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Technical
459
IP Ratings in Damp Areas
Ingress protection ratings (IP)
The resistive performance of fittings to solids and liquids is indicated by the
IP (Ingress Protection) prefix followed by two numbers.
The first number indicates the measure of protection against the ingress of solids. For instance:
The second number indicates the measure of protection against the ingress of liquids. For instance:
Ingress Protection (IP) Specification Guide
Protection against the ingress of solid objects IP.1X
Protection against the ingress of liquids IP.X1
IP
No.
Example
Protection
against
contact and
ingress of
objects
Tests
Symbol
IP
No.
Example
Protection
against
contact and
ingress of
water
Tests
Symbol
50
Protected
against solid
objects greater
than 50mm ø
A large surface of the
body, such as a hand
(but no protection
against deliberate
access). Solid objects
exceeding 50 mm in
diameter.
Protected
against
dripping
water
Dripping water (vertically falling
drops) shall have no harmful effect
12.5
Protected
against solid
objects greater
than 12mm ø
Fingers or similar
objects not exceeding
80 mm in length.
Solid objects exceeding
12mm in diameter.
15°
Protected
against
dripping
water when
tilted up to
15°
Vertically dripping water shall
have no harmful effect when the
enclosure is tilted at any angle up
to 15° from its normal position
Protected
against solid
objects greater
than 2.5mm ø
Tools, wires, etc.,
of diameter or
thickness greater than
2.5mm. Solid objects
exceeding 2.5mm in
diameter.
60°
Protected
against
spraying
water
Water falling as a spray at an
angle up to 60° from the vertical
shall have no harmful effect
Protected
against solid
objects greater
than 1.0mm ø
Wires or strips of
thickness greater than
1.0mm. Solid objects
exceeding 1.0 mm
in diameter.
Protected
against
splashing
water
Water splashed against the
enclosure from any direction hall
have no harmful effect
Dust protected Ingress of dust is not
totally prevented but
dust does not enter
in sufficient quantity
to interfere with
satisfactory operation
of the equipment.
Ø6.3
Protected
against
water jets
Water projected by a nozzle
against the enclosure from any
direction shall have no harmful
effect
Dust tight
No ingress of dust.
Ø12.5
Protected
against
heavy seas
Water from heavy seas or water
projected in powerful jets shall
not enter the enclosure in harmful
quantities
15cm
1m
Protected
against the
effects of
immersion
Ingress of water in a harmful
quantity shall not be possible when
the enclosure is immersed in water
under defined conditions of pressure
and time
m
Protected
against
submersion
The equipment is suitable for
continuous submersion in water
under conditions which shall be
specified by the manufacturer.
NOTE Normally, this will mean that
the equipment is hermetically sealed.
However, with certain types of
equipment, it can mean that water
can enter but only in such a manner
that it produces no harmful effects.
23
68
67
23
65
44
44