The following table and image will certainly help a lot.
| Protection against solid materials | | Protection against liquid materials |
| 1° number | Description | | 2° number | Description |
| 0 | No protection | | 0 | No protection |
| 1 | Protection from solid objects with a diameter greater than 50mm. | | 1 | Protection from water drops from above. |
| 2 | Protection from solid objects with a diameter greater than 12mm. | | 2 | Protection from drops of water deviated, with respect to the vertical, by a maximum of 15 °. |
| 3 | Protection from solid objects with a diameter greater than 2.5mm. | | 3 | Protection against splashing water with a maximum inclination of 60 °. |
| 4 | Protection from solid objects with a diameter greater than 1mm. | | 4 | Protection from splashing water from all directions. |
| 5 | Dust protection: the entry is not completely prevented, but the equipment is still able to function. | | 5 | Protection against low pressure jets of water from all directions. |
| 6 | Total protection from dust. | | 6 | Protection from sea waves or strong jet of water from any direction. |
| - | - | | 7 | Protection against immersion for a limited period and under precise pressure conditions. |
| - | - | | 8 | Continuous immersion protection under precise pressure conditions. |