47
Example: IP65 means that the equipment is dust – tight and protected against water jets.
In some countries, a third digit is used to describe the protection against mechanical impact:
Third digit
(as per NFC 20-010)
Third digit
(as per IEC529 –
BS EN 60529;1991)
Protection against
0 0 No protection
1 1 Impact < 0.225 J
2 2 Impact < 0,375 J
3 3 Impact < 0,5 J
4 – Not defined
5 4 Impact < 2,0 J
6 – Not defined
7 5 Impact < 6,0 J
8 – Not defined
9 6 Impact < 20 J
The IP Codes have their approximate equivalents – this is not a 1:1 correspondence!!! – in the
NEMA codes commonly used in the USA and Canada:
IP NEMA *)
23/30 *) 1
30/31 *) 2
32 3R
55 12
64 3
65 12K and 13
66 4 and 4X
67 6
*) different assignments, depending on source
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