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

The higher the oxygen index of the materials used in the flame-retardant cable , the better the flame retardant performance, but with the increase of the oxygen index, some other properties will be lost. If the physical properties and process performance of the material are reduced, the operation is difficult, and the cost of the material is increased at the same time, the oxygen index must be reasonably selected appropriately. The oxygen index of the general insulating material reaches 30, and the product can pass the test of the Class C in the standard. It is required that if the sheathing material and filler material are made of flame-retardant materials, the product can meet Class B and Class A requirements. Flame-retardant cables are mainly divided into halogen-containing flame retardant materials and halogen-free flame-retardant materials.

Flame retardant cable introduction

Restricting combustion to local limits will not cause any spread, keep other equipment, and avoid causing greater losses.

Fire-retardant cable structure features

All or part of the use of flame retardant materials.

Classification of flame-retardant cables

Flame-retardant cable, divided halogen-containing flame retardant cable and halogen-free low-smoke flame-retardant cable.

1. Halogen-containing flame-retardant cables are not conducive to fire fighting and rescue work, resulting in serious "secondary hazards."

2. Halogen-free and low-smoke flame-retardant cables have good flame-retardant properties and the amount of smoke is close to the recognized "low smoke" level.

  

How to identify low-smoke halogen-free flame-retardant cables

1. The product name needs to be read carefully to avoid the blinding of the cottage products

Imitations generally have a slightly different name.

2. Burning skin test insulation layer with or without depression

Barbecue with a lighter, if there is a large depression, indicating that there is a defect in the material or process.

3. Soak in hot water to see the change of insulation resistance

Under normal circumstances, the insulation resistance does not drop sharply and remains above 0.1 megohms/Km.

4 contrast density recognition

Fire-retardant cable material is denser than water and floats above the water surface.

  

The difference between flame-retardant cables and fire-resistant cables

1. The difference between principles

Halogen-containing cable flame retardant principle is the flame retardant effect, halogen-free cable flame retardant principle is to reduce the temperature. The principle of fire-resistant cable is mica material.

2. The difference between structure and material

The basic structure of flame retardant cable:

(1) Insulation

(2) Sheath and outer sheath

(3) wrapping and filling

A refractory layer is added between the fire-resistant cable conductor and the insulation layer, which can withstand long-term combustion and ensure normal operation of the line.

  

3 advantages and disadvantages

The characteristics of flame-retardant cables: The cost is lower, the spread of flame is controlled within a certain range, and the fire protection level of the cable line is improved.

Fire-resistant cables: The amount of sour gas generated is small, fire-retardant and fire-retardant properties are greatly improved, and the complete operation of the line is maintained.

Editor's summary: The above is about the difference between the flame-retardant cable and the fire-resistant cable, and I hope to help friends who have this requirement! For more information, please continue to pay attention to our website, follow-up will show more exciting content. You can also purchase your favorite product on Qijia Mall!

Flame retardant cable

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