EEN 60529 provides for an international classification system for the sealing effectiveness of enclosures of electrical equipment against the intrusion into the equipment of foreign bodies (i.e. tools, dust, fingers) and moisture.
Special symbols in the IP classification system may be used on products to illustrate the IP protection provided. A "1st digit" representation of Numbers 5 & 6 is a grid-like symbol. Tear drops represent "2nd digit" with one teardrop for Numbers 3 & 4, two teardrops for Nos. 5, 6, & 7, and two teardrops with specified depth for No. 8. | |||||||||||
1st digit | symbol | protection | explanation | ||||||||
0 | No protection | - | |||||||||
1 |  | Protection against large foreign bodies | Protection of persons from accidental large area direct contact with active or internal moving parts (e.g. hand contact), but no guarding against intentional access to such parts. Protection of the object from access of solid foreign matter larger than Ø50mm. | ||||||||
2 |  | Protection against medium foreign bodies | Protection of persons from finger contact with active or internal moving parts. Protection of the object from access of solid foreign matter larger than Ø12mm. | ||||||||
3 |  | Protection against small foreign bodies | Protection of persons from contact with active or internal moving parts with tools, wires or similar foreign matter thicker than Ø2.5mm. Protection of the object from access of solid foreign matter larger than Ø2.5mm. | ||||||||
4 |  | Protection against granular foreign bodies | Protection of persons from contact with active or internal moving parts with tools, wires or similar foreign matter thicker than or > than Ø1mm. | ||||||||
5 |  | Protection against deposits of dust | Total protection of persons from contact with voltage carrying or internal moving parts. Protection of the object from harmful deposits of dust. Ingress of dust is not completely prevented, but dust is prevented from entering in a quantity that would impair the functioning of the object. | ||||||||
6 |  | Protection against ingress of dust | Total protection of persons from contact with voltage carrying or internal moving parts. Protection of the object from ingress of dust. | ||||||||
2nd digit | symbol | protection | explanation | ||||||||
0 | No protection | - | |||||||||
1 |  | Protection against water dripping vertically | Water drops falling vertically must not have any harmful effect. | ||||||||
2 |  | Protection against water dripping up to 15° | Water drops falling at any angle up to 15° from vertical must not have any harmful effect. | ||||||||
3 |  | Protection against spray water | Water hitting the object at any angle up to 60° from vertical must not have any harmful effect. | ||||||||
4 |  | Protection against splash water | Water splashing against the object from all directions must not have any harmful effect | ||||||||
5 |  | Protection against jet water | A jet of water aimed against the object from all directions must not have any harmful effect. | ||||||||
6 |  | Protection against flooding | Water as temporary flooding, as in heavy seas, must not enter the object in any harmful quantity. | ||||||||
7 |  | Protection against dipped state | If the object is dipped into water (150mm to 1000mm), under the defined conditions of pressure and time, water must not enter the object in any harmful quantity. | ||||||||
8 |  | Protection during submerged state | If the object is submerged in water under defined extreme conditions, water must not enter the object in any harmful quantity. | ||||||||
From the Chart, IP 54 would indicate equipment that had:
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