Farklı IP koruma sınıfları iki rakamdan oluşur.
Code one (index I) stands for the protection against solid foreign objects, while code number two (index II) about the water protection.
| Index I | Foreign bodies protection | Index II | Water protection |
| 0 | No protection against accidental contact, no protection against solid foreign bodies | 0 | No protection against water |
| 1 | Protection against contact with any large area by hand and against solid foreign bodies with Ø > 50 mm. | 1 | Protection against vertical water drips |
| 2 | Protection against contact with any large area by hand and against solid foreign bodies with Ø > 12 mm. | 2 | Protection against diagonal water drips(up to a 15° angle) |
| 3 | Protection against tools, wires or similar objects with Ø > 2.5 mm and against solid foreign bodies with Ø >2.5 mm | 3 | Protection against diagonal water drips(up to a 60° angle) |
| 4 | As index 3, however with Ø > 1 mm | 4 | Protection against splashed water from all directions |
| 5 | Protection against contact and interior injurious dust deposits | 5 | Protection against water (out of a nozzle) from all directions |
| 6 | Total protection against contact, protection against dust penetration | 6 | Protection against ingress of water in case of temporary flooding |
| 7 | Protection against ingress of water in case of temporary immersion | ||
| 8 | Protection against ingress of water in case of continuous immersion, requirements under agreement of user and manufacturer |
International protection classes according to DIN EN60529(IEC529/VDE 047 T1)
