Comparison of Specific Applications of Enclosures for indoor Locations

**These fibers and flyings are not considered Class lll type ignitable fibers or combustible flyings.

Comparison of Specific Applications of Enclosures for indoor & Outdoor Locations

**External operating mechanisms are not required to be operable when the enclosure is ice covered.

***External operating mechanisms are operable when the enclosure is ice covered.

****These fibers and flyings are not considered Class III type ignitable fibers or combustible flyings.

Environmental conditions corresponding to the protection levels of NEMA motors:

• NEMA-1

  Enclosures constructed for indoor use to provide a degree of protection to personnelagainst access to hazardous parts and to provide a degree of protection of the equipmentinside the enclosure against ingress of solid foreign objects (falling dirt).

• NEMA-2

  Enclosures constructed for indoor use to provide a degree of protection to personnelagainst access to hazardous parts; to provide a degree of protection of the equipmentinside the enclosure against ingress of solid foreign objects (falling dirt); and, to provide adegree of protection with respect to harmful effects on the equipment due to the ingress ofwater (dripping and light splashing).

• NEMA-3

  Enclosures constructed for either indoor or outdoor use to provide a degree of protection topersonnel against access to hazardous parts; to provide a degree of protection of theequipment inside the enclosure against ingress of solid foreign objects (falling dirt andwindblown dust); to provide a degree of protection with respect to harmful effects on theequipment due to the ingress of water (rain, sleet, snow); and, that will be undamaged bythe external formation of ice on the enclosure.

• NEMA-3R

  Enclosures constructed for either indoor or outdoor use to provide a degree of protection topersonnel against access to hazardous parts; to provide a degree of protection of theequipment inside the enclosure against ingress of solid foreign objects (falling dirt); toprovide a degree of protection with respect to harmful effects on the equipment due to theingress of water (rain, sleet, snow); and, that will be undamaged by the external formationof ice on the enclosure.

• NEMA-3S

  Enclosures constructed for either indoor or outdoor use to provide a degree of protection topersonnel against access to hazardous parts; to provide a degree of protection of theequipment inside the enclosure against ingress of solid foreign objects (falling dirt andwindblown dust); to provide a degree of protection with respect to harmful effects on theequipment due to the ingress of water (rain, sleet, snow); and, for which the externalmechanism(s)remain operable when ice-laden.

• NEMA-3X

  Enclosures constructed for either indoor or outdoor use to provide a degree of protection topersonnel against access to hazardous parts; to provide a degree of protection of theequipment inside the enclosure against ingress of solid foreign objects (falling dirt andwindblown dust); to provide a degree of protection with respect to harmful effects on theequipment due to the ingress of water (rain, sleet, snow); that provides an increased levelof protection against corrosion and that will be undamaged by the external formation of iceon the enclosure.

• NEMA-3RX

  Enclosures constructed for either indoor or outdoor use to provide a degree of protection topersonnel against access to hazardous parts; to provide a degree of protection of theequipment inside the enclosure against ingress of solid foreign objects (falling dirt); toprovide a degree of protection with respect to harmful effects on the equipment due to theingress of water (rain, sleet, snow); that will be undamaged by the exteral formation of iceon the enclosure that provides an increased level of protection against corrosion.

• NEMA-3SX

  Enclosures constructed for either indoor or outdoor use to provide a degree of protection topersonnel against access to hazardous parts; to provide a degree of protection of theequipment inside the enclosure against ingress of solid foreign objects (falling dirt andwindblown dust); to provide a degree of protection with respect to harmful effects on theequipment due to the ingress of water (rain, sleet, snow); that provides an increased levelof protection against corrosion; and for which the external mechanism(s) remain operablewhen ice-laden.

• NEMA-4

  Enclosures constructed for either indoor or outdoor use to provide a degree of protection topersonnel against access to hazardous parts; to provide a degree of protection of theequipment inside the enclosure against ingress of solid foreign objects (falling dirt andwindblown dust); to provide a degree of protection with respect to harmful effects on theequipment due to the ingress of water (rain, sleet, snow, splashing water, and hosedirected water); and, that will be undamaged by the external formation of ice on theenclosure.

• NEMA-4X

  Enclosures constructed for either indoor or outdoor use to provide a degree of protection topersonnel against access to hazardous parts; to provide a degree of protection of theequipment inside the enclosure against ingress of solid foreign objects (falling dirt andwindblown dust); to provide a degree of protection with respect to harmful effects on theequipment due to the ingress of water (rain, sleet, snow, splashing water, and hosedirected water); that provides an increased level of protection against corrosion; and thatwill be undamaged by the external formation of ice on the enclosure.

• NEMA-5

  Enclosures constructed for indoor use to provide a degree of protection to personnelagainst access to hazardous parts; to provide a degree of protection of the equipmentinside the enclosure against ingress of solid foreign objects (falling dirt and settling dust.lint, fibers, and flyings); and, to provide a degree of protection with respect to harmfuleffects on the equipment due to the ingress of water (dripping and light splashing).

• NEMA-6

  Enclosures constructed for either indoor or outdoor use to provide a degree of protection topersonnel against access to hazardous parts; to provide a degree of protection of theequipment inside the enclosure against ingress of solid foreign objects (falling dirt); toprovide a degree of protection with respect to harmful effects on the equipment due to theingress of water (hose directed water and the entry of water during occasional temporarysubmersion at a limited depth); and, that will be undamaged by the external formation of iceon the enclosure.

• NEMA-6P

  Enclosures constructed for either indoor or outdoor use to provide a degree of protection topersonnel against access to hazardous parts; to provide a degree of protection of theequipment inside the enclosure against ingress of solid foreign objects (falling dirt); toprovide a degree of protection with respect to harmful effects on the equipment due to theingress of water (hose directed water and the entry of water during prolonged submersionat a limited depth); that provides an increased level of protection against corrosion and thatwill be undamaged by the external formation of ice on the enclosure.

• NEMA-12

  Enclosures constructed (without knockouts) for indoor use to provide a degree of protectionto personnel against access to hazardous parts; to provide a degree of protection of theequipment inside the enclosure against ingress of solid foreign objects (falling dirt andcirculating dust, lint, fibers, and filyings); to provide a degree of protection with respect toharmful effects on the equipment due to the ingress of water (dripping and light splashing)and to provide a degree of protection against light splashing and seepage of oil and non-corrosive coolants.

• NEMA-12K

  Enclosures constructed (with knockouts) for indoor use to provide a degree of protection topersonnel against access to hazardous parts; to provide a degree of protection of theequipment inside the enclosure against ingress of solid foreign objects (falling dirt andcirculating dust, lint, fibers, and flyings); and, to provide a degree of protection with respectto harmful effects on the equipment due to the ingress of water (dripping and lightsplashing) and to provide a degree of protection against light splashing and seepage of oiland non-corrosive coolants.

• NAME-13

  Enclosures constructed for indoor use to provide a degree of protection to personnelagainst access to hazardous parts; to provide a degree of protection of the equipmentinside the enclosure against ingress of solid foreign objects (faling dirt and circulating dust,lint, fibers, and flyings); to provide a degree of protection with respect to harmful effects onthe equipment due to the ingress of water (dripping and light splashing): and, to provide adegree of protection against the spraying, splashing, and seepage of oil and non-corrosivecoolants.

• NAME-7

  Explosion-proof enclosures demonstrating compliance with the requirements of ANS//UL1203 for use in hazardous (classified) locations classified as Class l, Division 1, Groups AB, C, or D as defined in ANSI/NFPA 70.

• NEMA-9

  Dust-ignition-proof enclosures demonstrating compliance with the requirements of ANS/UL1203 for use in hazardous (classified) locations classified as Class ll, Division 1, Groups EF, or G as defined in ANSI/NFPA 70.

Conversion of NEMA Enclosure Type Ratings to ANSI/IEC 60529 Enclosure Classification Designations (IP)

A = A shaded block in the "A" column indicates that the NEMA Enclosure Type exceeds the requlrements for the respective ANS/IEC 60529 IP First Character Desianation, The IP First Character Desiqnation is the protection against access to hazardous parts and solid foreign obiects

B = A shaded block in the "B" column indicates that the NEMA Enclosure Type exceeds the requirements for the respective ANS/IEC 60529 IP Second Character Desianation, The IP Second Character Designation is the protection against the ingress of water.