According to CEI 70-1 Norm is described below:
The degree of protection of the housing of electrical equipment with rated voltage not exceeding 72.5KV.
The first digit indicates the degree of protection against contact of external solid bodies and against access to parts Dangerous; the second digit indicates the protection against the penetration of liquids.
1st digit: protection against contact of external solid bodies and against access to dangerous parts.
|digit||Protection of the material – protection of persons|
|1||Protected against solid bodies larger than 50mm. Protected against access with the back of the hand|
|2||Protected against solid bodies larger than 12mm. Protected against access with a finger|
|3||Protected against solid bodies larger than 2.5mm. Protected against access by a tool|
|4||Protected against solid bodies larger than 1mm. Protected against access with a thread|
|5||Protected against dust and protected against access by a wire|
|6||Fully protected against dust and protected against access by a wire|
2nd digit: Protection against liquid penetration
|1||Protected against vertical dropping of water drops|
|2||Protected against drops of water droplets with a maximum tilt of 15°|
|3||Protected against rain|
|4||Protected against splashes of water|
|5||Protected against water jets|
|6||Protected against waves|
|7||Protected against diving effects|
|8||Protected against the effects of submersion|
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Post time: Aug-28-2017