The protection class indicates the suitability of electrical equipment for different environmental conditions and the protection afforded to persons against potential hazards arising from the use of such equipment.
- Degree of protection against foreign objects (1st digit)
- Degree of protection against water (2nd digit)
Code number | Brief description | Definition |
---|---|---|
0 | Not protected | - |
l | Protection against solid objects of 50 mm or greater in diameter | The access probe, a sphere of 50 mm in diameter, shall not fully penetrate the enclosure. |
2 | Protection against solid objects of 12.5 mm or greater in diameter | The access probe, a sphere of 12.5 mm in diameter, shall not fully penetrate the enclosure. |
3 | Protection against solid objects of 2.5 mm or greater in diameter | The access probe, a sphere of 2.5 mm in diameter, shall not penetrate the enclosure at all. |
4 | Protection against solid objects of 1.0 mm or greater in diameter | The access probe, a sphere of 1 mm in diameter, shall not penetrate the enclosure at all. |
5 | Protected against dust | The ingress of dust is not completely prevented. The quantity of dust that enters must not impair the safety or satisfactory operation of the equipment. |
6 | Dustproof | No ingress of dust |