LV Distribution
From Electrical Installation Guide
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
