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IEC 529/IP Environmental Ratings

Complied by Rittal, www.rittal.com

The degree of protection provided by an enclosure is indicated by the IP code in the following way: I P 2 3
First characteristic numeral – e.g. protection against solid foreign objects of 12.5mm diameter and greater
Second characteristic numeral – e.g. protected against spraying water

Degrees of Protection Against Solid Objects
Description Definition First Characteristic Numeral
Non-protected 0
Protected against solid foreign objects of 50mm diameter and greater The object probe, sphere of 50mm diameter shall not fully penetrate 1
Protected against solid foreign objects of 12.5mm diameter and greater The object probe, sphere of 12.5mm diameter shall not fully penetrate 2
Protected against solid foreign objects of 2.5mm diameter and greater The object probe, sphere of 2.5mm diameter shall not penetrate at all 3
Protected against solid foreign objects of 1.0mm diameter and greater The object probe, sphere of 1.0mm diameter shall not 4
Dust protected Ingress of dust is not totally prevented, but dust shall not penetrate in a quiantity to interfere with satisfactory operation of the apparatus or to impair safety 5
Dust tight No ingress of dust 6

Degrees of Protection Against Water
Second characteristic numeral Description Definition
0 No protection
1 Protected against vertically falling water drops Vertically falling water drops shall have no harmful effects
2 Protected against vertically falling water drops when enclosure tilted up to 15 degrees Vertically falling water drops shall have no harmful effects when the enclosure is tilted at any angle up to 15 degrees on either side of the vertical axis
3 Protected against spraying water Water sprayed at an angle up to 60 degreed on either side of the vertical axis shall have no harmful effects
4 Protected against splashing water Water splashed against the enclosure from any direction shall have no harmful effects
5 Protected against water jets Water projected in jets against the enclosure from any direction shall have no harmful effects
6 Protected against powerful water jets Water projected in powerful water jets against the enclosure from any direction shall have no harmful effects
7 Protected against the effects of temporary immersion in water Ingress of water in quantities causing harmful effects shall not be possible when the enclosure is continuously immersed in water under standardized conditions of pressure and time
8 Protected against the effects of continuous immersion in water Ingress of water in quantities causing harmful effects shall not be possible when the enclosure is continuously immersed in water under

NEMA Type rating UL Type rating CSA Type rating Apprx. IEC/IP classification
1 1 1 IP23
2 2 2 IP30
3 3 3 IP64
3R 3R 3R IP32
4 4 4 IP66
4X 4X 4X IP66
6 6 6 IP67
12 12 12 IP55
13 13 13 IP65