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RATINGS
The IP (International
Protection) rating given to a piece of electrical apparatus is a two digit code
indicating the degree of protection its enclosure affords it. The first digit
represents protection against penetration by solid objects accessing hazardous
parts, the second describing the enclosures, protection against the ingress of
water. An X in place of either digit means that either the enclosure has not been
tested or that the test is not applicable.
NOTE:
In the event of additional holes being drilled,
pierced or knockouts removed, suitable measures should be taken to restore the
product to its original rating IEC 529, BS EN 60529 does not apply tp protection
against the risk of explosion or conditions such as humidity, corrosive gases,
fungi or vermin. In certain cases equipment designed to be mounted in an enclosure
will contribute towards the stated IP rating, (e.g. pushbuttons mounted in an
enclosure). Different parts of enclosures can have different degrees of protection
and still conform to the standard.
|
First
digit
|
Mechanical protection
|
Second
digit
|
Water
ingress protection
|
|
0
|
|
No
protection
|
0
|
|
No protection |
|
1
|
 |
Protected
against solid objects up to 50mm, e.g. accidental
touch by hands
|
1
|
|
Protected against vertically falling drops of water e.g.
condensation |
|
2
|
 |
Protected
against solid objects up to 12mm, e.g. fingers
|
2
|
|
Protected against direct sprays of water up to 15o
from the vertical |
|
3
|
 |
Protected
against solid objects up to 2.5mm, e.g. tools
& wires
|
3
|
|
Protected against direct sprays of water up to 60o
from the vertical |
|
4
|
 |
Protected
against solid objects up to 1mm, e.g. wires,
nails etc.
|
4
|
|
Protected against water splashed from all directions,
limited ingress permitted |
|
5
|
 |
Protected
against dust limited ingress, not harmfull deposits
|
5
|
|
Protected against low pressure jets of water from all
directions, limited ingress permitted |
|
6
|
 |
Totally
protected against dust
|
6
|
|
Protected against strong jets of water e.g. on ships
deck, limited ingress permitted |
|
n/a
|
n/a
|
n/a
|
7
|
|
Protected
against the effects of temporary immersion between
15cm and 1m. Duration of test 30 minutes |
|
n/a
|
n/a
|
n/a
|
8
|
|
Protected
against long periods of immersion under pressure
|
| |
