| FIRST NUMBER Protection against solid objects | SECOND NUMBER Protection against liquids | IK CODE Protection against mechanical impacts |
| IP | TEST | IP | TEST | IK | TEST |
| 0 |  | no protection | 0 | | no protection | 00 | | no protection |
| 1 | protected against solid objects over 50 mm e.g. accidental touch by hands | 1 | protected against vertically falling drops of water | 01-05 | impact < 1 joule |
| 2 | protected against solid objects over 12 mm e.g. fingers | 2 | protected against direct sprays of water up to 15 ° from the vertical | 06 | impact 1 joule |
| 3 | protected against solid objects over 2,5 mm (tools +small wires) | 3 | protected against sprays to 60° from the vertical | 07 | impact 2 joule |
| 4 | protected against solid objects over 1 mm (tools + small wires) | 4 | protected against water sprayed from all directions – limited ingress permitted | 08 | impact 5 joule |
| 5 | protected against dust – limited ingress permitted (no harmful deposit.) | 5 | protected against low pressure jets of water from all directions – limited ingress permitted | 09 | impact 10 joule |
| 6 | totally protected against dust | 6 | protected against strong jets of water e g for use on ship decks – limited ingress permitted | 10 | impact 20 joule |
| | 7 | protected against the affects of immersion between 15 cm and 1 m | | |
| | 8 | protected against long periods of immersion under pressure | | |
