I.P. Rating
A three digit number, as specified in EN60529 and Australian Standard AS1939,
is used to provide an Ingress Protection Rating to a piece of electronic equipment
or to an enclosure for electronic equipment.
The three digits represent three different forms of environment influence:
The first digit represents protection against ingress of solid objects.
The second digit represents protection against ingress of liquids.
The third digit represents protection against mechanical impact damage.
The third digit is often omitted, resulting in a 2 digit IP rating covering
ingress against solid and liquids only.
The larger the value of each digit, the greater the protection from the corresponding
environmental influence. As an example. a product rated as IP573 would be better
protected against environmental factors than another similar product that was
only rated as IP432. The third digit (mechanical impact) may be omitted/
Value
|
First Digit
|
| 0 |
No protection
|
| 1 |
Protected against solid objects over 50mm e.g. hands, large tools |
| 2 |
protected against solid objects over 12mm e.g. hands, large tools |
| 3 |
Protected against solid objects over 2.5mm, e.g. wire, small tools |
| 4 |
protected against objects over 1.0mm e.g. wires |
| 5 |
Limited protection against dust ingress, e.g. no harmful deposit |
| 6 |
Totally protected against ingress. |
Value
|
Second Digit
|
| 0 |
No protection |
| 1 |
Protected against vertically falling drops of water |
| 2 |
Protected against direct sprays of water up to 15° from vertical |
| 3 |
Protected against direct sprays of water up to 60° from vertical |
| 4 |
Protected against water sprayed from and direction
Limited ingress permitted |
| 5 |
Protected against low pressure water jets from any direction.
Limited ingress permitted |
| 6 |
Protected against high pressure water jets from any direction.
Limited ingress permitted |
| 7 |
Protected against immersion between 15cm and 1M |
| 8 |
Protected against long periods of immersion under pressure |
value
|
Third Digit
|
| 0 |
No protection |
| 1 |
Protected against 0.225 joule impact (150g @ 15cm) |
| 2 |
Protected against 0.375 joule impact (250g @ 15cm) |
| 3 |
Protected against 0.5 joule impact (250g @ 20cm) |
| 4 |
|
| 5 |
Protected against 2.0 joule impact (500g @ 40cm) |
| 6 |
|
| 7 |
Protected against 6.0 joule impact (1.5Kg @ 40cm) |
| 8 |
|
| 9 |
Protected against 20 joule impact (5Kg @ 40cm) |
|
or 
