electrode is usually a large metal plate buried underground. The purpose of all this is to direct the current from a lightning strike and discharge it safely into the ground, so protecting the structure. It is necessary to make sure that the conductor is kept well away from other metalwork, electric cabling, gas and other inflammable materials.