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1st CHARACTERISTIC
DIGIT:
Protection against the
entry of foreign objects and against access to dangerous parts.
| Meaning |
Protection
of the
anclosure against
the entry of |
Means
of test |
Protection
of
person against
access with |
Means
of test |
| 0 |
|
|
|
|
| 1 |
Solid
objects
with dimensions
greater than Ø 50 mm |
 |
back
of hand |
accessibility gauge Ø 50 mm |
| 2 |
Solid
objects
with dimensions
greater than Ø 12,5 mm |
 |
finger |
articulated test finger |
| 3 |
Solid
objects
with dimensions
greater than Ø 2,5 mm |
 |
tool |
accessibility gauge Ø 2,5 mm |
| 4 |
Solid
objects
with dimensions
greater than Ø 1mm |
 |
wire |
accessibility gauge Ø 1 mm |
| 5 |
Harmful
amount of dust Talcum powder |
 |
| 6 |
Dust
(totally protected) Talcum powder |
 |
2nd
CHARACTERISTIC DIGIT:
Protection against the infiltration of water.
ADDITIONAL
LETTERS
| Meaning |
Protection
of person against access with |
Means
of test |
| A |
Back
of hand |
accessibility gauge Ø 50 mm |
| B |
Finger |
articulated test finger |
| C |
Tool |
accessibility gauge Ø 2,5 mm X 100mm |
| D |
Wire |
accessibility gauge Ø 1 mm X 100mm |
SUPPLEMENTARY
LETTERS
| Supplementary
informations for the protection of material |
| H |
High
voltage devices |
| M |
Tested
against the harmful effects of water infiltration when the
mobile parts of the device are moving |
| S |
Tested
against the harmful effects of water infiltration when the
mobile parts of the device are not moving |
| W |
Suitable
for use in specified atmospheric condorions and provided
with additional measures and procedures |
Used
only if:
-
the
effective protection against access to dangerous parts is
greater than the one indicated by the first characteristic
digit.
-
only
the protection against access to dangerous parts is indicated
and the first characteristic digit is the replaced by an X.
EXMPLE OF FULL APPLICATION OF THE IP CODE:
| IP |
3 |
4 |
D |
W |
| |
Protected
against the entry of solid objects larger than 2,5 mm |
Protected
against the effects of splasching water |
Protected
against access with a wire |
Suitable
for use in specified atmospheric conditions |
Remarks
The
degree of protection IP must always be read digit by digit and
not as a whole. For example, an enclosure with a degree of
protection IP 31 is suitable for an environment that requires
at least a degree of protection IP 21. In this case a device with
degree of protection IP 30 cannot be used.
Considering
the fact that the presence of water on devices (panels) has in
any event a negative effect (infiltration, corrosion, etc.), it
will be advisable that all devices installed outdoor be fitted
with a protective roof, and possibly with side screens.
The
degree of protection indicated by the manufacturer is in general
applicable to the conditions indicated in the catalogue.
However,
only adequate assembly, installation and maintenance will guarantee
the original degree of protection.
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