Disconnect Switch Enclosure Hubs

3R this 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, windblown dust) or water (rain, snow), and against exterior ice formation.
4 this 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 (rain, snow, water splashes and sprays), against occasional washdowns, and against exterior ice formation.
4X this 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.
5 this 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, settling dust/lint) or water (dripping, light splashing).
12 this is a safety rating for indoor electrical enclosures that specifies a degree of protection against incidental contact and against the entry of solid objects (falling dirt, circulating dust/lint) or water (dripping, light splashing).
12K this is a safety rating for indoor electrical enclosures with knockouts and sealed, gasketed doors – often called dustproof or dust-tight – that specifies a degree of protection against incidental contact and against the entry of solid objects (falling dirt, circulating dust) or water (drips, light splashes).

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