Specifications

Chapter 14: Appendices
Appendix 10: NEMA/IP Enclosure Types
(12/99) 14-25
Tables 14-17 and 14-18 describe the features each enclosure is expected to have and
the tests applied to each.
NEMA Type Description Requirements/Design Tests
1 Indoor use primarily to provide a degree of protection against
limited amounts of falling dirt.
Rod Entry, Rust Resistance
2 Indoor use primarily to provide a degree of protection against
limited amounts of falling water and dirt.
Rod Entry, Rust Resistance, Drip
3 Outdoor use primarily to provide a degree of protection against
windblown dust, rain, sleet, and external ice formation.
Rain, Outdoor Dust, External Icing,
Corrosion Protection
3R Outdoor use primarily to provide a degree of protection against
falling rain, sleet, and external ice formation.
Rod Entry, Rain, External Icing, Corrosion
Protection
3S Outdoor use primarily to provide a degree of protection against
windblown dust, rain, sleet, and to provide for operation of external
mechanisms when ice laden.
Rain, Outdoor Dust, External Icing,
Corrosion Protection
4 Indoor or outdoor use primarily to provide a degree of protection
against windblown dust and rain, splashing water, hose-directed
water, and external ice formation.
External Icing, Hosedown, Corrosion
Protection
4X Indoor or outdoor use primarily to provide a degree of protection
against corrosion, windblown dust and rain, splashing water, hose-
directed water, and external ice formation.
External Icing, Hosedown, Corrosion
Protection
5 Indoor use primarily to provide a degree of protection against
settling airborne dust, falling dirt, and dripping noncorrosive liquids.
Drip, Settling Airborne Dust, Rust Resistance
6 Indoor or outdoor use primarily to provide a degree of protection
against hose-directed water, and the entry of water during
occasional temporary submersion at a limited depth.
Submersion, External Icing, Hosedown,
Corrosion Protection
6P Indoor or outdoor use primarily to provide a degree of protection
against hose-directed water, and the entry of water during
prolonged submersion at a limited depth.
Air Pressure, External Icing, Hosedown,
Corrosion Protection
12 Indoor use primarily to provide a degree of protection against
circulating dust, falling dirt, and dripping noncorrosive liquids.
Drip, Circulating Dust, Rust Resistance
12K Indoor use (with knockouts) primarily to provide a degree of
protection against circulating dust, falling dirt, and dripping
noncorrosive liquids other than at knockouts.
Drip, Circulating Dust, Rust Resistance
13 Indoor use primarily to provide a degree of protection against lint,
dust, spraying of water, oil, and noncorrosive coolant.
Rust Resistance, Oil Exclusion
Table 14-17: Nonhazardous Area Enclosures