Ingress Protection - Explained

The IP classification system designates by means of a number, the degree of protection provided by an enclosure against impact or dust and water ingress.  Please note that the IP classification should not be construed as indicating corrosion resistance.

Degrees of Protection to IEC 529

FIRST NUMBER
Degree of Protection against solid objects

0	Non-protected
1	Protected against a solid object greater than 50mm, such as a hand
2	Protected against a solid object greater than 12mm, such as a finger
3	Protected against a solid object greater than 2.5mm, such as a tool or wire
4	Protected against a solid object greater than 1.0mm, such as wire or thin strips
5	Dust-protected.  Prevents ingress of dust sufficient to cause harm.
6	Dust tight.  No dust ingress.

SECOND NUMBER
Degree of Protection against water

0	Non-protected
1	Protected against a water dripping vertically, such as condensation
2	Protected against dripping water when tilted up to 15°
3	Protected against water spraying at an angle of up to 60°
4	Protected against water splashing from any direction
5	Protected against jets of water from any direction
6	Protected against heavy seas or powerful jets of water.  Prevents ingress sufficient to cause harm.
7	Protected against harmful ingress of water when immersed between a depth of 150mm to 1 metre
8	Protected against submersion.  Suitable for continuous immersion in water