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What is the difference between fire-resistance cable and flame-retardant cable ?

Mar 29, 2022 Honrey Cable

What is the difference between fire-resistance cable and flame-retardant cable ?

With the development of economy and the improvement of people’s living standards , people have more and more requirements to the safety of cables and wires , especially for cable fire-resistance and flame retardant performance. So , how to distinguish fire-resistance cable and fire-retardant cable ? Now , let Honrey Cable introduce the difference from the following aspects :

1.What is fire-resistance cable ?

2.What is flame-retardant cable ?

3.Are fire-resistance cable and flame-retardant cable interchangeable ?

4.What is the difference between fire-resistance cable and flame-retardant cable ?

5.How to choose fire-resistance cable and flame-retardant cable suppliers ?

1.what is fire-resistance cable ?

Fire-resistance cable is a cable that can maintain the normal power supply or use for a period of time when the fire occurs.

Fire-resistant cables can normally operate for at least 3 hours at a flame temperature of 750~ 800℃。

Fire resistance cables are widely used in school, hospital, high-rise residential buildings ,subway stations, underground streets, power stations, important industrial and mining enterprises and other places related to fire safety and fire saving,such as power supply lines and control lines of fire fighting equipment and emergency guide lights and other emergency facilities .

The following suggestions are made on the selection of conductor materials, mica tape, insulating materials and auxiliary materials of fire-resistance cable:

1)Selection of Fire-resistance cables conductor :

The temperature of fire resistance test should reach 750+50℃ , and the melting point of aluminum conductor is 685℃, so aluminum conductor can not be used as the conductor of fire-resistance cable . Copper’s melting point is above 1000℃ , so it can be used as the conductor of fire-resistance cable .

In addition , because the structure of the circular conductor is smoother than that of the shaped conductor , the force of the mica strip is more uniform and will not cause damage to the mica strip , so the circular conductor is more suitable for the fire-resistance cable .

2) Selection of Mica belt :

The fire-resistance temperature of synthetic mica is higher than that of gold mica , so synthetic mica is recommended for the safety of fire-resistance cable and the stability of fire-resistance cable quality .

3) Selection of insulation:

PVC, PE and XLPE are commonly used as insulation materials for refractory cables, but the effect of PE and XLPE is better than PVC, because at 750+50℃, the mixture of PVC combustion solid residue CaO Cacl2 is in a relatively stable state, adhesion on the outside of the mica belt, and internal stress will be generated in the combustion process.  The extrusion of mica strip damages the mica strip and affects the fire resistance.

4)Selection of auxiliary materials:

 As auxiliary materials for fire-resistance cables, the principle of least residue after combustion should be followed.

2. what is flame-retardant cable ?

Flame-retardant cable is a cable that can limit the combustion to a local area and does not spread when a fire occurs . It has the characteristics of self-extinguishing after fire .

In addition , flame-retardant cable has the characteristics of : in the case of fire ,cable may be burned out and can not operate , but can prevent the spread of fire .

3. Are fire-resistance cable and flame-retardant cable interchangeable ?

Usually , fire-resistance cable can replace flame-retardant cable , but flame-retardant cable can not replace fire-resistant cable .

4.what is the difference between fire-resistance cable and flame-retardant cable ?

1).Flame-retardant cable : The insulation , the sheath, the wrapping and the filling of flame-retardant cable are use flame retardant materials .

    Fire-resistance cable : fire-resistance cable are usually made by adding a fire-resistance layer between the cable conductor and the cable insulation .

2)Flame retardant cable is characterized by retarding the flame spread along the cable so that the fire does not expand . Compared with the fire-resistance cable ,its cost is lower .

   Fire-resistance cable can maintain normal operation for a certain time under the condition of flame burning , and can maintain the integrity of the line . Compared with the flame retardant cable , the cost is higher .

5.How to choose fire-resistance cable and flame-retardant cable suppliers ?

If you want to buy fire-resistance cable and flame-retardant cable , welcome to contact Honrey Cable .

Our team has nearly 20 years of supply experience in overseas markets , cables are very popular in South America , North America , Europe and other markets , we have won a large number of loyal customers with good pries and stable supply quality .

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