Content Description


1. introduction has been rewritten to reflect the status when this document is produced;

2. the scope has been improved to clarify the application of this document;

3. missing and obsolete terms and definitions have been updated including improvement of existing terms;

4. Table 1 has been updated where agreements between supplier and user are needed;

5. requirements of electromagnetic compatibility have been clarified;

6. insulation coordination clause (Clause 5) has improved wording for better clarity and the technical content has an updated coordination to the latest versions of the insulation coordination standards;

7. wording regarding electrical equipment has been improved and made clearer;

8. subclause for fuses has been improved and reworded;

9. requirements have been added for labelling when multiple sources are required to be disconnected;

10. missing requirements for GIS have been reintroduced;

11. subclause regarding ventilation (HVAC) has been improved;

12. figures in Clause 7 have been updated and moved to the corresponding subclause;

13. requirements for transformer installations have been improved including adjustment of editorial typing-errors;

14. clause on protection, automation and auxiliary systems has been restructured and improved;

15. protection against lightning strokes has been extended;

16. clarification of content due to the distinction between erection (and providing electrical safety for the intended use of the electrical power installation) and subsequent activities such as maintenance and repair with safe working procedures;

17. where no provincial, national or regional regulations are available for safe working procedures, an informative guideline is provided in Annex F. This replaces the former parts of Figure 3 in Clause 7.


About IEC

The IEC is a global, not-for-profit membership organization, whose work underpins quality infrastructure and international trade in electrical and electronic goods. The IEC facilitates technical innovation, affordable infrastructure development, efficient and sustainable energy access, smart urbanization and transportation systems, climate change mitigation, and increases the safety of people and the environment.

The IEC brings together ~170 countries and provides a global, neutral and independent standardization and conformity assessment platform for 30 000 experts globally. It administers 4 Conformity assessment systems whose members certify that devices, systems, installations, services and people work as required.

The IEC publishes around 10 000 IEC International Standards which together with conformity assessment provide the technical framework that allows governments to build national quality infrastructure and companies of all sizes to buy and sell consistently safe and reliable products in most countries of the world. IEC International Standards serve as the basis for risk and quality management and are used in testing and certification to verify that manufacturer promises are kept.