Fabricated form carbon steel,  NEMA 3R rating is specified for outdoor use, primarily to provide a degree of protection against falling rain or sleet; and to be undamaged by the formation of ice on the enclosure. Type 3R NEMA enclosures provide protection in outdoor applications against rain, sleet and snow, or indoors against dripping water. This style of electrical enclosure can be used as a wiring box, junction box or pull box in commercial and general industrial applications requiring an industrial cabinet or NEMA enclosure.