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IP & IK Classifications

Ingress protection class of enclosures given in form of IP classification, a two digit coding which is shown below.

Cases have been tested according to IEC 520 or the newer EN60529 4:1992. The latter requires the second digit to be test from class 6 upwards

Separately to each level of class, thus the double marking IP66/IP67 indicates that the actual tests have been made for both levels

The new European standard for enclosures EN60439-6 Pro is on its way and will include the new IK impact test too this test is described in EN60439/50102


FIRST
NUMBER
Protection against solid objects
IP TEST
0 NO protection
1 Protected against
Solid objects up to
50mm – e.g.
Accidently touch by hands
2 Protected against
Solid objects over
12mm – e.g.
Fingers
3 Protected against
Solid objects over
2.5mm e.g.
Tools and small wires
4 Protected against
Solid objects over
1mm e.g.
Tools and small wires
5 Protected against
Dust – limited
Ingress permitted
NO harmful deposit
6 Totally protected
Against dust
SECOND
NUMBER
Protection against liquids
IP TEST
0 NO protection
1 Protected against
vertically falling
Drops of water
2 Protected against
direct sprays of
Water up to 15deg
from the vertical
3 Protected against
Sprays to 60deg
From the vertical
Limited ingress
4 Protected 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
strong jets of water
E.g.- for use on ship decks
Limited ingress permitted
7 Protected against
Effects of immersion
Between 15cm and 1m
8 Protected against
Long periods of immersion
Under pressure.
IK
CODE
Projection against mechanical impacts
IK CODE
00 No protection
01 – 05 Impact < 1 joule
06 Impact 1 joule
If hit with a hammer 500g from 20cm
07 Impact 2 joule
If hit with a hammer
500g from 40cm
08 Impact 5 joule
If hit with a hammer
1.7kg from 29.5cm
09 Impact 10 joule
If hit with a hammer
5kg from 20cm
10 Impact 20 joule
If hit with a hammer
5kg from 40cm

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