"Ingress Protection" is an international rating system classifying the degrees of protection an enclosed system has against foreign objects. The first digit is used for solids (dust), the second digit is for liquids (water).
First Digit
| 0 |
No special protection. |
| 1 |
Protection from a large part of the body such as a hand (but no protection from deliberate access); from solid objects greater than 50mm in diameter. |
| 2 |
Protection against fingers or other object not greater than 80mm in length and 12mm in diameter. |
| 3 |
Protection from entry by tools, wires, etc., with a diameter of thickness greater than 1.0mm. |
| 4 |
Protection from entry by solid objects with a diameter or thickness greater than 1.0mm. |
| 5 |
Protection from the amount of dust that would interfere with the operation of the equipment. |
| 6 |
Dust tight. |
Second Digit
| 0 |
No special protection. |
| 1 |
Protection from dripping water. |
| 2 |
Protection from vertically dripping water. |
| 3 |
Protection from sprayed water. |
| 4 |
Protection from splashed water. |
| 5 |
Protection from water projected from a nozzle. |
| 6 |
Protection against heavy seas, or powerful jets of water. |
| 7 |
Protection against immersion. |
| 8 |
Protection against complete, continuous submersion in water. |
