Appendix C
Enclosure Ratings
159
OMRON Testing Methods
Note 1. In additions to the following test for IP67 for Proximity Sensors, the detection distance and insulation
resistance performance were confirmed after 5 cycles of heat shock testing consisting of immersion in
0
°
C water for 1 hour and 70
°
C water for 1 hour.
2. Application conditions for the E2F Proximity Sensor: Natural conditions at 10 m or less under water as
follows: 1) No water immersion after 1 hour in water at 2 atmospheres and 2) the detection distance and
insulation resistance performance must be maintained after 20 repetitions of the above heat shock
cycle.
NEMA (National Electrical Manufacturers Association)
The following table from NEMA enclosure shows conversions to IEC60529. This table cannot be used in reverse.
NEMA250
IEC60529
NEMA250
IEC60529
1
IP10
4, 4X
IP56
2
IP11
5
IP52
3
IP54
6, 6P
IP67
3R
IP14
12, 12K
IP52
3S
IP54
13
IP54
Note From attachment A to NEMA standard 250. There are differences between the NEMA enclosure ratings
and IEC60529, including those in resistance to corrosion, resistance to rust, wettability, etc.
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