| Type |
Description |
|
|
| Type
1 |
General
purpose enclosures are suitable for general
purpose application indoors, where atmospheric
conditions are normal. These enclosures serve
as protection against falling dust, but are
not dust tight. |
|
|
| Type
2 |
Driptight
(indoor) eneclosures are similar to NEMA 1
enclosures, with the addition for drip shields,
and are suitable for application where condensation
may be severe, such as that encountered in
cooling rooms or laundries. |
|
|
| Type
3 |
Dust,
rain proof and sleet resistant enclosures
provide proper protection against windblown
dust and weather hazards such as rain, sleet
or snow. They are suitable for applications
outdoors on ship docks, canal locks, construction
work, and for applications in subways and
tunnels; use indoors where dripping water
is a problem. |
|
|
| Type
3R |
Dust,
rain proof and sleet resistant enclosures
provide proper protection against falling
dirt and weather hazards such as rain, sleet
or snow. They are suitable for applications
outdoors on ship docks, canal locks, construction
work, and for applications in subways and
tunnels; use indoors where dripping water
is a problem. |
|
|
| Type
4 |
Water
tight 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 |
Corroison
resistant enclosures satisfy the same requirements
as NEMA 4; in addition they are suitable for
food processing plants, dairies, refineries,
and other industries where corrosion is prominent. |
|
|
| Type
6 |
Submersible
enclosures are suitable for application where
the equipment may be subject to 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 ClassII hazardous locations,
and CSA codes section 18 Class II Group E,f,
and G.
Class II Group E - atmosphere containing metal
dust
Class II Group F - atmosphere containing carbon
black, coal, or coke dust.
Class II Group G - atmosphere containing flour,
starch or grain dust. |
|
|
| Type
12 |
Industrial
use enclosures are oil tight. Hammond
type 12 enclosures meet JIC standard and also
satisfy requirements of NEMA. |
|
|
| Type
13 |
The
cover is held in place with screws, bolts
or other suitable fasteners, with a continous
gasket construction. The fastener parts are
held captive when the door is opened. There
are no holes through the enclosures for mounting
or attaching controls inside the enclosure,
and no conduit knock-outs or openings. Mounting
feet, brackets, or other mounting means are
provided. These enclosures are suitable for
application to machine tools and other industrial
processing machines where oil, coolants, water,
filings, dust or lint may eneter, seep into
or infiltrate the enclosure through mounting
holes, unused conduit knock-outs, or holes
used for mounting equipment with the enclosure. |
The
preceding descriptions are not intended to be
complete representations
of the National Electrical Manufacturers Association
standards for enclosures.
Underwriter
Laboratories Inc. (UL 50 and UL 508)
| Type
1 |
Indoor
use primarily to provide protection against
contact with the enclosed equipment and against
limited amount of falling dirt. |
|
|
| Type
2 |
Indoor
use to provide a degree of protection against
limited amounts of falling water and dirt. |
|
|
| Type
3 |
Outdoor
use to provide a degree of protection against
windblown dust and windblown
rain; undamaged by the formation of ice on
the enclosure. |
|
|
| Type
3R |
Outdoor
use to provide a degree of protection against
falling rain; undamaged by the formation
of ice on the enclosure.
|
|
|
| Type
4 |
Either
indoor or outdoor use to provide a degree
of protection against falling rain, splashing
water, and hose-directed water; undamaged
by the formation of ice on the enclosure. |
|
|
| Type
4X |
Same
as type 4 except this one is corrosion
resistant. |
|
|
| Type
6 |
Indoor
or outdoor use to provide a degree of protection
against entry of water during temporary submersion
at a limited depth; undamaged by formation
of ice on the enclosure. |
|
|
| Type
12 |
Indoor
use to provide a degree of protection against
dust, dirt, fiber flyings, dripping water,
and external condensation of noncorrosive
liquids. |
|
|
| Type
13 |
Indoor
use to provide a degree of protection against
lint, dust seepage, external condensation
and spraying of water, oil, and noncorrosive
liquids. |
|
