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NEMA Enclosure Ratings |
| Air conditioners typically carry an agency marking such as UL (Underwriters Laboratories), which designates the environmental hazard from which the contents are being protected. This marking should be matched to the enclosure to be cooled. Typical examples include NEMA 12, (indoor use, protection from dust and dripping liquids), NEMA 3R, (outdoor use and rainproof) and NEMA 4/X (outdoor or indoor use, protection from wash-down and corrosive environments). |
Environments: |
NEMA 1 |
NEMA 3R |
NEMA 4 |
NEMA 4X |
NEMA 5 |
NEMA 6 |
NEMA 6P |
NEMA 12 |
NEMA 13 |
| Kooltronic Offers Solution* |
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| Indoor use only |
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| Indoor and outdoor use |
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| Falling liquids and light splashing |
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| Non-hazardous dust, lint, fibers |
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| Washdowns and splashing water |
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| Oil and coolant seepage |
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| Oil and coolant spraying and splashing |
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| Corrosive agents |
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| Occasional temporary submersion |
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| Occasional prolonged submersion |
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NEMA 7 and NEMA 9 enclosures are rated for hazardous locations; both are for indoor use. NEMA 7 enclosures are designed to contain an internal explosion without causing an external hazard. NEMA 9 enclosures are designed to prevent the ignition of combustible dust.
* Kooltronic’s custom design capabilities offer cooling solutions for situations that fall under these NEMA ratings. We can develop a unique design to meet your particular requirements. Consult with Kooltronic’s design and engineering staffs to discuss your heat dissipation problems. |
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