157
Appendix C
Enclosure Ratings
Protection Ratings
Note International protection degrees are determined by the following tests. Be sure to check the sealing capabil-
ity under the actual operating environment and conditions before actual use.
IEC (International Electrotechnical Commission) Standards (IEC 60529
January 1997)
IP-
jj
Degree of protection against water
Degree of protection against solid materials
International protection mark
Degree
Protection
0
No protection
1
50 mm dia.
Protects against penetration of any solid object, such as a hand, that is 50 mm or
more in diameter.
2
12.5 mm dia.
Protects against penetration of any solid object, such as a finger, that is 12.5 mm
or more in diameter.
3
2.5 mm
Protects against penetration of any solid object, such as a wire, that is 2.5 mm or
more is diameter.
4
1 mm
Protects against penetration of any solid object, such as a wire, that is 1 mm or
more in diameter.
5
Protects against penetration of dust of a quantity that may cause malfunction or
obstruct the safe operation of the product.
6
Protects against penetration of all dust.
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