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Industrial IP Rating Guide

This guide classifies and rates the degree of protection provided against intrusion of solids and liquids by mechanical casings and electrical enclosures.

What is an IP rating?
IP (or "Ingress Protection") ratings are used to classify levels of sealing effectiveness of electrical enclosures against intrusion from body parts, dirt, dust, water, moisture and more.

What do the numbers in an IP rating mean?
An IP rating first starts with the letters IP followed by two numbers. The first number indicates the level of protection the enclosure provides against moving parts, as well as the protection of enclosed equipment from foreign bodies. The second indicates the level of protection that the enclosure provides against various forms of moisture (drips, sprays, submersion etc).


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Solid Protection

Level Degree of Protection Description
0 - No protection against contact and ingress of objects
1 >50mm Any large surface of the body, such as the back of a hand, but no protection against deliberate contact with a body part.
2 >12.5mm Fingers or similar objects.
3 >2.5mm Tools, thich wires, etc.
4 >1mm Most wires, slender screws, large ants, etc.
5 Dust Protected Ingress of dust is not entirely prevented, but it much not enter in sufficient quantity to interfere with the satisfactory operation of the equipment.
6 Dust Tight No ingress of dust; complete protection against contact (dust tight). A vacuum must be applied. Test duration of up to 8 hours based on air flow.

Liquid Protection

Level Degree of Protection Description
0 - No protection against liquids.
1 Dripping Water Dripping water (vertically falling drops) shall have no harmfull effect on the specimin when mounted in a upright position onto a turntable and rotated at 1 RPM.
2 Dripping Water When Tilted at 15° Vertically dripping water shall have no harmfull effect when the enclosure is tilted at an angle of 15° from its normal position. A total of four positions are tested within two areas.
3 Spraying Water Water falling as a spray at any angle up to 60° from the vertical shall have no harmful effect, utilizing either: a) an oscillating fixture, or b) A spray nozzle with a counterbalanced shield. Test a) is conducted for 5 minutes, then repeated with the specimen rotated horizontally by 90° for the second 5-minute test. Test b) is conducted (with shield in place) for 5 minutes minimum.
4 Splashing of Water Water splashing against the enclosure from any direction shall have no harmful effect, utilizing either: a) an oscillating fixture, or b) A spray nozzle with no shield. Test a) is conducted for 10 minutes. Test b) is conducted (without shield) for 5 minutes minimum.
5 Water Jets Water projected by a nozzle (6.3 mm) against enclosure from any direction shall have no harmful effects.
6 Powerful Water Jets Water projected in powerful jets (12.5 mm nozzle) against the enclosure from any direction shall have no harmful effects.
6K Powerful Water jets With Increased Pressure Water projected in powerful jets (6.3 mm nozzle) against the enclosure from any direction, under elevated pressure, shall have no harmful effects. Found in DIN 40050, and not IEC 60529.
7 Immersion, up to 1m depth 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, up to 1m or more depth The equipment is suitable for continuous immersion in water under conditions which shall be specified by the manufacturer. 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. The test depth and/or duration is expected to be greater than the requirements for IPx7, and other environmental effects may be added, such as temperature cycling before immersion.
9K Powerful high temperature water jets Protected against close-range high pressure, high temperature spray downs. Smaller specimens rotate slowly on a turntable, from 4 specific angles. Larger specimens are mounted upright, no turntable required, and are tested freehand for at least 3 minutes at distance of 0.15–0.2 m.
There are specific requirements for the nozzle used for the testing.
This test is identified as IPx9 in IEC 60529.

This cross reference table is an approximation of NEMA and IEC classifications for reference only. Please consult the appropriate agency's requirements and test qualifications for complete information.



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