Earthing Standards

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Applicable Standards

  • BS 7430 Code of practice for protective earthing of electrical installations
  • BS 7671 Requirements for Electrical Installations
  • BS EN 50122-1 Railway applications – Fixed installations – Electrical safety, earthing and the return circuit – Part 1: Protective provisions against electric shock
  • BS EN 50122-2 Railway applications – Fixed installations – Electrical safety, earthing and the return circuit – Part 2: Provisions against the effects of stray currents caused by d.c. traction systems
  • BS EN 50122-3 Railway applications – Fixed installations – Electrical safety, earthing and the return circuit – Part 3: Mutual Interaction of a.c. and d.c. traction systems
  • BS EN 50522 Earthing of power installations exceeding 1 kV a.c.
  • DNO specific engineering specifications
  • ENA TS 41-24 Guidelines for the design, installation, testing and maintenance of main earthing systems in substations
  • EREC S34 A guide for assessing the rise of earth potential at electrical installations
  • EREC S36-1 Identification and Recording of ‘Hot Sites’ – Joint Electricity Industry / British Telecom Procedure
  • NG TGN(E)187 Guidance for Conductor Jointing in Substations
  • NG TS 3.01.02 Technical Specification – Earthing

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