IK classification: Importance and selection for luminaires

What is the IK classification according to EN 62262?

The IK classification is an internationally recognised standard for assessing the mechanical impact resistance of enclosures for electrical equipment. It indicates how resistant a product is to mechanical impacts such as shocks, vandalism or accidental force. The standard was developed to ensure that electrical and electronic devices - depending on the environment in which they are used - have an appropriate level of protection. Electricians and technical planners must take these values into account in order to ensure the durability and safety of lighting systems.

The IK class of a luminaire is determined on the basis of the maximum impact energy that the luminaire can withstand without losing its specified IP protection rating. These values are defined in the EN 62262 standard. The standardised test methods for determining the mechanical resistance of electrical equipment are defined in standard EN 60068-2-75. For luminaire housings, the luminaire standard EN 60598-1 specifies a minimum protection rating of IK03, while the transparent cover must have an impact resistance of at least IK class IK02.

IK11+: Protection up to 150 Joule

NORKA tests the impact resistance up to 150 joules and marks this with the indication IK11+ to make clear that the test exceeds class IK11. This test is carried out analogue to the methods specified in EN 60068-2-75.

IK classification for luminaires: Why impact resistance is key

The impact resistance of luminaires is particularly important in demanding environments such as industrial plants, access routes, public transport and street lighting. A high IK class ensures that the lighting remains functional even in the event of accidental or intentional damage.

Luminaires in passageways, railway stations, prisons or car parks are often exposed to deliberate violence. Here, IK10 or IK11 luminaires are particularly recommended to minimise long-term maintenance costs and safety risks. In industrial environments, on the other hand, luminaires not have to withstand vandalism, but also accidental impacts from vehicles or machinery.

The IK class also plays a role in the selection of materials for the luminaire housing. Metal housings or resistant plastics such as polycarbonate or tempered glass are common materials to ensure high impact resistance.