IEC 60529:1989 pdf download.Degrees of protection provided by enclosures (IP Code)
6. Degrees of protection against ingress of water indicated by the second characteristic numeral
The second characteristic numeral indicates the degree of protection provided by enclosures with respect to harmful effects on the equipment due to the ingress of water.
The tests for the second characteristic numeral are carried out with fresh water. The actual protection may not be satisfactory if cleaning operations with high pressure and/or solvents are used.
Table 1II gives brief descriptions and definitions of the protection for the degrees represented by the second characteristic numeral.
Degrees of protection listed in this table shall be specified only by the second characteristic numeral and not by reference to the brief description or definition.
The tests are specified in Clause 14.
Up to and including second characteristic numeral 6， the designation implies compliance also with the requirements for all lower characteristic numerals. However, the tests establishing compliance with any one of the lower degrees of protection need not necessarily be carried out provided that these tests obviously would be met if applied.
Enclosures for “versatile" application indicated in the last column shall meet requirements for exposure to both water jets and temporary or continuous immersion.
Enclosures for “restricted" application indicated in the last column are considered suitable only for temporary or continuous immersion and unsuitable for exposure to water jets.
7. Degrees of protection against access to hazardous parts indicated by the additional letter
The additional letter indicates the degree of protection of persons against access to hazardous parts.
Additional letters are only used
- if the actual protection against access to hazardous parts is higher than that indicated by the first characteristic numeral
- or if only the protection against access to hazardous parts is indicated, the first characteristic numeral being then replaced by an X.
For example, suich higher protection may be provided by barriers, suitable shape of openings or distances inside the enclosure.
Table IV gives access probes considered by convention as representative of parts of the human body or objects held by a person
and the definitions for the degrees of protection against access to hazardous parts, indicated by additional letters.
An enclosure shall only be designated with a stated degree of protection indicated by the additional letter if the enclosure also complies with all lower degrees of protection.However, the tests establishing compliance with any one of the lower degrees of
protection need not necessarily be . carried out provided that these tests obviously would be met if applied.
The tests are specified in Clause 15.See Annex A for examples of the IP Coding.IEC 60529 pdf download.