Copper/Brass Air Conditioners & Coolers for Electrical Enclosures

1 is a safety rating for indoor electrical enclosures with nongasketed doors that specifies a degree of protection against incidental contact and against the entry of solid objects such as falling dirt
3R is a safety rating for indoor and outdoor electrical enclosures–often called rain tight or rain proof–that specifies a degree of protection against incidental contact, against the entry of solid objects (falling dirt) or water (rain, snow), and against exterior ice formation
4 is a safety rating for indoor and outdoor electrical enclosures with gasketed doors that specifies a degree of protection against incidental contact, against the entry of solid objects (falling dirt, windblown dust) or water (snow, rain, water splashes and sprays), against occasional washdowns, and against exterior ice formation.
4X is a safety rating for indoor and outdoor electrical enclosures – also known as washdown enclosures – that specifies a degree of protection against incidental contact, against the entry of solid objects (falling dirt, windblown dust) or water (rain, snow, water splashes and sprays), against corrosion, and against exterior ice formation.
12 is a safety rating for indoor electrical enclosures that specifies a degree of protection against incidental contact and the entry of solid objects (falling dirt, circulating dust/lint) or water (dripping, light splashing).

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