IP Rating
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.
Example: IP66
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. Therefore submercible IP67 and IP68 ratings are required to protect against 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 |
(Liquids)
(EN60529)