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DIN norm
IEC Norm

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0 Foreword
1 Lightning discharges
2 General acknowledged rules of technology for installing lightning protection systems on structures
3 Necessity of installing lightning protection systems
4 Components of a lightning protection system
5 Planning support
6 External lightning protection system
7 Internal lightning protection system
8 Lightning protection systems for special structures
9 Protection of electrical and electronic systems against LEMP
10
- 10.1 SPDs in low-voltage installations
- 10.2 SPDs in photovoltaic installations
- 10.3 SPDs in telecommunications and signal-processing networks
  - 10.3.1 Installation location and arrester categories
  - 10.3.2 Surge immunity of the terminal devices
  - 10.3.3 Earthing of the system to be protected
  - 10.3.4 Electrical parameters of the system to be protected
  - 10.3.5 Mechanical parameters of the system to be protected
  - 10.3.6 Earthing and equipotential bonding of SPDs
  - 10.3.7 Special considerations for use in intrinsically safe measuring circuits
11 Protection concepts

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10.3.3 Earthing of the system to be protected

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