Ingress Protection (IP) rating codes

The IP (Ingress Protection rating) code classifies and rates the degree of protection provided against the intrusion of solid objects and water in mechanical casings.

The digits indicate conformity with the conditions summarized in the tables below. The first digit after IP relates to protection against the intrusion of solid objects, the second digit relates to protection against water. Where there is no protection rating with regard to one of the criteria, the digit is replaced with the letter X.

Solid particle protection codes

Level Object size
protected against
Effective against
0 No protection against contact and ingress of objects
1 >50 mm Any large surface of the body, such as the back of a hand, but no protection against deliberate contact with a body part
2 >12.5 mm Fingers or similar objects
3 >2.5 mm Tools, thick wires, etc.
4 >1 mm 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

Liquid ingress protection codes

Level Protected against Testing for
0 Not protected
1 Dripping water Dripping water (vertically falling drops) shall have no harmful effect.

Test duration: 10 minutes
Water equivalent to 1mm rainfall per minute
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.

Test duration: 10 minutes
Water equivalent to 3mm rainfall per minute
3 Spraying water Water falling as a spray at any angle up to 60° from the vertical shall have no harmful effect.

Test duration: 5 minutes
Water volume: 0.7 litres per minute
Pressure: 80–100 kPa
4 Splashing water Water splashing against the enclosure from any direction shall have no harmful effect.

Test duration: 5 minutes
Water volume: 10 litres per minute
Pressure: 80–100 kPa
5 Water jets Water projected by a nozzle (6.3 mm) against enclosure from any direction shall have no harmful effects.

Test duration: at least 3 minutes
Water volume: 12.5 litres per minute
Pressure: 30 kPa at distance of 3m
6 Powerful water jets Water projected in powerful jets (12.5 mm nozzle) against the enclosure from any direction shall have no harmful effects.

Test duration: at least 3 minutes
Water volume: 100 litres per minute
Pressure: 100 kPa at distance of 3m
7 Immersion up to 1 m 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).

Test duration: 30 minutes
Immersion at depth of 1m
8 Immersion beyond 1 m 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.

Test duration: continuous immersion in water
Depth specified by manufacturer

Source: Wikipedia.org