Hammond Manufacturing all products Industry Standards
www.hammfg.com
Standards Sources .....................................................................454
Industry Definitions (per NEMA) .................................................455
Industry Definitons (NEMA Standards) ...................................... 456
Enclosure Type - NEMA, UL, CSA Cross Reference .................. 459
Definition of Protection Grades IEC 529 ..................................... 460
Corrosion Information .................................................................462
Information Specific to Hammond Enclosures ............................ 463
Instructions for Repainting Hammond Enclosures .....................464
Decimal and Millimeter Equivalents ............................................ 465
Metric Conversion Information .................................................... 466
Corrosion Resistance Table ........................................................ 467
Technical Information
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www.nema.org
www.ul.com
www.csa.ca
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Standards Sources
NEMA National Electrical Manufacturers’ Association
1300 North 17th Street Rosslyn, VA 22209
•
NEMA Standards Publication No. 250 enclosures for Electrical Equipment (1000
•
Maximum)
NEMA Standards Publication No. ICS6 enclosures for Industrial Controls and
•
Systems
UL Underwriters’ Laboratories Inc.
333 Pfingsten Road, Northbrook, IL 60062
•
UL 50 Cabinets and Boxes
•
UL 508 Industrial Control Equipment
•
UL 870 Wireways, Auxiliary Gutter, and Associated Fittings
•
CSA CSA International
178 Rexdale Boulevard, Etobicoke (Toronto), Ontario, Canada M9W 1R3
•
CSA Standard C22.2, No 0 General Requirements - Canadian Electrical Code,
•
Part II
CSA Standard C22.2, No 0.4 Bonding and Grounding of Electrical Equipment
•
(Protective Equipment)
CSA Standard C22.2, No. 14 Industrial Control Equipment for Use in Ordinary
•
(Non-Hazardous) Locations
CSA Standard C22.2, No. 40 Cutout, Junction, and Pull Boxes
•
CSA Standard C22.2, No. 26 Construction and Test of Wireways, and Auxiliary
•
Gutters, and Associated Fittings.
CSA Standard C22.2, No. 94-M91 Special Purpose Enclosures
•
JIC Joint Industry Council
www.amtonline.org
Technical Information
EIA Electronic Industries Association
www.eia.org
IEC International Electrotechnical Commission
www.iec.ch
CE Conformite Europeene
www.cemarking.net
ANSI American National Standards Institute
www.ansi.org
c/o AMT - The Association for Manufacturing Engineering
7901 Westpark Drive, McLean, VA 22101
•
EMP-1 Electrical Standards for Mass Production Equipment
•
EGP-1 Electrical Standards for General Purpose Machine Tools
•
These standards have been replaced by NFPA-79
•
2500 Wilson Blvd, Arlington, VA 22201
•
EIA RS-310-D Cabinets, Racks, Panels, and Associated Equipment
•
3 Rue de Varemb, Geneva, Switzerland
•
•
IEC 60529 Classification of Degrees of Protection Provided by Enclosures
European Commission•
1819 L Street NW Washington, DC 20036•
454
Quality Enclosures. Service Excellence.
© Hammond Manufacturing Canada: 519.822.2960 or 905.456.3770 USA: 716.630.7030 Data Subject to change without notice
www.hammfg.com
Industry Definitions (per NEMA)
Introduction
An enclosure is a surrounding case constructed to provide a degree of protection to personnel against incidental contact with the enclosed
equipment and to provide a degree of protection to the enclosed equipment against specified environmental conditions. NEMA 250-2003.
General Definitions Pertaining To Enclosures
Cover: An unhinged portion of an enclosure that covers an
opening.
Indoor Locations are those areas, which are protected from
exposure to the weather. NEMA 250-2003.
Degree of Protection: The extent of protection provided by an
enclosure against access to hazardous parts, against ingress of
foreign solid objects and/or against ingress of water and verified by
standardized test methods.
Design Tests: Tests to demonstrate performance of a product
designed to applicable standards. (Note: Design tests are not
intended to be production tests.) NEMA 250-2003.
Door: A hinged portion of an enclosure that covers an opening.
NEMA 250-2003.
Hazardous (Classified) Locations are those areas, which may
contain hazardous (classified) materials in sufficient quantity to
create an explosion. See Article 500 of the National Electrical
Code. NEMA 250-2003.
Hazardous (Classified) Materials are those gases, vapors,
combustible dusts, fibers, or flyings, which are explosive under
certain conditions. NEMA 250-2003.
Hazardous Parts are parts that are hazardous to approach or
touch.
Knockout is a portion of the wall of an enclosure so fashioned that
it may be removed readily by a hammer, screwdriver, and pliers at
the time of installation in order to provide a hole for the attachment
of an auxiliary device or raceway, cable, or fitting. NEMA 250-2003.
Non-Hazardous Locations: Areas, which do not contain
hazardous (classified) materials in sufficient quantity to create an
explosion. NEMA 250-2003.
Non-Ventilated means constructed so as to provide no intentional
circulation of external air through the enclosure. NEMA 250-2003.
Oil-Resistant Gaskets are those made of material, which is
resistant to oil, or oil fumes. NEMA 250-2003.
Outdoor Locations are those areas, which are exposed to the
weather. NEMA 250-2003.
Ventilated means constructed so as to provide for the circulation of
external air through the enclosure to remove excess heat, fumes,
or vapors. NEMA 250-2003.
Technical Information
Quality Enclosures. Service Excellence.
© Hammond Manufacturing Canada: 519.822.2960 or 905.456.3770 USA: 716.630.7030 Data Subject to change without notice
455
Industry Definitons (NEMA Standards)
Definitions Pertaining to Non-Hazardous Locations
www.hammfg.com
Type 1 Enclosures are constructed for indoor use to provide a degree
of protection to personnel against access to hazardous parts and to
provide a degree of protection of the equipment inside the enclosure
against ingress of solid foreign objects (falling dirt)
Type 2 Enclosures are constructed for indoor use to provide a degree
of protection to personnel against access to hazardous parts, to
provide a degree of protection of the equipment inside the enclosure
against ingress of solid foreign objects (falling dirty, and to provide a
degree of protection with respect to harmful effects on the equipment
due to the ingress of water (dripping and light splashing).
Type 3 Enclosures are constructed for either indoor or outdoor use
to provide a degree of protection to personnel against access to
hazardous parts, to provide a degree of protection of the equipment
inside the enclosure against ingress of solid foreign objects (falling dirt)
and windblown dusty, to provide a degree of protection with respect
to harmful effects on the equipment due to the ingress of water (rain,
sleet, snow), and that will be undamaged by the external formation
of ice on the enclosure.
Type 3R Enclosures are constructed for either indoor or outdoor
use to provide a degree of protection to personnel against access to
hazardous parts, to provide a degree of protection of the equipment
inside the enclosure against ingress of solid foreign objects (falling dirt)
to provide a degree of protection with respect to harmful effects on the
equipment due to the ingress of water (rain, sleet, snow), and that will
be undamaged by the external formation of ice on the enclosure.
Type 3S Enclosures are constructed for either indoor or outdoor
use to provide a degree of protection to personnel against access to
hazardous parts, to provide a degree of protection of the equipment
inside the enclosure against ingress of solid foreign objects (falling dirt
and windblown dust) to provide a degree of protection with respect
to harmful effects on the equipment due to the ingress of water (rain,
sleet, snow), red for which the external mechanisms) remain operable
Technical Information
when ice laden.
Type 3X Enclosures are constructed for either indoor or outdoor
use to provide a degree of protection to personnel against access to
hazardous parts, to provide a degree of protection of the equipment
inside the enclosure against ingress of solid foreign objects (falling dirt)
and windblown dusty, to provide a degree of protection with respect
to harmful effects on the equipment due to the ingress of water (rain,
sleet, snow), that provides an additional level of protection against
corrosion and that will be undamaged by the external formation of
ice on the enclosure.
Type 3XR Enclosures are constructed for either indoor or outdoor
use to provide a degree of protection to personnel against access to
hazardous parts, to provide a degree of protection of the equipment
inside the enclosure against ingress of solid foreign objects (falling
dirt), to provide a degree of protection with respect to harmful effects
on the equipment due to the ingress of water (rain, sleet, snow), that
will be undamaged by the external formation of ice on the enclosure
that provides an additional level of protection against corrosion,
and that will be undamaged by the external formation of ice on the
enclosure.
Type 3SX Enclosures are constructed for either indoor or outdoor
use to provide a degree of protection to personnel against access to
hazardous parts, to provide a degree of protection of the equipment
inside the enclosure against ingress of solid foreign objects (falling dirt
and windblown dusty, to provide a degree of protection with respect
to harmful effects on the equipment due to the ingress of water (rain,
sleet, snowy, that provides an additional level of protection against
corrosion, and for which the external mechanisms) remain operable
when ice laden.
Type 4 Enclosures are constructed for either indoor or outdoor use
to provide a degree of protection to personnel against access to
hazardous parts, to provide a degree of protection of the equipment
inside the enclosure against ingress of solid foreign objects (falling dirt
and windblown dusty, to provide a degree of protection with respect
to harmful effects on the equipment due to the ingress of water (rain,
sleet, snow, splashing water, and hose directed water), and that will
be undamaged by the external formation of ice on the enclosure.
Type 4X Enclosures are constructed for either indoor or outdoor
use to provide a degree of protection to personnel against access to
hazardous parts, to provide a degree of protection of the equipment
inside the enclosure against ingress of solid foreign objects (windblown
dusty, to provide a degree of protection with respect to harmful effects
on the equipment due to the ingress of water (rain, sleet, snow,
splashing water, and hose directed water), that provides an additional
level of protection against corrosion, and that will be undamaged by
the external formation of ice on the enclosure.
Type 5 Enclosures are constructed for indoor use to provide a degree
of protection to personnel against access to hazardous parts, to
provide a degree of protection of the equipment inside the enclosure
against ingress of solid foreign objects (falling dirt and settling airborne
dust, lint, fibers, and flyings), and to provide a degree of protection
with respect to harmful effects on the equipment due to the ingress
of water (dripping and light splashing).
Type 6 Enclosures are constructed for either indoor or outdoor use
to provide a degree of protection to personnel against access to
hazardous parts, to provide a degree of protection of the equipment
inside the enclosure against ingress of solid foreign objects (falling
dirt), to provide a degree of protection with respect to harmful effects
on the equipment due to the ingress of water (hose directed water
and the entry of water during occasional temporary submersion at a
limited depths), and that will be undamaged by the external formation
of ice on the enclosure.
Type 6P Enclosures are constructed for either indoor or outdoor
use to provide a degree of protection to personnel against access to
hazardous parts, to provide a degree of protection of the equipment
inside the enclosure against ingress of solid foreign objects (falling
dirt), to provide a degree of protection with respect to harmful effects
on the equipment due to the ingress of water (hose directed water and
the entry of water during prolonged submersion at a limited depths),
that provides an additional level of protection against corrosion
and that will be undamaged by the external formation of ice on the
enclosure.
456
Quality Enclosures. Service Excellence.
© Hammond Manufacturing Canada: 519.822.2960 or 905.456.3770 USA: 716.630.7030 Data Subject to change without notice
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NEMA Enclosure Classifications
Definitions Pertaining to Non-Hazardous Locations - Cont'd
Type 12 Enclosures are constructed (without knockouts) for indoor use to provide a degree of protection to personnel against access to
hazardous parts, to provide a degree of protection of the equipment inside the enclosure against ingress of solid foreign objects (falling dirt
and circulating dust, lint, fibers, and flyings), and to provide a degree of protection with respect to harmful effects on the equipment due to the
ingress of water (dripping and light splashing).
Type 12K Enclosures are constructed (with knockouts) for indoor use to provide a degree of protection to personnel against access to
hazardous parts, to provide a degree of protection of the equipment inside the enclosure against ingress of solid foreign objects (failing dirt
and circulating dust, lint, fibers, and flyings), and to provide a degree of protection with respect to harmful effects on the equipment due to the
ingress of water (dripping and light splashing).
Type 13 Enclosures are constructed for indoor use to provide a degree of protection to personnel against access to hazardous parts, to provide
a degree of protection of the equipment inside the enclosure against ingress of solid foreign objects (falling dirt and circulating dust, lint, fibers,
and flyings), to provide a degree of protection with respect to harmful effects on the equipment due to the ingress of water (dripping and light
splashing), and to provide a degree of protection against the spraying, splashing, and seepage of oil and non-corrosive coolants.
Definitions Pertaining to Hazardous (Classified) Locations
Type 7 Enclosures constructed for indoor use in hazardous locations
classified as Class I, Division 1, Groups A, B, C, or D, as defined in
NFPA70. NEMA 250-2003.
Type 8 Enclosures constructed for either indoor or outdoor use in
hazardous locations classified as Class I, Division 1, Groups A, B,
C, or D, as defined in NFPA70. NEMA 250-2003.
Application for Enclosure Types
Type 1 general-purpose enclosures are suitable for general-purpose
application indoors, where atmospheric conditions are normal. These
enclosures serve as protection against falling dirt but are not dust
tight.
Type 2 drip-tight (indoor) enclosures are similar to Type 1 enclosures,
suitable for application where condensation may be severe, such as
that encountered in cooling rooms or laundries.
Type 3 enclosures provide proper protection against windblown
dust and weather hazards such as dirt, rain, sleet, or snow. They
are suitable for application outdoors on ship docks, canal locks,
construction work, and for application in subways and tunnels, use
indoors where dripping water is a problem.
Type 3R enclosures provide proper protection falling dirt, rain, sleet,
snow, undamaged by external formation of ice. They are suitable for
application outdoors, they will not withstand wind blown dust.
Type 4 watertight enclosures are suitable for dairies, breweries, etc.,
where the enclosure may be subjected to large amounts of water from
any angle. (They are not submersible).
Type 4X corrosion resistant enclosures satisfy the same requirements
of Type 4, in additi on, they are suit able for food processing
plants, dairies, refineries, and other industries where corrosion is
prominent.
Type 9 Enclosures constructed for indoor use in hazardous locations
classified as Class II, Division 1,Groups E, F, or G, as defined in
NFPA70. NEMA 250-2003.
Type 10 Enclosures constructed to meet the requirements of the
Mine Safety and Health Administration, 30 CFR, Part 18. NEMA
250-2003. NEMA 250-2003.
Type 6 submersible enclosures are suitable for application where the
equipment may be subject to occasional temporary submersion, such
as quarries, mines, and manholes. The enclosure design will depend
upon the specified conditions of pressure and time.
Type 9 hazardous location enclosures—Class II, Group E, F, or G.
These enclosures are designed to meet the requirements of the
“Canadian Electrical Code” Part I for Class II hazardous locations,
and CSA codes section 18, Class II, Group E, F, and G.
Class II, Group E
Class II, Group F — atmospheres containing carbon black, coal,
or coke dust
Class II, Group G — atmospheres containing flour, starch, or grain
dust
Type 12 industrial use enclosures protect against dripping and light
splashing of liquids. Hammond Type 12 enclosures meet JIC standard
and also satisfy requirements of NEMA.
Type 12K industrial use enclosure same as type 12 but includes
knockouts in the top and bottom end walls only.
Type 13 industrial use enclosures, protection against dust, spraying
of water, oil, and non-corrosive coolant. These enclosures are suitable
for application to machine tools and other industrial processing
machines.
— atmospheres containing metal dust
Technical Information
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© Hammond Manufacturing Canada: 519.822.2960 or 905.456.3770 USA: 716.630.7030 Data Subject to change without notice
457
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