Safety is undoubtedly very important, which is why you need to look for solutions that will provide it. Fire protection cables, which are used in alarm systems, for example, are definitely worth considering. In fire conditions, cables do not degrade quickly. It is worth learning more about such cables and choosing the best models.
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In what places and installations are fireproof cables used?
Fireproof cables are nothing more than special wires that are found in various types of installations. Such a cable significantly increases safety. It is important to know that these models meet the most restrictive safety standards. They are used wherever effective evacuation is required. They prevent the spread of fire. What distinguishes them is the fact that they have special reinforcements, thanks to which it is much more difficult for their insulating layer to burn through.
In addition, they are fire-resistant. The cable has a concentric core. It then maintains the E90 function class, which means that it provides power or control of the system in the event of a fire for 90 minutes. It should be found in industrial devices, but also in all industrial facilities. It is part of modern construction and fire safety.
The cable core burns out much later, which is why such a cable is ideal for fire conditions. Its application is wide. It should be found in buildings and facilities with increased fire protection requirements. Note also that it prevents the spread of flames on the cable bundle. Such cables should be found in skyscrapers, hospitals, museums, and therefore in all public places.
They should power the control of specific receivers, e.g. air conditioning, signaling devices. They must also be located in places where signals are transmitted. Apart from the fact that such cables should be located in power plants, they must be used in dry rooms, where they will be used to power lighting. Emergency lighting is of particular importance here.
How to recognize a good quality fireproof cable?
Good fireproof cables prevent the spread of fire. Hence, they must be found in facilities or installations. At the same time, you should choose those that are made of high-quality materials. For example, you can choose multi-core cables in which the cores are copper. Environmental resistance is also important, and here you can choose halogen-free cables.
In addition, they should not spread flame on a single cable, and also not spread fire on a cable bundle. Also pay attention to the operating temperature. The permissible temperature of the working cores should not be lower than 90 degrees Celsius. However, the permissible temperature of the cores during a short circuit should be about 250 degrees Celsius. Remember that the cables should meet the DIN 4102-12 standards.
What markings must a fireproof cable have?
Fire protection cable should have appropriate markings. Thanks to it, the spread of fire is smaller. It should be remembered that the cable in both signaling devices and control devices should have specific markings. First of all, the symbol E plays an important role here.
It indicates the ability of the cable to maintain electrical functions. The number is an indication of the time expressed in minutes. This means that if the cable is marked E90, it maintains power supply to devices and voltage for 90 minutes. If power cables or control cables are marked E60, then this time is shorter and is 60 minutes.
It can undoubtedly be said that the longer the better, but other parameters are also important, e.g. FE 180. It indicates the ability of the cable to maintain circuit continuity, both in cables carrying current and signal. In turn, the PH marking refers to the ability of the cable to maintain circuit continuity, but the real one, i.e. direct current or signal. This prevents the spread of fire, so the better the technical parameters of the cable in the installation, the greater the safety.
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How to properly conduct fire resistance tests?
Fire resistance test is a special process during which direct combustion occurs. This means that it is a test of a cable sample to check its durability. Such tests should be performed by certified quality control plants. The measured time of proper functioning of the cable corresponds to its actual fire resistance.
The tests are performed in specially prepared places. Based on the test results, the cables receive specific safety certificates. One of the tests is the resistance of a single cable, in which case it is placed vertically on a spreading flame. This test is performed in a chamber after the fire has been stopped.
The flame on the sample will extinguish itself and if there are no visible charring or other damages on a section of no less than 50 m, counted from the lower edge of the clamp, the result is considered positive. The next test is the resistance of cable bundles placed vertically on a spreading flame. In this case, a vertical ladder is used. It is important to know that the amount of flammable materials in the cables, as well as the time of applying the flame, depends on the category that the cable must meet.
Category A is 7 liters/meter of combustible materials of cables. The flame application time is 40 minutes. Category B is 3.5 liters/meter of combustible materials of cables, where the application time is also 40 minutes. In Category C, 1.5 liters/meter of combustible materials of cables is applied, where the application time is 20 minutes. The resistance of the bundle of cables, which are arranged vertically, should be such that after a specified time and after the source of fire is removed, the flame extinguishes itself, and the length of the charred sections does not exceed 2.5 m.
What design requirements must fire resistant cables meet?
The use of wires is intended to provide a higher level of safety. Each power wire, as well as signal wires, should meet strict standards. Fire-resistant cable can also be used in heating devices. It is necessary that it fully meets the design requirements. It is important to know that all cables and wires should take into account not only Polish regulations, but also EU regulations.
The annex to the MliB regulation on the properties of construction products lists covers for protecting power, control and communication cables. The covers must meet CPR standards, which apply throughout the European Union. Each cable should have national systems for assessing and verifying constant performance. The reaction to fire class must also be specified, but subclasses are also used, where S means smoke emission, D means burning droplets or particles, and A means acidity.
How to properly route and install fireproof cables?
Halogen-free cables used for example in data transmission, but also in dry places contribute to faster fire extinguishing. The materials used in them prevent the transfer of fire for a certain period of time and maintain the power supply elements in working condition. They should be used on a wide scale.
Halogen-free cable is also designed to protect rooms in power plants or air conditioning systems. Correct installation and cable routing are important. They should be mounted above water and sprinkler installations. At the same time, it is important to know that cable insulation, as well as all connecting elements, including boxes, must have a fire resistance class no lower than the resistance class along the entire route. They must be laid with a margin, while the cable holders should have a diameter one higher than the cable cross-section.
Fireproof cables at the Onninen wholesaler
We recommend fireproof cables from the Onninen wholesaler. It is worth choosing the fireproof power cable (N)HXH-J FE180/E90 5x4 1KV drum G-144923 . It is very durable. It has really good technical parameters and the E90 function. It should be used in places where special protection is required. We mean power plants or hospitals.
Also worth noting is the HDGsżo 3x1.5 500V halogen-free FE180 PH90/E30-E90 B52051 fire-resistant cable . Such cables are used on a wide scale. They provide insulation durability under direct flame exposure for 180 minutes. They should be used in emergency installations. They also have special screening, which means they have a copper shield.
It is also worth choosing the fire-resistant power cable (N)HXH-O FE 180/E90 1x240 RMC 1KV drum G-144643 Telefonika . This is another product with a wide range of applications. It is resistant to both fire and smoke. The production of burning particles is minimal in its case. The cable screen serves as a kind of protective collector and at the same time prevents interference.