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Setra Blog

Jun 23, 2016 5:00:00 AM

How to Interpret an IP Rating Chart

IP Ratings are used to define levels of sealing effectiveness and degrees of protection against substances in electrical enclosures. Ratings are defined by the international standard EN 60529 (British BS EN 60529:1992, European IEC 60509:1989). 

Interpretation of chart:
IP Ratings consist of two digits, each with a specific meaning:

First Digit: Solids
The first digit represents the level of protection for equipment, such as electrical conductors, against solid foreign objects.


Object size

Effective against


Not protected

No protection against contact and ingress of objects



Any large surface of the body, such as the back of the hand, but no protection against deliberate contact with a body part.



Fingers or similar objects.



Tools, thick wires, etc.



Most wires, screws, etc.


Dust Protected

Ingress of dust is not entirely prevented, but it must not enter in sufficient quantity to interfere with the satisfactory operation of the equipment; complete protection against contact.


Dust Tight

No ingress of dust; complete protection against contact.


Second Digit: Liquids
The second digit represents the level of protection for equipment against liquids in various forms such as water and moisture.


Object size

Effective against


Not Protected



Dripping water

Dripping water (vertically falling drops) shall have no harmful effect.


Dripping water when tilted up to 15°

Vertically dripping water shall have no harmful effect when the enclosure is tilted at an angle up to 15° from its normal position.


Spraying water

Water falling as a spray at any angle up to 60° from the vertical shall have no harmful effect.


Splashing water

Water splashing against the enclosure from any direction shall have no harmful effect.


Water jets

Water projected by a nozzle (6.3mm) against enclosure from any direction shall have no harmful effects.


Powerful water jets

Water projected in powerful jets (12.5mm nozzle) against the enclosure from any direction shall have no harmful effects.


Immersion up to 1m

Ingress of water in harmful quantity shall not be possible when the enclosure is immersed in water under defined conditions of pressure and time (up to 1 m of submersion).


Immersion beyond 1m

The equipment is suitable for continuous immersion in water under conditions which shall be specified by the manufacturer. 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.



IP Rating from Setra Systems



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Topics: Building Automation, General Industrial, HVAC/R

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