NEMA Enclosure Rating

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NEMA 1 (NEMA Standard 7-15-1991)
 
Type 1 enclosures are intended for indoor use primarily to provided a degree of protection against limited amounts of falling dirt.
 
  UL Type 1 (ANSI/UL50)  
 
Indoor use primarily to provide protection against contact with the enclosed
equipment and against a limited amount of falling dirt.
 
  Recommendation  
 
NEMA 1 / UL Type 1 enclosures should be applied to clean environments without circulating dust or other contaminants that may collect on surfaces. Equipment of this enclosure rating should be applied to clean electrical room or installed in another enclosure with a higher degree of protection. NEMA 1 / UL Type 1 enclosures typically are not recommended for installation on industrial factory floors.
 
 
NEMA 12 (NEMA Standard 7-15-1991)
 
Type 12 enclosures are intended for indoor use primarily to provide a degree of protection against circulating dust, falling dirt, and dripping non-corrosive liquids.
 
  UL Type 12 (ANSI/UL50)  
 
Indoor use to provide a degree of protection against dust, dirt, fiber flying's, dripping water, and external condensation of non-corrosive liquids.
 
  Recommendation  
 
NEMA 12 / UL Type 12 enclosures should be used in environments that contain
circulating dust or other contaminant particles. NEMA 12 / UL Type 12 enclosures are recommended for most applications on industrial factory floors where dust is present but spraying liquids are not.
 
 
Regular preventative maintenance of filter changing or cleaning is required. Inspect the enclosure and installed equipment for dust or particle build up that may limit cooling, clean as needed.
 
     


 

 

 

 

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