Enclosure IEC
529/IP Environmental
Ratings
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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
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Degrees of Protection Against Solid
Objects
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| First
Characteristic Numeral |
Description |
Definition |
| 0 |
Non-protected |
|
| 1 |
Protected against
solid foreign objects of 50mm diameter and greater |
The object probe,
sphere of 50mm diameter shall not fully penetrate |
| 2 |
Protected against
solid foreign objects of 12.5mm diameter and greater |
The object probe,
sphere of 12.5mm diameter shall not fully penetrate |
| 3 |
Protected against
solid foreign objects of 2.5mm diameter and greater |
The object probe,
sphere of 2.5mm diameter shall not penetrate at all |
| 4 |
Protected against
solid foreign objects of 1.0mm diameter and greater |
The object probe,
sphere of 1.0mm diameter shall not penetrate |
| 5 |
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 |
| 6 |
Dust tight |
No ingress of dust |
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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 conditions which shall be
agreed between manufacturer and user but which are more severe than for
numeral 7 |
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Source : Complied by www.rittal.com
Control Engineering
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March 1999
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