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{| class="wikitable"
|-
! Code letters
! First characteristic numeral: Solid particle protection
! Second digit: Liquid ingress protection
! Third digit: Mechanical impact resistance
! Additional letter: Other protections
! Supplementary letter: Other protections
|-
| IP (Ingress Protection)
| Single numeral: 0–6 or letter X | Single numeral: 0–8 or letter X | Single numeral: 0–9 | Single letter | Single letter |-
| Required
| Required
| No longer used
| Optional
| Optional
|}
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! Level sized !! Effective against !! Description
|-
! X
| —
| X means no data is available to specify a protection rating about this criterion.
|-
! 0
| —
|-
! 1
| > {{convert|50|mm|abbr=on|disp=br}}
| Any large surface of the body, such as the back of a hand, but no protection against deliberate contact with a body part |-
! 2
| > {{convert|12.5|mm|abbr=on|disp=br}}
| Fingers or similar objects |-
! 3
| > {{convert|2.5|mm|abbr=on|disp=br}}
| Tools, thick wires, etc. |-
! 4
| > {{convert|1|mm|abbr=on|disp=br}}
| Most wires, slender screws, large ants, etc. |-
! 5
| Dust protected
|-
! 6
| Dust-tight
|}
===Second digit: Liquid ingress protection===
The second digit indicates the level of protection that the enclosure provides against harmful ingress of water.<ref name="NE Laser">{{citation|title=Ingress Protection: The System of Tests and Meaning of Codes|url=http://www.ce-mag.com/archive/06/ARG/bisenius.htm|archive-url=https://web.archive.org/web/20130522115323/http://www.ce-mag.com/archive/06/ARG/bisenius.htm|archive-date=2013-05-22|url-status=dead}}.<!-- http://www.webcitation.org/6DGYoRMwp?url=http://www.ce-mag.com/archive/06/ARG/bisenius.htm --></ref>
The ratings for water ingress are not cumulative beyond IPX6. A device compliant with IPX7 (covering water immersion) is not necessarily compliant with IPX5 or IPX6 (covering exposure to water jets). A device that meets both tests is indicated by listing both tests separated by a slash, e.g. IPX5/IPX7.
{| class="wikitable"
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|-
! X
| —
| —
| X means no data is available to specify a protection rating concerning these criteria.
▲|-
|-
! 0
| None
| — | No protection against ingress of water |-
! 1
| Dripping water
| Test duration: 10 minutes
Water equivalent to {{convert|1|mm|in|abbr=on}} rainfall per minute
|-
! 2
| Dripping water when tilted at 15°
| Vertically dripping water shall have no harmful effect when the enclosure is tilted at an angle of 15° from its normal position. A total of four positions are tested within two axes. || Test duration: 2.5 minutes for every direction of tilt (10 minutes total)<br /> Water equivalent to {{convert|3|mm|in|abbr=on}} rainfall per minute
|-
! 3
| Spraying water
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 a shield in place) for 5 minutes minimum.
Test duration: 1 minute per square meter for at least 5 minutes{{sfn|IEC 60529|2013|p=27}}
Water volume: {{convert|10|liter/min}}
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|-
! 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.
b) is conducted (without shield) for 5 minutes minimum.
|
|-
! 5
| Water jets || Water projected by a nozzle ({{convert|6.3|mm|in|abbr=on}}) against enclosure from any direction shall have no harmful effects.
| Test duration: 1 minute per square meter for at least 3 minutes Water volume: 12.5 litres per minute
Pressure: {{convert|30|kPa|psi|abbr=on|adj=on}} at distance of {{convert|3|meters}}
|-
! 6
| Powerful water jets
| Test duration: 1 minute per square meter for at least 3 minutes
Water volume: {{convert|100|liters/min}}
Pressure: {{convert|100|kPa|psi|abbr=on|adj=on}} at distance of {{convert|3|meters}}
|-
! 6K
| Powerful water jets with increased pressure
| Water projected in powerful jets ({{convert|6.3|mm|in|abbr=on}} nozzle) against the enclosure from any direction, under elevated pressure, shall have no harmful effects. Found in DIN 40050, and not IEC 60529. || Test duration: at least 3 minutes{{Citation needed|date=July 2016}}<br /> Water volume: {{convert|75|liters/min}}
Pressure: {{convert|1000|kPa|psi|abbr=on|adj=on}} at distance of {{convert|3|meters}}
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Depth specified by the manufacturer, generally up to {{convert|3|meters}}
|-
! 9
| Powerful high-temperature water jets
| Smaller specimens rotate slowly on a turntable from 4 specific angles. Larger specimens are mounted in the intended position when used, no turntable required, and are tested freehand for at least 3 minutes at a distance of {{convert|0.15|-|0.2|meters}}.
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Water temperature: {{convert|80|C}}
|}
(All tests with the letter "K" are defined by ISO 20653 (replacing DIN 40050-9) and are not found in IEC 60529, except for IPx9, which is the same as the IP69K water test.)
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|-
! NEMA enclosure<ref>{{cite web |url=https://www.nema.org/Products/Documents/nema-enclosure-types.pdf |title=NEMA Enclosure Types |date=November 2005 |publisher=National Electrical Manufacturers Association |access-date=10 January 2017 |pages=7–9 |archive-date=10 June 2018 |archive-url=https://web.archive.org/web/20180610223224/https://www.nema.org/Products/Documents/nema-enclosure-types.pdf |url-status=dead }}</ref>
! IP
|-
| 1 || IP20
| |||