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
External influences (IEC 60364-5-51)
- Definition and reference standards
- Classification
- List of external influences
- Protection provided for enclosed equipment: codes IP and IK
