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This standard describes a system for classifying the degrees
of protection provided by the enclosures of electrical equipment. Developed by
the European Committee for Electro-technical Standardization (CENELEC), these
standards are designed to numerically rate an electrical product on the level of
protection its enclosure provides. By assigning different number codes, the
product's degree of protection can be identified quickly and easily. In the code
IP 54, for example, IP identifies this standard, the 5 describes the level of
protection from solid objects, and 4 describes the level of protection from
liquids.
First
Characteristic
Numeral |
DEGREE OF PROTECTION (First Number in Code) |
| Brief Description |
Definition |
| 0 |
Not protected |
__ |
| 1 |
Protected against solid foreign objects of
50mm diameter and greater. |
The object probe, sphere of 50mm diameter,
shall not fully penetrate.1 |
| 2 |
Protected against solid foreign objects of
12.5mm diameter and greater. |
The object probe, sphere of 12.5mm diameter,
shall not fully penetrate.1 |
| 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.1 |
| 4 |
Protected against solid foreign objects of
1mm diameter and greater. |
The object probe, sphere of 1mm diameter,
shall not penetrate at all.1 |
| 5 |
Dust-protected |
Ingress of dust is not totally prevented, but
dust shall not penetrate in a quantity to interfere with
satisfactory operation of the apparatus or to impair safety. |
| 6 |
Dust-tight |
No ingress of dust.
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| 1 The
full diameter of the object shall not pass through an opening of the
enclosure |
Second
Characteristic
Numeral |
DEGREE OF PROTECTION (Second Number in Code) |
| Brief Description |
Definition |
| 0 |
Not protected |
__ |
| 1 |
Protected against vertically falling water
drops. |
Vertically falling drops shall have no
harmful effects. |
| 2 |
Protected against vertically falling water
drops when enclosure is titled up to 15°. |
Vertically falling drops have no harmful
effects when the enclosure is tilted at any angle up to 15° on
either side of the vertical. |
| 3 |
Protected against spraying water. |
Water sprayed at an angle up to 60° degrees
on either side of the vertical 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 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
temporarily immersed 1 meter 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 the user, but are more severe than
for number 7. |
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