The main uses of fire-resistant and flame-retardant cables

1, the main use of fire-resistant cable

It is mainly used in high-rise buildings, underground railways, nuclear power plants and important industrial and mining enterprises and places related to fire safety and fire rescue, such as emergency power supply to indoor fire equipment, fire alarm equipment, signal lights, ventilation and smoke exhaust equipment, emergency elevator power supply lines.

Use characteristics: Fire-resistant cable (wire) is a cable that can still keep the line running normally for a certain period of time in the case of combustion. The difference between it and the usual flame-retardant wire and cable is that in the event of a fire, it can still transmit electrical energy to facilitate the evacuation of people and rescue important equipment.

2, the main use of flame retardant cable

It is widely used in large buildings, tunnels, petrochemical industry, power stations, mines and other places with high requirements for fire prevention. When a fire occurs, it can prevent the fire from spreading on the cable, avoid the expansion of the fire accident and reduce the loss.

Usage characteristics: The long-term allowable working temperature of the cable (wire) is consistent with the ordinary product of the corresponding standard. A correct understanding of flame retardant and fire-resistant cables is the first condition for the correct selection of them.

The difference between flame retardant wire and cable and fire resistant wire and cable

1, flame retardant wire and cable

Flame retardant means to block and delay the spread of the flame along the wire and cable, so that the fire does not expand, this type of cable has self-extinguishing ability after fire.

Flame retardant cable according to the experimental standard (GB12666-99) can be divided into three grades: ZRA, ZRB, ZRC.

In the general product naming, ZRA is usually indicated by GZR, which is called high flame retardant cable or oxygen barrier cable or high flame retardant oxygen barrier cable. ZRC stands for ZR in general flame retardant products.

Flame retardant cable is to maintain the electrical and physical and chemical properties of ordinary cables at the same time, with self-extinguishing, that is, it is not easy to burn, or when the cable itself is on fire for some reason or an external fire source is ignited, the cable no longer continues to burn after the fire is extinguished, or the burning time is very short (within 60 minutes), or the burning length is very short.

Halogen free flame retardant cable has the advantages of low toxicity, low smoke and halogen free compared with halogen containing flame retardant cable. The flame retardant level is not high, basically Class C. The reason is that the energy efficiency of halogen free radicals is greater than that of non-halide flame retardants.

The oxygen barrier flame retardant technology is mainly filled with a layer of inorganic metal hydrate between the cable insulation core and the outer sheath of the cable, which is a white glue with no smell and no halogen. Without changing the cable structure and material original parameters, it can be applied to low, medium and high voltage power cables, control cables and communication cables, and make the cable flame retardant Class A.


2, fire-resistant wire and cable

Fire resistance refers to the operation of a certain time in the case of flame combustion, that is, to maintain the integrity of the circuit, this type of cable has a certain time of power supply in the flame.

Fire-resistant cable according to the experimental standard (GB12666-99) can be divided into two grades: NHA, NHB; In the general product naming, NHA is usually represented by GNH, which is called high fire resistant cable. NHB is expressed as NH in general refractory products.

Fire-resistant cables can continue to work (transmit current and signals) in the event of a fire, and whether they themselves are burned or not is not included in the assessment. The flame-retardant cable stops working quickly in the event of a fire, and its function is that it is flame resistant and can self-extinguish without spreading.

The fire-resistant cable can maintain normal operation for 180 minutes at 750~800℃ flame combustion.

Fireproof cable is actually another type of fireproof cable. It is made of copper as a conductive wire core, seamless copper tube as a sheath, and inorganic mineral magnesium oxide as insulation materials.

Because the whole is composed of inorganic materials, the entire fireproof cable does not burn, nor does it burn. And it can withstand fire. The test shows that: in the flame of 800~900℃ for 2 hours, the cable has been normal power operation, burning under the flame of 1000℃ for 30 minutes is still intact, continue to operate normally. Generally, the normal working temperature is 250℃, which can operate safely and reliably.

In addition, this type of fireproof cable is also known as mineral cable

Qingdao Tianxing Cable Co., Ltd. focuses on the production of customized wire and cable manufacturers, main: fire wire and cable, power cable, control cable, computer cable, BV wire and other products, exported to more than 40 countries and regions around the world, the annual production capacity of 1 billion yuan. 6000 square meters of storage, standing hundreds of millions of inventory, order demand for rapid distribution and delivery, large prices more favorable. Hotline: 16678668098