An IP Rating represents the level of protection provided by a device against the intrusion of solid objects and liquids. An IP Rating usually has two numbers: The first number represents the level of protection from solid materials and the second number represents the level of protection from liquids. A third letter describing other information can be used but is often omitted.
Protection against solids
The first digit of an IP Rating is a number that describes the object's protection against solids, with 0 offering no protection and 6 offering the most protection.
Protection against liquids
The second digit of an IP rating is a number that describes the level of protection against liquids, with 0 offering no protection and 9K offering the most protection.
Other protections
A letter can describe other information related to the protection of the enclosure. This is optional and not commonly used.
| First digit | Intrusion protection | Second digit | Moisture protection |
|---|---|---|---|
| 0 | No protection. | 0 | No protection. |
| 1 | Protected against solid objects over 50mm, e.g. accidental touch by hands. | 1 | Protected against vertically falling drops of water, e.g. condensation. |
| 2 | Protected against solid objects over 12mm, e.g. fingers. | 2 | Protected against direct sprays of water up to 15 degrees from the vertical. |
| 3 | Protected against solid objects over 2.5mm, e.g. tools & wires. | 3 | Protected against direct sprays of water up to 60 degrees from the vertical. |
| 4 | Protected against solid objects over 1mm, e.g. wires & nails. | 4 | Protected against water splashed from all directions, limited ingress permitted. |
| 5 | Protected against dust limited ingress, no harmful deposits. | 5 | Protected against low pressure jets of water from all directions, limited ingress permitted. |
| 6 | Totally protected against dust. | 6 | Protected against strong jets of water, e.g. on ships deck, limited ingress permitted. |
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