The IP code consists of the letters IP followed by two digits and an optional letter. The digits (characteristic numerals) indicate conformity with the conditions summarized in the tables below. For example, an electrical skateboard rated IP65 is completely protected against contact (dust tight) and will not be damaged or become unsafe if water projected by a nozzle (6.3 mm) against enclosure from any direction.
Where there is no data available to specify a protection rating with regard to one of the criteria, the digit is replaced with the letter X. The digit 0 is used where no protection is provided.
A rating of X for one or more of the protection criteria can be erroneously misinterpreted as “no protection”. To illustrate, an electric skateboard rated IPX4 will almost certainly demonstrate a robust resistance to the ingress of particles, even though a rating for ingress of solids hasn’t been formally assigned. Hence, an X designation shouldn’t be automatically misconstrued as a lack of protection.
First digit: Solids
| Level | Object size protected against | Effective against |
|---|---|---|
| 0 | Not protected | No protection against contact and ingress of objects |
| 1 | >50mm | Any large surface of the body, such as the back of the hand, but no protection against deliberate contact with a body part. |
| 2 | >12.5mm | Fingers or similar objects. |
| 3 | >2.5mm | Tools, thick wires, etc. |
| 4 | >1mm | Most wires, screws, etc. |
| 5 | Dust Protected | Ingress of dust is not entirely prevented, but it must not enter in sufficient quantity to interfere with the satisfactory operation of the equipment; complete protection against contact. |
| 6 | Dust Tight | No ingress of dust; complete protection against contact. |
Second digit: Fluids
| Level | Object size protected against | Effective against |
|---|---|---|
| 0 | Not protected | – |
| 1 | Dripping water | Dripping water (vertically falling drops) shall have no harmfull effect. |
| 2 | Dripping water when tilted up to 15° | Vertically dripping water shall have no harmful effect when the enclosure is tilted at an angle up to 15° from its normal position. |
| 3 | Spraying water | Water falling as a spray at any angle up to 60° from the vertical shall have no harmful effect. |
| 4 | Splashing water | Water splashing against the enclosure from any direction shall have no harmful effect. |
| 5 | Water jets | Water projected by a nozzle (6.3mm) against enclosure from any direction shall have no harmful effects. |
| 6 | Powerful water jets | Water projected in powerful jets (12.5mm nozzle) against the enclosure from any direction shall have no harmful effects. |
| 7 | Immersion up to 1m | Ingress of water in harmful quantity shall not be possible when the enclosure is immersed in water under defined conditions of pressure and time (up to 1 m of submersion). |
| 8 | Immersion beyond 1m | The equipment is suitable for continuous immersion in water under conditions which shall be specified by the manufacturer. Normally, this will mean that the equipment is hermetically sealed. However, with certain types of equipment, it can mean that water can enter but only in such a manner that it produces no harmful effects. |
Please also watch the video below for a great explanation of the concept IP Codes