New! - Norman Equipment Co.

TypeDesignation420123NEMA, UL, CSA & IECINGRESS PROTECTION RATINGSTABLE 1, NEMA, UL and CSA Enclosure Ratings3R44X61213NEMAENCLOSURE TYPES FOR NON-HAZARDOUS LOCATIONSNational Electrical ManufacturersAssociation (NEMA Standard 250)and Electrical and ElectronicManufacturers Association of Canada (EEMAC)Enclosures are intended for outdoor use primarily toprovide a degree of protection against contact withthe enclosed equipment or location where unusualservice conditions do not exist.Enclosures are intended for indoor use primarily toprovide a degree of protection against limitedamounts of falling water and dirt.Enclosures are intended for outdoor use primarily toprovide a degree of protection against windblowndust, rain, and sleet; undamaged by the formation ofice on the enclosure.Enclosures are intended for outdoor use primarily toprovide a degree of protection against falling rain andsleet; undamaged by the formation of ice on theenclosure.Enclosures are intended for indoor or outdoor use primarilyto provide a degree of protection against windblowndust and rain, splashing water, and hosedirectedwater; undamaged by the formation of ice onthe enclosure.Enclosures are intended for indoor or outdoor use primarilyto provide a degree of protection against corrosion,windblown dust and rain, splashing water, andhose-directed water; undamaged by the formation ofice on the enclosure.Enclosures are intended for use indoors or outdoorswhere occasional submersion is encountered.Enclosures are intended for use indoors or outdoorswhere occasional submersion is encountered.Enclosures are intended for indoor use primarily toprovide a degree of protection against dust, sprayingof water, oil, and non-corrosive coolant.This material is reproduced with permission fromNEMA. The preceding descriptions, however, are notintended to be complete representations of NationalElectrical Manufacturers Association standards forenclosures nor those of the Electrical and ElectronicManufacturers Association of Canada.NEMA, UL, CSA and IEC have each established ratingssystems intended to identify an enclosure’s ability to repelelements from the outside environment. These rating systemsaddress the enclosure’s ability to protect against avariety of environmental conditions. These include:• Incidental contact• Rain, sleet and snow• Windblown dust• Hosedown and splashing liquids• Falling dirt• Oil or coolant spraying/splashing• Corrosive agents• Occasional temporary submersion• Occasional prolonged submersionUnderwriters Laboratories Inc.(UL 50 and UL 508)Indoor use primarily to provide protection againstcontact with the enclosed equipment and against alimited amount of falling dirt.Indoor use to provide a degree of protection againstlimited amounts of falling water and dirt.Outdoor use to provide a degree of protection againstwindblown dust and windblown rain; undamaged bythe formation of ice on the enclosure.Outdoor use to provide a degree of protection againstfalling rain; undamaged by the formation of ice on theenclosure.Either indoor or outdoor use to provide a degree ofprotection against falling rain, splashing water, andhose-directed water; undamaged by the formation ofice on the enclosure.Either indoor or outdoor use to provide a degree ofprotection against falling rain, splashing water, andhose-directed water; undamaged by the formation ofice on the enclosure; resists corrosion.Indoor or outdoor use to provide a degree of protectionagainst entry of water during temporary submersionat a limited depth; undamaged by the formationof ice on the enclosure.Indoor use to provide a degree of protection againstdust, dirt, fiber flyings, dripping water, and externalcondensation of non-corrosive liquids.Indoor use to provide a degree of protection againstlint, dust seepage, external condensation and sprayingof water, oil, and non-corrosive liquids.This material is reproduced with permission fromUnderwriters Laboratories Inc. Standard for Safety forCabinets and Boxes, UL 50, Copyright 1985 andIndustrial Control Equipment, UL 508, Copyright 1984by Underwriters Laboratories Inc.Underwriters Laboratories Inc. (UL) shall not beresponsible to anyone for the use of or reliance upona UL Standard by anyone. UL shall not incur any obligationor liability for damages, including consequentialdamages, arising out of or in connection with theuse, interpretation of, or reliance upon a ULStandard.Canadian Standards Association(Standard C22.2 No. 94)General purpose enclosure. Protects against accidentalcontact with parts.Indoor use to provide a degree of protection againstdripping and light splashing of noncorrosive liquidsand falling dirt.Indoor or outdoor use; provides a degree ofprotection against rain, snow, and windblown dust;undamaged by the external formation of ice on theenclosure.Indoor or outdoor use; provides a degree of protectionagainst rain and snow; undamaged by the externalformation of ice on the enclosure.Indoor or outdoor use; provides a degree of protectionagainst rain, snow, windblown dust, splashingand hose-directed water; undamaged by the externalformation of ice on the enclosure.Indoor or outdoor use; provides a degree of protectionagainst rain, snow, windblown dust, splashingand hose-directed water; undamaged by the externalformation of ice on the enclosure; resists corrosion.Indoor or outdoor use; provides a degree of protectionagainst the entry of water during temporary submersionat a limited depth; undamaged by the externalformation of ice on the enclosure; resists corrosion.Indoor use; provides a degree of protection againstcirculating dust, lint, fibers, and flyings; dripping andlight splashing of non-corrosive liquids; not providedwith knockouts.Indoor use; provides a degree of protection againstcirculating dust, lint, fibers, and flyings; seepage andspraying of non-corrosive liquids, including oils andcoolants.This material is reproduced with permission from theCanadian Standards Association.While these ratings are intended to help you make amore informed product selection, there are some differencesbetween each organization’s system.As shown in Table 1, the NEMA, UL and CSA ratingsmost commonly used in North America are based on similarapplication descriptions and expected performance.However, while UL and CSA require testing in the laboratories(and periodic manufacturer site inspections toensure continued adherence to prescribed standards),NEMA leaves compliance and certification up to the manufacturer.While the European IEC (IP) ratings summarized inTable 2 are based on similar test methods, their performancehas some slight and subtle differences in interpretation.For example, selected IP ratings permit limited