What is the IP Grade and the details of IP Grade ?

IP Grade aslo called IP Ratings(Ingress protection).with two digit number established by the International Electro

 Technial Commission,is used to provide an Ingress Protection rating to a piece of electronic equipment or to an enclosure

for electronic equipment.The protection class after EN60529 are indicated by short symbols that consist of the two code letters                     IP and a code numberal for the amount for the protection.

Example:IP68

 The first digit of 6 represent protection against ingress of solid objects.

 The second digit 8 represent protection against ingress of liquids.

 Ip                       IP First Number-Protection against solid objects

0.No special protection

         1 .Protected against solid objects up to 50 mm, e.g. accidental touch by persons hands.

2 .Protected against solid objects up to 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.

Referenced from: https://www.mpl.ch/info/IPratings.html