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This classification is defined by the American National Electrical
Manufacturers Association (NEMA) that have
specified standards for different types of electrical enclosures typically used in
industrial applications. The different ratings under the NEMA system refer to protection
against personal access to parts that may be dangerous to operators.
to the NEMA website, classification ”NEMA 4” is defined as the following:
”Enclosures constructed for either indoor or
outdoor use to provide a degree of protection to personnel against access to hazardous
parts; to provide a degree of protection of the equipment inside the enclosure against
ingress of solid foreign objects (falling dirt and windblown dust); to provide
a degree of protection with respect to harmful
effects on the equipment due to the ingress of water (rain, sleet, snow, splashing
water, and hose directed water); and that will be undamaged by the external formation
of ice on the enclosure. ”
The ”NEMA 4”-standard requires several testing procedures
and Industrilas has tested several products in regards to water ingress. These
products - and the products manufactured in the same way and those have the
same geometry are concidered to fulfil the NEMA 4-classification. They are classified
according to the water-test in the NEMA 4 testing procedure. This exceeds IEC
The products on the following catalogue pages are concidered
to be waterproof according to the tests in NEMA 4 and these product pages are marked with this icon for clarity.
The following pages have products waterproof according to NEMA 4:
6-152, 6-160 and 6-162.