Full Product Manual

23
NEMA, UL, and CSA Enclosure Classifications
NEMA, UL, and CSA are standard writing organizations commonly recognized in North America. Their ratings are based on similar application descriptions
and expected performance. UL and CSA both require enclosure testing by qualified evaluators. NEMA does not require independent testing and leaves
compliance completely up to the manufacturer. Below is a partial listing of the NEMA/UL/CSA.
Rating NEMA Standard 250 UL 50 CSA Standard C22.2 No 94
Type 1
Indoor use to provide a degree of protection against contact
with the enclosed equipment; in locations where unusual
service conditions do not exist.
Indoor use to provide a degree of protection against contact
with the enclosed equipment and against a limited amount
of falling dirt.
General purpose enclosure. Protects against accidental
contact with live parts.
Type 2
Indoor use to provide a degree of protection against contact
with the enclosed equipment and against limited amounts of
falling water and dirt.
Indoor use to provide a degree of protection against limited
amounts of falling water and dirt.
Drip proof enclosure same as Type 1; indoor use to provide a
degree of protection against dripping and light splashing of
non-corrosive liquids and falling dirt.
Type 3
Indoor or outdoor use to provide a degree of protection
against windblown dust, rain and sleet; undamaged by the
formation of ice on the enclosure (not sleet proof).
Indoor or outdoor use to provide a degree of protection
against windblown dust, rain and sleet; undamaged by the
formation of ice on the enclosure.
Indoor or outdoor use; provides a degree of protection
against rain, snow, and windblown dust; undamaged by the
external formation of ice on the enclosure.
Type 3R
Indoor or outdoor use to provide a degree of protection
against falling rain and sleet; undamaged by the formation
of ice on the enclosure.
Indoor or outdoor use to provide a degree of protection
against falling rain and sleet; undamaged by the formation of
ice on the enclosure.
Weather proof enclosure; indoor or outdoor use to provide a
degree of protection against rain or snow; undamaged by the
external formation of ice on the enclosure.
Type 3S
Indoor or outdoor use to provide a degree of protection
against falling dirt, rain, sleet, snow, and windblown dust;
and in which the external mechanism(s) remain operable
when ice laden.
Indoor or 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.
Weather proof enclosure; indoor or outdoor use to provide a
degree of protection against rain or snow; undamaged by the
external formation of ice on the enclosure surface.
Type 4
Indoor or outdoor use primarily to provide a degree of
protection against windblown dust and rain, splashing water,
and hose directed water; undamaged by the formation of ice
on the enclosure.
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.
Indoor or outdoor use; provides a degree of protection
against rain, snow, windblown dust, splashing and hose-
directed water; undamaged by the external formation of ice
on the enclosure.
Type 4X
Indoor or outdoor use primarily to provide a degree of
protection against corrosion, windblown dust and rain,
splashing water, and hose−directed water; undamaged by the
formation of ice on the enclosure.
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; resists
corrosion.
Indoor or outdoor use; provides a degree of protection
against rain, snow, windblown dust, splashing and hose-
directed water; undamaged by the external formation of ice
on the enclosure; resists corrosion.
Type 6
Indoor or outdoor use where occasional submersion is
encountered, limited depth; undamaged by the formation of
ice on the enclosure.
Indoor or outdoor use to provide a degree of protection
against entry of water during temporary submersion at a
limited depth; undamaged by the external formation of ice on
the enclosure.
Indoor or outdoor use; provides a degree of protection
against the entry of water during temporary submersion at a
limited depth. Undamaged by the external formation of ice on
the enclosure; resists corrosion.
Type 6P
Indoor or outdoor use to provide a degree of protection
against the entry of water during prolonged submersion at a
limited depth.
Indoor or outdoor use to provide a degree of protection
against the entry of water during prolonged submersion at a
limited depth.
No CSA equivalent.
Type 12
Indoor use to provide a degree of protection against dust,
falling dirt and dripping non-corrosive liquids - No knockouts.
Indoor use to provide a degree of protection against dust,
falling dirt and dripping non-corrosive liquids - No knockouts.
Indoor use to provide a degree of protection against
circulating dust, lint, fibers, dripping and light splashes of
non-corrosive liquids.
Type 12K
Enclosures with knockouts are intended for indoor use
primarily to provide a degree of protection against dust,
falling dirt, and dripping non-corrosive liquids.
Indoor use to provide a degree of protection against dust,
dirt, dripping water, and external condensation of
non-corrosive liquids. Knockouts located in the top or bottom
walls, or both.
Indoor use to provide a degree of protection against
circulating dust and lint; dripping and light splashing of
non-corrosive liquids; provided with knockouts.
Type 13
Indoor use to provide a degree of protection against lint,
dust, seepage, external condensation and spraying of water,
oil and non-corrosive coolant.
Indoor use to provide a degree of protection against dust
and spraying of water, oil and non-corrosive coolants.
Indoor use to provide a degree of protection against
circulating dust, lint, fibers, seepage and spraying of
non-corrosive liquids including oils and coolants.