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## 8.9.7 Lightning and Overvoltage Protection 

## 8.9.7.1 External Lightning Protection 

An external lightning protection system of buildings shall be established to prevent damage to the building due to fire or mechanical destruction in the event of a lightning strike. 

All devices to be installed outside the building for intercepting and discharging the lightning current to earth are described in DIN VDE 0185. 

The lightning protection system to be adopted shall be performed according to the protection class I requirement of IEC 62305-1 , Protection of structures against lightning. 

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All the buildings, of which people work inside, shall be protected via Faraday Cage against the lightning. Other units except buildings shall be protected by active interception rods. Protection shall be included all Plant. 

The earthing system for external lightning protection shall be connected to the building reinforcement. 

## 8.9.7.2 Internal Lightning Protection 

The heart of the internal lightning protection system is the equipotential bonding system to be established. All from field incoming and outgoing to field signal and control lines shall indirectly be incorporated in lightning protection equipotential bonding system via lightning and overvoltage arresters. 

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