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Flame Test Classification

IEC 60332-1-2 / EN 60332-1-2 / VG 95218-2 Method 1 / BS 4066 Part 1 / VDE 0482-332-1-2
Test set-up The single cable under test is secured vertically and flamed with a burner at an angle of 45° to the vertical. Test apparatus acc. to IEC / EN 60332-1-1.
Flame temperature Determined by the stipulated setting of the burner flame.
Test duration Cable with a diameter of D ≤ 25 mm: 60 ± 2 sec, Cable with a diameter of 25 < D ≤ 50 mm: 120 ± 2 sec, 50 < D < 75 mm: 240 ± 2 sec , D > 75 mm: 480 ± 2 sec
Compliance criterion The fire damage must end at least 50 mm below the upper fixing clamp. The cable must be self-extinguishing.
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IEC 60332-3 / EN 60322-3 / VDE 0482-332-3
Test set-up The cables are secured to a ladder, close together or spaced apart depending on the type of fire. The cables can be secured in several layers. Test apparatus acc. to IEC / EN 60332-3-10.
Flame temperature Determined by the stipulated quantity of propane gas and air.
Test duration IEC Part 21/EN Part 21: Category A F/R for special applications only, IEC Part 22/EN Part 22: Category A (7 l flammable material/m): 40 min, IEC Part 23/EN Part 23: Category B (3.5 l flammable material/m): 40 min, IEC Part 24/EN Part 24: Category C (1.5 l flammable material/m): 20 min, IEC Part 25/EN Part 25: Category D (0.5 l flammable material/m): 20 min
Compliance criterion The visible area of fire damage to the cables must not exceed 2.5 m in height from the bottom edge of the burner.
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UL 1685 FT4 / IEEE 1202 / UL 2556 Section 9.6 Method 2 (CSA method)
Test set-up The cables are secured to a ladder in a single layer (quantity depends on the diameter of the cable). The length of each sample is 2.44 m. Cables with a diameter of <13 mm are secured to the ladder in bundles. The burner is tilted at an angle of 20°.
Compliance criterion The area of fire damage to the cables must be less than 1.5 m (measured from the bottom edge of the burner nozzle).
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IEC 60331-25
Test set-up The fibre optic cable is laid horizontally and the optical fibers must be connected. The flame is applied under the cable from a horizontally offset position across a width of 1200 mm.
Compliance criterion When the flame is applied and during a cooling period of an additional 15 minutes, it must still be possible to transmit signals via the optical fibers.
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IEC 60331-1 / IEC 60331-2
Test set-up The cable is secured onto a positioning board and a flame is applied from the front. The positioning board is subjected to shocks every 15 minutes during the combustion period. Part 1: cables with a diameter > 20 mm Part 2: cables with a diameter ≤ 20 mm Test apparatus acc. to IEC 60331-11.
Compliance criterion When the flame is applied, it must still be possible to transmit power or signals via all conductors. There must be no short circuit between the conductors or to the shielding.
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IEC 60331-21 / IEC 60331-22 (draft) / IEC 60331-23
Test set-up The cable is laid horizontally, with the core and shield connected to a power supply at the following voltages - High voltage cables 0.6/1 kV: U0/U min. 100 V - Data cables: 110 V The flame is applied under the cable from a horizontally offset position across a width of 1200 mm. Part 21: power and control cables ≤1 kV Part 22 (draft): power cables > 1 kV Part 23: copper data cables
Compliance criterion When the flame is applied and during a cooling period of an additional 15 minutes, it must still be possible to transmit power or signals via all conductors. There must be no short circuit between the conductors or to the shielding and no open phase.
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Smoke Density IEC 61034-2 / EN 61034-2 / VDE 0482-1034-2 / NF C32-073-2
Test set-up A cable specimen is burnt in a closed chamber using a flammable liquid. The light transmittance of the resulting smoke is measured optically. Test apparatus acc. to IEC/EN 61034-1
Flame temperature Determined by the quantity and composition of the fuel.
Test duration 40 min
Compliance criterion The smoke must transmit the light at the end of the test’s duration, as stated in individual specifications. The recommendation of light transmission is 60 % minimum.
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Corrosiveness of the combustion gases (absence of halogen)
IEC 60754 / EN 50267 / VDE 0482-267-1 / NF C32-074
Test set-up This standard covers the general aspects of corrosiveness of smoke and combustion gases dissolved in water or atmospheric moisture as well as the potential hazard (general guidelines).
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IEC 60754-1 / EN 50267-2-1 / VDE 0482-267-2-1 / NF C32-074-21
Test set-up A sample of between 0.5 g and 1.0 g is heated in a tube. The resulting gases are dissolved and tested for their halogen content. Test apparatus acc. to EN 50267-1.
Flame temperature 800 ± 10 °C
Test duration 40 ± 5 minutes in total, with at least 20 minutes at the maximum temperature
Compliance criterion The amount of halogen acid is expressed as mg of hydrochloric acid per gramm mass of sample
IEC 60754-2 / EN 50267-2-2 / VDE 0482-267-2-2 / NF C32-074-22
Test set-up A sample of 1 g of all non-metallic cable components is burnt in a furnace. The pH value and the conductivity of the combustion gases dissolved in water are measured. Test apparatus acc. to EN 50267-1.
Flame temperature At least 935 °C
Test duration 30 min
Compliance criterion The pH value and the conductivity must be measuered. Recommendation: The pH value of the washing water must be at least 4.3, the conductivity of the washing water must be at most 10 μS/mm. The criteria are valid for one non-metallic component of a cable.
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