Burning Behaviour of Bunched Cables. IEC The European Commission and The European Cable Industry (EUROPACABLE) are finalising. Definitions. IEC refers to various definitions, together with the following during the standard: .. F – B F. Category C, designation F – 3C F. IECC describes a method of type approval testing to define the ability of bunched cables to resist fire propagation. In this test, a cable specimen.
|Published (Last):||18 October 2016|
|PDF File Size:||18.24 Mb|
|ePub File Size:||9.38 Mb|
|Price:||Free* [*Free Regsitration Required]|
LSF cable is designed to reduce the spread of fire, toxic gases and smoke during fire. The specimen is deemed to pass this test if the pH value is not less than 4.
The fire resistant cables exhibit same performance even under fire with water spray or mechanical shock situation. A single survival category W is defined if the cables surpassed the testing requirement.
Fire resistant cables are designed for maintaining circuit integrity during a fire. The laser system is similar to that used in the cone calorimeter and complies with ISO incorporating an advanced noise reduction specification. Fire retardant cables are designed for use in fire situations where the spread of flames along a cable route need to be retarded.
To qualify for a riser rating, the cables must have the flame spread of less than 12 feet beyond the ignition point.
IEC TS | IEC Webstore
No matter the cables are installed in single wire or in bundles, during a fire, the flame spread will be retarded and the fire will be confined to a small area, thus reducing the fire hazard due to fire propagation. This specifies a test for determination of the amount of halogen acid gas, other than the hydrofluoric acidevolve d during combustion of compound based on halogenated polymers and compounds containing halogenated additives taken from cable constructions.
IEC is used to assess the flame propagation chacteristics of bundled cables. The lowhalogen content and low corrosivity of low smoke fume cables lies somewhat in between fire retardant cable s and LSZH cables. In this test, a cable specimen, consisting of number of 3. The specimen is deemed to have passed this test, of after burning has ceased, the charred or affected position does not reach within 50mm of the lower edge of the top clamp which is equivalent to mm above the point of flame application.
IEC details a method of test for assessing the fire resisting characteristics of a cable. However, in European countries, halogen content, the corrosivity of the gases, the smoke density and the toxicity of the gas are equally important factors affecting the safety and survival of human during a fire.
Burning Behaviour of Bunched Cables
This test details a method of test for the assessment of the flame propagation characteristics of a single wire or cable. The duct section houses all gas sampling probes, temperature and mass flow probes needed, and the smoke measuring system. The cables will be tested under the following temperatures: Comparitively speaking, the fire performance requirement for BS is more demanding.
The CMG cables are usually used in runs penetrating single floor. In American fire standard, the concern lies more on the first two and it differs from the European standard which concerns all these aspects.
603332-3c survival categories are defined: Cable samples on a vertical shaft are burned at The European Electrical Committee categorized the fire performance of the cables into three classes, namely. If a cable can pass a specified UL fire standard, an UL performance verification mark can be applied onto the cable jacket, illustrating both the UL class and the number.
Therefore, to control the heat release is the most important concern for reducing the fire hazard. This test specifies a method for the determination of degree of acidity of gases evolved during combustion of cables taken from the cable sample by measuring its pH and conductivity.
Test for vertical flame spread of vertically-mounted 60332-c wires or cable – Category A -Installation In one layer front. General purpose cables meets UL The test method is not suitable for the testing of some small wires due to the melting of the conductors during the time of application of the flame.
During a fire, 6032-3c cable will emit less smoke and acid gases which may damage the human being and expensive equipment.
The higher the toxicity index, the 6033-23c toxic the cable material is. The restricted cable meets ULLimited-use. It details the ief methods to categorize the cables according to cable withstand capacities. Resistance to fire with water spray — a new sample of cable is exposed to flame at C for 15 minutes while passing a current at its rated voltage and then the spray is turned on to give exposure to both fire and water for a further 15 minutes.
There are four primary fire testing standards as follows:. To determine if the cable is halogen free, IEC should be used.