DIN 4102 Part 12

In Germany, the DIN 4102 Part 12 standard applies to cable systems with circuit integrity maintenance. It regulates the requirements and measures for ensuring the circuit integrity maintenance of electrical cable systems in the event of fire.

The scope of application is limited to cables with rated voltages up to 1 kV. Standard support structures are also defined by DIN 4102 Part 12.

The following contents are included in the standard:

Scope of application
Normative references
Cable system and circuit integrity maintenance
Measures to achieve circuit integrity maintenance
Proof of circuit integrity maintenance
Requirements for
Testing
Transfer of test results
Test certificate
Proof of conformity
Marking

In general, electrical wiring systems must remain functional for a period of 30 (E30) or 90 minutes (E90), which are responsible for supplying life-saving current collectors in the event of a fire.

The background to this is to ensure the safe evacuation of people from the building and to minimize material damage.

E30: 30 minutes for rescue and evacuation

The first 30 minutes after the outbreak of fire are elementary when it comes to timely evacuation.

Circuit integrity maintenance must therefore be ensured for the following facilities:

Passenger elevators
Fire alarm systems
Systems for issuing instructions
Alarm systems
Smoke extractors
Safety lighting systems

E60/90: Up to 90 minutes for firefighting and demanding evacuations

After the initial evacuation, effective firefighting must be ensured. To this end, the relevant technical equipment must be supplied with power for up to 90 minutes.

These include:

Fire department lifts
Bed elevators in hospitals, nursing homes and similar facilities
Automatic extinguishing systems
Pressurized smoke protection systems
Mechanical smoke extraction systems
Water pressure booster systems

Cable systems with integrated circuit integrity maintenance in accordance with DIN 4102 Part 12 include the cable laying system (e.g. cable ray, cable ladder) in combination with specific cables.

However, cables that have been tested on a standard support structure may also be installed on the standard support structures of other manufacturers without separate testing.