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INGRESS PROTECTION
INGRESS PROTECTION (IP) RATINGS
Class
Symbol
Description
IP20
Solid bodies larger than 12mm diameter
IP23
Solid bodies larger than 12mm diameter. Rainfall
IP40
Solid bodies larger than 1mm diameter
IP43
Solid bodies larger than 1mm diameter. Rainfall
IP44
Solid bodies larger than 1mm diameter. Protection from splashed water
IP54
Partial protection from dust. Protection from splashed water
IP55
Partial protection from dust. Protection from water sprayed from a nozzle - all directions
IP65
Sealed against dust. Protection from water sprayed from a nozzle - all directions
IP68
Sealed against dust. Protection against complete, continuous submersion in water
S
S
S S
S S
S
S
SS
EN 60529 outlines an international classification system for the sealing effectiveness of enclosures of electrical equipment against the
intrusion into the equipment of foreign bodies (i.e. tools, dust, fingers) and moisture. This classification system utilizes the letters “IP”
(“Ingress Protection”) followed by two or three digits. (A third digit is sometimes used. An “x” is used for one of the digits if there is only
one class of protection; i.e. IPX4 which addresses moisture resistance only.)
Degrees of Protection - First Digit
The first digit of the IP code indicates the degree that persons are protected against contact with moving parts (other than smooth
rotating shafts, etc.) and the degree that equipment is protected against solid foreign bodies intruding into an enclosure.
0
No special protection
1
Protection from a large part of the body such as a hand (but no protection from deliberate access); from solid objects greater than
50mm in diameter.
2
Protection against fingers or other objects greater than 12mm in diameter.
3
Protection from entry by tools, wires, etc., with a diameter of thickness greater than 2.5mm.
4
Protection from entry by solid objects with a diameter or thickness greater than 1.0mm
5
Protection from the amount of dust that would interfere with the operation of the equipment.
6
Dust tight.
Degrees of Protection - Second Digit
The second digit indicates the degree of protection of the equipment inside the enclosure against the harmful entry of various forms of
moisture (e.g. dripping, spraying, submersion, etc.)
0
No special protection.
1
Protection from vertically dripping water.
2
Protection from dripping water up to 15º from vertical.
3
Protection from sprayed water to 60º from vertical.
4
Protection from splashed water from all directions - limited ingress permitted.
5
Protection from low pressure jets of water from all directions - limited ingress permitted.
6
Protection against heavy seas, or powerful jets of water e.g. for use on ship decks.
7
Protection against temporary immersion between 150mm and 1m.
8
Protection against complete, continuous submersion in water. Submersion depth and time must be specified by the end-user. The
requirement must be more onerous than IP67.
For Example . . .