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IP CLASSIFICATIONS |
NEMA / UL
CLASSIFICATIONS |
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Ingress protection class of enclosures is according to
IEC 529 given in form of IP classification, a two digit coding which
is shown below |
NEMA performance criteria and test methods are used by
Underwriters Laboratories as guidelines for investigation and listing
of electrical enclosures. |
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First Digit |
Second digit |
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Protection against contact and ingress of solid objects |
Protection against ingress of water |
Approx. IP equivalents in red. |
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0 |
No special protection |
0 |
No special protection |
1
IP30 |
Indoor use primarily to provide a degree of protection
against contact with the enclosure equipment and against a limited
amount of falling dirt |
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1 |
Protected against ingress solid objects with a diameter
of more than 50 mm. No protection against deliberate access, e.g. with
a hand, but large surfaces of the body are prevented from approach |
1 |
Protection against dripping water falling vertically.
No harmful effect must be produced (vertically falling drops) |
2
IP31 |
Indoor use to provide a degree of protection against
limited amounts of falling water and dirt |
|
2 |
Protected against penetration by solid objects with a
diameter of more than 12 mm. Fingers or similar objects prevented from
approach |
2 |
Protection against dripping water falling vertically.
There must be no harmful effect when the equipment (enclosure) is
tilted at an angle up to 15° from its normal position (drops falling
at an angle). |
3
IP64 |
Outdoor use to provide a degree of protection against
windblown dust, rain and sleet; undamaged by the formation of ice on
the enclosure |
|
3 |
Protected against ingress of solid objects with a
diameter of more than 2.5 mm. Tools, wires etc. with a thickness of
more than 2.5 mm are prevented from approach |
3 |
Protection against water falling at any angle up to 60°
from the vertical. There must be no harmful effect (spray water). |
3R
IP32 |
Outdoor use to provide a degree of protection against
rain and sleet:; undamaged by the formation of ice on the enclosure |
|
4 |
Protected against ingress of solid objects with a
diameter of more than 1 mm. Tools, wires etc. with a thickness of more
than 1 mm are prevented from approach |
4 |
Protection against water splashed against the equipment
(enclosure) from any direction. There must be no harmful effect
(splashing water). |
4 (X)
IP66 |
Indoor or outdoor use to provide a degree of protection
against splashing water, windblown dust and rain, hose directed water;
undamaged by the formation of ice on the enclosure. (Resist
corrosion). |
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5 |
Protected against harmful dust deposits. Ingress of
dust is not totally prevented but the dust must not enter in
sufficient quantity to interface with satisfactory operation of the
equipment. Complete protection against contact. |
5 |
Protection against water projected from a nozzle
against the equipment (enclosure) from any direction. There must be no
harmful effect (water jet). |
12/12K
IP65 |
Indoor use to provide a degree of protection against
dust, falling dirt and dripping non corrosive liquids. |
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6 |
Protection against ingress of dust (dust tight).
Complete protection against contact. |
6 |
Protection against heavy seas or powerful water jets.
Water must not enter the equipment (enclosure) in harmful quantities
(splashing over). |
13
IP65 |
Indoor use to provide a degree of protection against
dust and spraying of water, oil and non corrosive coolants. |
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7 |
Protection against water when the equipment (enclosure)
is immersed in water under defined conditions of pressure and time.
Water must not enter in harmful quantities (immersion) |
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8 |
The equipment (enclosure) is suitable for continuous
submersion in water under conditions which must be specified by the
manufacturer (submersion). |
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