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IP stands for 'Ingress Protection'
An IP number is used to specify the environmental protection of enclosures around electronic equipment. These 
ratings are determined by specific tests.
The IP number is composed of two numbers, the first referring to the protection against solid objects and the second against liquids. The higher the number, the better the protection.
ratings are determined by specific tests.The IP number is composed of two numbers, the first referring to the protection against solid objects and the second against liquids. The higher the number, the better the protection.
First Number - Protection against solid objects
| 0 | - No protection (Sometimes X) |
| 1 | - Protected against solid objects up to 50mm³ |
| 2 | - Protected against solid objects up to 12mm³ |
| 3 | - Protected against solid objects up to 2.5mm³ |
| 4 | - Protected against solid objects up to 1mm³ |
| 5 | - Protected against dust, limited ingress (no harmful deposit) |
| 6 | - Totally protected against dust |
Second Number -Protection against liquids
| 0 | - No protection (Sometimes X) |
| 1 | - Protection against vertically falling drops of water (e.g. condensation) |
| 2 | - Protection against direct sprays of water up to 15 degrees from vertical |
| 3 | - Protection against direct sprays of water up to 60 degrees from 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 permitted |
| 6 | - Protected against low pressure jets of water, limited ingress permitted (e.g. ship deck) |
| 7 | - Protected against the effect of immersion between 15cm and 1m/td> |
| 8 | - Protected against long periods of immersion under pressure |