Home » IP and IPX | Ingress or International Protection Rating | Water Proof

Both IP and IPX refers to Ingress Protection or International Protection rating. IP rating indicates the water proofing ability and dust resistance of a piece of an electrical equipment. When only water proofing test is done, it is indicated with an IPX follows by a number. When both water proofing and dust resistance are tested, it is indicated with IP follows by 2 numbers. E.g. IP67. The first number represents the dust resistance while the second number represents the water proofing ability. Sometimes, an equipment is tested for dust resistance and not for water proofing.  In this case, it will be indicated with “IP” follow by a number and then an “X” behind, e.g. IP5X.


IP dustIP water

An equipment with IPX5 and above rating would be more suitable for outdoor sporting activities in terms of water proofing.  IPX7 and above would be suitable for more rugged outdoor water activities.

List of IPX ratings

The digits which follow after IPX shows the resistance level of an equipment as shown in the table below:

IPX Rating Protected against Testing for Details
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° 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 kN/m2
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 kN/m2
5 Water jets Water projected by a nozzle (6.3mm) 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 kN/m2 at distance of 3m
6 Powerful water jets Water projected in powerful jets (12.5mm 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 kN/m2 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

Dust Resistance Ability

For dust resistance ability (i.e. the first number after IP), please refer to the table below.

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.

When the IP rating is IP67, it means the equipment is dust tight and water proof up to 1 meter deep.

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