What is “IP” Rating(Ingress Protection)

IP Ratings are 2-digit numbers which represent the Electro Technical Commission's Ingress Protection rating to a piece of electronic equipment or its enclosure.
The first digit represents the level of protection from solid objects (0-6), and the second digit represents protection from ingress of liquids (0-8); see IP table below.
For example, an Underwater LED Spotlight with an IP rating of 68 (IP68) represents total protection against dust ingress, and total protection against long periods of immersion in water.
A High Power LED Flood Light with an IP rating of 65 (IP65) has total protection against dust ingress, with protection against low pressure water jets from any direction.


IP First number - Protection against solid objects


0     No special protection
1     Protected against solid objects over 50 mm, e.g. accidental touch by person’s hands.
2     Protected against solid objects over 12 mm, e.g. persons fingers.
3     Protected against solid objects over 2.5 mm (tools and wires).
4     Protected against solid objects over 1 mm (tools, wires, and small wires).
5     Protected against dust limited ingress (no harmful deposit).
6     Totally protected against dust.


IP Second number - Protection against liquids


0     No protection.
1     Protection against vertically falling drops of water e.g. condensation.
2     Protection against direct sprays of water up to 15o from the vertical.
3     Protected against direct sprays of water up to 60o from the vertical.
4     Protection against water sprayed from all directions - limited ingress permitted.
5     Protected against low pressure jets of water from all directions - limited ingress.
6     Protected against temporary flooding of water, e.g. for use on ship decks - limited ingress permitted.
7     Protected against the effect of immersion between 15 cm and 1 m.
8     Protects against long periods of immersion under pressure.