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Definitions Pertaining to Non-hazardous
Locations
Type 1 Enclosures
Intended for use primarily to provide a degree of protection
against limited amounts of falling dirt.
Type 3 Enclosures
Intended for outdoor use primarily to provide a degree
of protection against rain, sleet, windblown dust, and
damage from external ice formation.
Type 3R Enclosures
Intended for outdoor use primarily to provide a degree
of protection against rain, sleet, and damage from external
ice formation.
Type 3S Enclosures
Intended for outdoor use primarily to provide a degree
of protection against rain, sleet, windblown dust, and
to provide for operation of external mechanisms when
ice laden.
Type 4 Enclosures
Intended for indoor or outdoor use primarily to provide
a degree of protection against windblown dust and rain,
splashing water, hose-directed water, and damage from
external ice formation.
Type 4X Enclosures
Intended for indoor or outdoor use primarily to provide
a degree of protection against corrosion, windblown
dust and rain, splashing water, hose-directed water,
and damage from ice formation
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Definitions Pertaining to Hazardous
(Classified) Locations
Type 7 Enclosures
Intended for indoor use in locations classified as Class
I, Groups A, B, C, or D, as defined in the National
Electrical Code.
Type 8 Enclosures
Intended for indoor or outdoor use in locations classified
as Class I, Groups A, B, C, or D, as defined in
the National Electrical Code.
Type 9 Enclosures
Intended for indoor use in locations classified as Class
II, Groups E, F, or G, as defined in the National
Electrical Code.
Type 10 Enclosures
Constructed to meet the applicable requirements of the
Mine Safety and Health Administration.
IP Data
Ingress Protection (IP), as stated by I.E.C. Standard
529, describes the degree of protection an enclosure
provides. The first digit of the IP designation describes
the degree of protection against access to hazardous
parts and ingress of solid objects; the second digit
designates the Ingress Protection against water. Please
refer to the appropriate sections of IEC 529 for complete
information regarding applications, features, and design
tests.
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Type 6 Enclosures
Intended for indoor or outdoor use primarily to provide
a degree of protection against hose-directed water,
the entry of water during occasional temporary submersion
at a limited depth, and damage from external ice formation.
Type 6P Enclosures
Intended for indoor or outdoor use primarily to provide
a degree of protection against hose-directed water,
the entry of water during prolonged submersion at a
limited depth, and damage from external ice formation.
Type 12 Enclosures
Intended for indoor use primarily to provide a degree
of protection against circulating dust, falling dirt,
and dripping non-corrosive liquids.
Type 12K Enclosures
Type 12 with knockouts.
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