IP and IK protection ratings applied to access control: IEC 60529, IEC 62262, IP65 vs. IP66, IK07–IK10, and specification criteria.
Check it out!
The IP protection rating indicates the protection provided by an enclosure against access to hazardous parts and the ingress of solid objects and water, according to IEC 60529. The IK protection rating, in turn, classifies the enclosure’s resistance to external mechanical impacts, according to IEC 62262. In access control, these ratings help select readers, interfaces, intercoms, push buttons, enclosures, and other devices for the environment in which they will actually be installed.
Although searches such as IP rating, IP protection index, IP65 vs. IP66, IK rating, and IP IK are common, IP and IK are not generic seals of “ruggedness.” Each code addresses a specific type of exposure. An IP65 reader may be suitable for rain and dust, but still require analysis of temperature, solar radiation, corrosion, vandalism, condensation, installation, cabling, and maintenance. Likewise, IK10 says nothing about watertightness.
IP and IK measure different risks
IP and IK should be defined from the environment and the risk at each point. Copying the highest catalog rating can increase cost without solving the actual problem.
The first design decision is not to confuse the two codes. IP relates to the enclosure’s protection against solids and water. IK relates to the mechanical impact energy the enclosure withstands under the test conditions defined by the standard.
| Code | What it classifies | Design question |
| IP | ingress of solids and water | is the enclosure suitable for the environmental exposure? |
| IK | external mechanical impact | can the equipment withstand the expected physical exposure? |
| Temperature | equipment operating range | will it operate under the site’s actual heat/cold conditions? |
| Corrosion/material | resistance to chemical or saline environments | can the enclosure and fasteners withstand the environment? |
| UV | stability under solar radiation | will outdoor materials degrade prematurely? |
A sound design uses these properties together. There is no single IP or IK rating that is correct for every access control system.
How to read an IP rating
The IP code normally has two digits after the letters IP. The first digit represents the degree of protection related to access to hazardous parts and the ingress of solid objects. The second represents protection against water ingress under the corresponding test conditions.
In access control practice, some combinations appear frequently:
| Example | General interpretation | Possible application |
| IP54 | defined protection against dust and splashing water | protected area subject to dust and splashes |
| IP55 | protection against dust and water jets | outdoor equipment with moderate exposure |
| IP65 | dust-tight and protected against water jets | outdoor reader exposed to weather under the specified conditions |
| IP66 | dust-tight and protected against powerful water jets | more severe exposure to projected water |
| IP67 | dust-tight and protected for a defined temporary immersion condition | specific applications with a risk of temporary submersion |
The table is a summarized design interpretation. Complete criteria, test methods, and application conditions are defined in IEC 60529.
IP65 and IP66 do not mean “good” and “better” in every situation
A search for IP65 IP66 often leads to the assumption that selecting the higher number is enough. In the first digit, both have level 6 for solids. The difference is in the second digit: 5 and 6 correspond to different water-exposure conditions.
An IP66 device may be appropriate where more intense exposure to water jets is expected, but that does not automatically address other risks. If the predominant problem is vandalism, impact, corrosion, or extreme temperature, moving from IP65 to IP66 may not address the relevant cause.
In addition, the specification should require exactly the condition that is needed, not the highest number available in the catalog. Disproportionate requirements can reduce competition without measurable technical benefit.
The first IP digit addresses solids and access to hazardous parts
For outdoor electronic equipment, level 6 is often desirable because it corresponds to a dust-tight enclosure condition. Indoor environments, however, may allow different ratings depending on the installation.
The selection should consider actual exposure: a clean administrative area, parking lot, loading dock, particulate-heavy industrial area, process environment, or outdoor installation. The design also needs to consider whether the equipment is protected by a canopy, recess, additional box, or technical enclosure.
The second IP digit addresses water under specific test conditions
Rain, splashes, jets, washdown, and immersion are different situations. The rating must be compatible with the expected form of exposure. At gates, loading docks, outdoor areas, and environments subject to washdown, this can significantly change the specification.
It is important not to extrapolate the code. IP67, for example, does not automatically mean unlimited water resistance or suitability for any immersion depth or duration. The code is tied to the conditions defined in the normative test.
The IK protection rating addresses mechanical impact
IEC 62262 classifies the protection provided by an enclosure against external mechanical impacts. In access control, this is relevant for readers installed in public areas, gates, building entrances, parking facilities, schools, terminals, industrial environments, and locations subject to vandalism or accidental impact.
Some commonly known levels are:
| IK code | Associated impact energy |
| IK07 | 2 J |
| IK08 | 5 J |
| IK09 | 10 J |
| IK10 | 20 J |
The test energy should not be interpreted as a guarantee that the equipment will withstand every form of vandalism. Geometry, impact point, mounting, substrate, and repeated attacks can create conditions different from those covered by the test.
An outdoor reader needs more than IP
Access control readers are often installed exactly at the boundary between indoor and outdoor environments. In addition to rain and dust, they may be exposed to direct sunlight, thermal variation, condensation, salinity, impacts, and tampering attempts.
Therefore, the design should simultaneously verify:
- an IP rating compatible with water and solid exposure;
- an IK rating compatible with the impact risk;
- the operating temperature range;
- enclosure material and finish;
- UV resistance when exposed to sunlight;
- installation and sealing conditions;
- tamper or removal-detection features when required;
- compatibility of connectors and cable glands with the expected exposure.
One manufacturer may rate a reader IP65 and IK07 for harsh indoor and outdoor environments, while another device intended for public areas may reach IP66 and IK08. The appropriate value should derive from the location and risk, not from an isolated commercial comparison.
The equipment rating can be compromised by improper installation
The declared code applies to the product in the configuration and mounting conditions that were evaluated. Additional holes, unsuitable cable glands, an improperly closed cover, damaged gasket, incompatible junction box, or incorrectly oriented cable entry can compromise the protection of the installed assembly.
This is critical in retrofit and construction work. Specifying an IP66 reader is of little value if the cable enters through a box without equivalent protection and allows water into the connection. Engineering must consider the complete point pathway: equipment, bracket, box, conduit, connection, drain where applicable, and interface with the wall or structure.
IP does not indicate corrosion resistance
Coastal, industrial, chemical, or other aggressive environments require additional analysis. An enclosure may meet a given IP rating and still suffer premature corrosion of its material, screws, connectors, or bracket.
The specification should address materials, coatings, and environmental compatibility when such risk exists. The same applies to solar exposure: IP is not a UV-resistance rating.
IP also does not define the operating temperature range
An IP65 reader may have a different operating range from another product with the same rating. Minimum and maximum temperatures should therefore appear as a separate requirement.
In outdoor areas, surfaces exposed to sunlight can reach temperatures above the ambient temperature measured in the shade. In cold rooms or low-temperature regions, condensation and thermal cycles must also be considered.
IK does not replace system-level anti-vandalism requirements
The reader’s ruggedness is only one layer. Controller location, communication, mounting, tamper detection, and architecture also determine the physical security of the point.
A high IK code provides stronger evidence of enclosure resistance to impact, but by itself it does not solve physical security. A rugged reader can remain vulnerable if the controller is installed on the unsecured side, if the cable can be easily accessed, or if the lock can be bypassed.
The access control design should analyze the complete barrier: controller location, reader protocol, communication security, interface protection, mounting, and tamper detection. Mechanical ruggedness of the reader is only one layer.
Indoor controllers do not need the same rating as outdoor readers
A poor practice is to copy the same environmental requirement to every component. The controller should normally be located on the secure side, in a protected enclosure or technical room. The reader, on the other hand, may be directly exposed to the outdoor environment.
This allows different requirements to be specified by component and avoids demanding extreme enclosures where there is no corresponding risk. The equipment matrix should record the environment and required rating for each family: reader, intercom, push button, controller, power supply, enclosure, sensor, or interface.
IP69 and IP69K require careful terminology
Some products are marketed with ratings associated with high-pressure and high-temperature washdown. The terminology and referenced standard should be verified in the datasheet: IP69 appears in the context of the consolidated IEC 60529, while IP69K is historically associated with specific DIN/ISO references for vehicles and equipment.
It is not advisable to write only “IP69K or higher” in a specification without defining the standard, test condition, and project need. The rating must have normative traceability.
NEMA and IP should not be converted as perfectly equivalent systems
Equipment of North American origin may show NEMA ratings alongside IP. The two systems are not identical and cover different sets of requirements. Correlation tables can help with initial screening, but should not be used to declare automatic equivalence.
When the project requires a specific rating, evidence should be based on the standard and code declared for the product.
How to specify IP and IK without locking the design to a manufacturer
A performance-based specification should relate each requirement to the environment. For example: an outdoor reader directly exposed to rain and dust with a suitable minimum IP rating; equipment accessible to the public with an IK rating compatible with the impact risk; and an operating temperature range corresponding to the site.
The specification may require:
- minimum IP code and reference standard;
- minimum IK code and reference standard where applicable;
- operating temperature range;
- conditions for outdoor use;
- materials/coatings where corrosion is a concern;
- UV resistance where relevant;
- mounting and accessories that preserve the declared rating;
- manufacturer technical documentation demonstrating compliance;
- installation inspection during commissioning.
The goal is to make clear why the rating is necessary. This reduces arbitrary requirements and facilitates technical equivalence analysis.
FAT and SAT should verify documentation and installation
IP and IK are demonstrated mainly through product documentation and manufacturer/laboratory testing; field commissioning should not improvise destructive water or impact tests.
During FAT, where applicable, documentation, model, declared rating, and required accessories are verified. During SAT, inspection should confirm mounting, closure, cable glands, boxes, orientation, and the integrity of interfaces that preserve environmental protection.
If installation modifies the enclosure or uses incompatible accessories, the fact that the datasheet lists IP65, IP66, or IK10 does not guarantee that the field assembly maintains the intended performance.
How to choose the protection rating in an Access Control Design
The Access Control Design should classify environments before equipment is selected. Based on the location, exposure to water, dust, impact, temperature, vandalism, and corrosion is defined. Only then should requirements for each device be established.
This approach avoids two extremes: underspecified equipment that fails prematurely, and excessive requirements that increase cost and reduce competition unnecessarily. IP and IK become traceable engineering criteria within the specification and equipment matrix.
Final considerations
IP and IK protection ratings are objective tools for specifying enclosures, but they measure different phenomena. IP addresses protection against solids and water; IK addresses mechanical impacts. Neither replaces analysis of temperature, UV, corrosion, installation, physical security, or architecture.
In access control, the correct rating is the one justified by the environment and the function of each device. When that justification is part of the design, the code stops being a catalog number and becomes a verifiable performance requirement.
During SAT, the declared rating must be preserved by the installation: boxes, cable glands, covers, and interfaces are part of the final performance.
Technical references
[1] IEC. IEC 60529:1989+AMD1:1999+AMD2:2013 CSV — Degrees of protection provided by enclosures (IP Code). Available at: https://webstore.iec.ch/en/publication/2452
[2] IEC. IEC 62262:2002+AMD1:2021 CSV — Degrees of protection provided by enclosures for electrical equipment against external mechanical impacts (IK code). Available at: https://webstore.iec.ch/en/publication/71109
[3] AXIS COMMUNICATIONS. AXIS A4131-E Reader with Keypad — IP65 and IK07 ratings. Available at: https://www.axis.com/pt-br/products/axis-a4131-e
[4] AXIS COMMUNICATIONS. AXIS I8307-VE Network Video Intercom — IP66 and IK08. Available at: https://www.axis.com/pt-br/products/axis-i8307-ve
[5] AXIS COMMUNICATIONS. Readers — IP65 and IK07 devices for harsh conditions. Available at: https://www.axis.com/pt-br/products/readers
Frequently asked questions
It is the classification defined by IEC 60529 for the protection provided by an enclosure against access to hazardous parts and the ingress of solid objects and water, according to the digits in the code.
Both have 6 as the first digit, related to the dust-protection condition. The difference is in the second digit: IP66 covers a more severe water test condition than IP65. This does not mean IP66 is superior for every risk.
IK10 is an IEC 62262 class associated with 20 J of impact energy in the normative test. It indicates enclosure resistance to impact, but does not guarantee protection against every form of vandalism.
The IP rating is an important indicator, but suitability for outdoor use also depends on temperature, UV, corrosion, mounting, accessories, and other conditions declared by the manufacturer.
No. An outdoor reader, a controller in a technical area, a power-supply enclosure, and other devices may have different exposures. The design should specify requirements by component and environment.
