A two-digit number established by the International Electro-Technical Commission is used to provide an Ingress Protection rating to a piece of electronic equipment or to an enclosure for electronic equipment.
The protection class after EN60529 are indicated by short symbols that consist of the two code letters IP and a code numeral for the amount of the protection.
The two digits represent different forms of environmental influence:
• The first digit represents protection against ingress of solid objects.
• The second digit represents protection against ingress of water.
*Note: The IP rating system does not test or qualify protection against levels of condensing and/or non condensing humidity.
|First Digit (Solids)||Second Digit (Liquids)||Test Duration EN 60529|
|0: No protection||0: No protection|
|1: >50mm objects||1: Dripping water||10 min|
|2: >12.5mm objects||2: Dripping water at 15 degrees||10 min|
|3: >2.5mm objects||3: Spraying water||5 min|
|4: >1mm objects||4: Splashing water||3 min|
|5: Dust protected||5: Water-jets||3 min|
|6: Dust-tight||6: Powerfull water-jets||3 min|
|7: Temparary submersion < 1 metre||30 min|
|8: Perminant submersion < 1 metre|