This British Standard primarily provides recommendations and guidance on meeting the requirements for the earthing of electrical installations, including:
a) protective earthing of low voltage installations to BS 7671-2008+A1;
b) the interface between LV and HV substations of 11 000/400 V to BS EN IEC 61936-1-2011 within buildings; and
c) protective earthing and changeover switch arrangements for generators supplying low voltage installations.
The earthing of a system or installation is generally provided for reasons of safety.
This British Standard applies only to land-based installations in and around buildings. It does not apply to:
1) ships, aircraft or offshore installations;
2) earthing of medical equipment [see BS EN 60601 (all parts)];
3) special problems encountered with solid state electronic components;
4) equipment sensitive to static electricity;
5) requirements for functional earthing;
6) earthing of overhead lines between electrical installations; or
7) the internal earthing of equipment.
BS 7430:2011 Referenced Document
BS 1377-3 Methods of test for soils for civil engineering purposes - Classification tests
BS 1400 Specification for Copper alloy ingots and copper alloy and high conductivity copper castings
BS 2754 Construction of electrical equipment for protection against electric shock
BS 3288-1 Insulator and conductor fittings for overhead power lines. Performance and general requirements*， 2014-12-31 Update
BS 7375 Distribution of electricity on construction and demolition sites - Code of practice
BS 951 Electrical earthing - Clamps for earthing and bonding - Specification
BS 7430:2011 history
2011BS 7430:2011+A1:2015 Code of practice for protective earthing of electrical installations
2011BS 7430:2011 Code of practice for protective earthing of electrical installations