The scope of the test according to DIN 4102-1: 1998-05 section 6.2 is the classification of building materials by their fire behavior. The test (see 6.2.5) represents the stress of a small, defined flame (matched flame). Under these conditions, the flammability and spread of the flame must be limited within a certain time. For more information, see DIN 4102-1: 1998-05 section 1.2. The test is considered to have passed if none of the five samples:
a) for edge flaming (sample size = 90 mm width x 190 mm length); According to 6.2.5.2 and
b) in the event of surface exposure (specimen size = 90 mm width x 230 mm length), the flame tip reaches the measuring mark within 20 seconds, according to 6.2.5.3.

• Fire tests according to DIN EN ISO 11925-2 Flammability of products under direct flame

The only currently available standard featuring inspection requirements for cable systems with integrated functional maintenance is the German national Standard DIN 4102 Part 12.

The purpose of an inspection according to DIN 4102-12:1998-11 is the classification of electrical cable systems which must maintain their functionality for a certain amount of time during a fire. The maintenance of functionality of electric cable systems must be certified by a test certificate following an inspection based on this Standard. As a recognised testing authority under the state building code, we will support you in obtaining this certificate.

In addition, we offer to conduct fire tests as orientation for your product development.
Inspections according to DIN 4102-12:1998-11 apply to cables with a nominal voltage of up to 1kV.

Inspections according to DIN 4102-12:1998-11 will be applied in accordance with Section 4 of the standard
for:

• Cable systems in cable ducts or shafts (DIN 4102-12:1998-11, Section 7.3.2),
• Cable systems with integrated functionality maintenance (DIN 4102-12 1998-11, Section 7.3.3),
• Cable systems with coatings and linings (DIN 4102-12:1998-11, Section 7.3.4),
• Busbar trunking systems in ducts or shafts or with integrated functionality maintenance.

Subject of the test are cable systems with functional integrity
according to DIN 4102-12. Simplified: Every single combination of mounting system and cable
hast to be tested.
More specific:

• Power cable two specimen 4 x 1,5 mm² and two specimen 4 x 50 mm² or greater Diameter
• Telecommunication cables two specimen with the lowest number of conductor/pairs

During one test several cable systems can be tested; The amount is limited by the dimensions of the furnace with the dimensions: Length 4000 mm and Width: 3000 mm and Height: 2500 mm.

The dimensions of the furnace area to be used for the test according to DIN 4102-12 is 4.00 m long, 3.00 m wide and the height is max. 1.00 m for cable trays (total furnace height is 2.5 m, bottom 1.5 m not to be used for cable trays due to burners). So the length of the cable trays has to be about 5 m (4 m in the furnace, 0.25 cm walls 2x, and about 0.25 cm of tray outside 2x). The vertical distance between trays using the same suspension construction shall be about 25 cm, so max. 3 layers of trays will be possible, if you intend to use more than 1 layer in end use condition. The furnace of DMT is equipped with 24 connections for 400 Volts only (fuse No 1-24) plus 12 connections for 110 volts only (fuse No. 25-36) ) plus 12 connections each for alternative use with 400 volts or 110 volts (fuse No. 37-48).

The preparation of furnace (ceiling, testable wall elements) will be done by DMT. The Installation of the cable laying / mounting is the responsibility of the Client. The specimen can be mounted trough reinforced autoclaved lightweight concrete.

During the test temperature follow the uniform-temperature-timecurve (ETK) with

• t_30min 822 °C
• t_60min 925 °C
• t_90min 986 °C