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lightning arrester (LA)

As can be seen from the word lightning conductor (LA), this is a device with which lightning is diverted to the earth potential. Corresponding systems are referred to as lightning protection systems

. A lightning rod is an electrically conductive wire, one end of which is attached to the ridge of the building roof or to the chimney and the other end of which is connected to the surface or earth electrode. A surface earth electrode can be a ring earth electrode or a mesh earth electrode, which are buried about one metre

below the surface of the ground. Incontrast, depth earth electrodes are driven up to 15 m into the ground and guarantee a constant

earth resistance.

Lightning conductor at the ridge and at the skylight with down conductor, photo: gnogongo.de

Lightning conductor at the ridge and at the skylight with down conductor, photo: gnogongo.de

The lightning that strikes is conducted to the earth point via the lightning conductor on the outside of the building. Since lightning causes extremely high currents, the lightning conductor should have as large a diameter as possible and be made of copper

. Conductive gutters and downpipes can also be included in the lightning conductor. To increase lightning protection, several interconnected lightning conductors can also be installed on the building roof.

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Englisch: lightning arrester - LA
Updated at: 07.09.2012
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Translations: DE