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The protection of persons against direct contacts is required by certain regulations (in France the Decret of the 14th of November 1988), and specified by electrical installation standards, such as IEC 364. On the other hand, types of external stresses likely to influence the behaviour of equipment are described in IEC 721-2. The protection against some of these influences is often specified in product standards.
Therefore, to explain the degrees of protection that enclosures can provide, and how standards codify them, constitutes an essential information for all, prescribers, installers, operators and inspecting organizations.
1. Introduction
2. General
Definitions
Uses of a code system
3. The IP Code
General
First numeral
Second numeral
Additional letter
Supplementary letter
4. The IK Code
Introduction
Degrees of protection
5. Application to the design of electrical equipment
6. Conclusion
Appendix 1: correspondence between the IP code and water-tests of IEC 68-2-18
Appendix 2: equivalence between the old third numerals of the french IP code and IK code
Appendix 3: bibliography
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