Siemens Industry Online Support
Siemens AG
Entry type: Product note Entry ID: 109755394, Entry date: 02/01/2018

Classification of the reaction of cables to fire according to EU Construction Products Regulation EU305/2011 (CPR)

  • Entry
  • Associated product(s)
Classification of the reaction of cables to fire according to EU Construction Products Regulation EU305/2011 (CPR)

The Construction Products Regulation is intended to help minimize fires in buildings and to prevent fires. Data and power cables that are installed permanently in a building (e.g. in floors, ceilings and walls) fall under the new EU-wide regulation 305/2011 (Construction Products Regulation, CPR). It replaces the construction product guideline 89106EEC and is legally binding in all EU states. A construction product is a product that is permanently installed in a building structure and thus contributes to the function of the building structure. Cables that connect a device to the building structure via a plug connector (e.g. temporary network connection via patch cable) are not covered by this regulation. Also not covered by this regulation are cables with a plug connector on both sides, cables with functional integrity or cables within machines, and cables that were manufactured for specific industrial processes (machine is a temporary installation in a building).
This means that cables that are installed permanently in a building must be CE-marked according to the construction product regulation and must have a declaration of performance (DOP) from the manufacturer. This declaration of performance thus certifies compliance with fire classes.
To enable implementation of the construction products regulation, the reaction of the cables to fire was described in DIN EN 50575 and assessed in terms of flame spread, heat development, smoke production, acid formation and formation of flaming droplets. For simplicity, the cables assessed in this way are divided into fire classes / Euro classes with the classification A-F as is usual according to the construction products regulation, (DIN EN 13501-6, ca= cable).

Aca (non-flammable)

B1ca or B2ca (very high safety requirements)

Cca (high safety requirements)

Dca (medium safety requirements)

Eca (low safety requirements)

Fca (no safety requirements)

Examples of buildings with very high safety requirements in terms of fire protection are hospitals and children's daycare centers. Examples of buildings with high safety requirements in terms of fire protection are offices and administrative buildings. It is still necessary to assess the location of the cable installation and whether the cable is installed along an emergency escape route or in any location in the building.

The fire classes are supplemented by a property profile regarding

Smoke production (s1 to s3 according to EN50399/EN61034)

Acidity (a1 to a3 according to EN60754-2)

Flaming droplets (d0 to d2 according to EN50399).

To be able to ensure product quality in the long term, EN50575 also defines conformity monitoring, depending on the classification. Depending on the classification level, type sample checks and regular site audits or just type sample checks need to be carried out.

The product class used for the respective building is at the discretion of the planning engineer who needs to estimate and assess the security requirements of the building (e.g. industrial building).


On delivery, the packaging of the SIMATIC Net cables is labeled with the relevant CE marking. The fire class and suitability profile continue to be specified in the data sheet.




You can find the declaration of performance for the SIMATIC NET cables at the following link: 



Security information
In order to protect technical infrastructures, systems, machines and networks against cyber threats, it is necessary to implement – and continuously maintain – a holistic, state-of-the-art IT security concept. Siemens’ products and solutions constitute one element of such a concept. For more information about cyber security, please visit