Protection against electric shocks and electrical fires

From Electrical Installation Guide
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Earthing schemes

Earthing connections
Definition of standardised earthing schemes
Characteristics of TT, TN and IT systems
Selection criteria for the TT, TN and IT systems
Choice of earthing method - implementation
Installation and measurements of earth electrodes

The installation system 

Distribution switchboards 
Cables and busways

External influences (IEC 60364-5-51)

Definition and reference standards 
Classification
List of external influences
Protection provided for enclosed equipment: codes IP and IK

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