Fire resistant cable is a cable that can keep a safe running time in the case of flame combustion. China's national standards GB12666.6 (IEC331) fire test were divided into a, B two level, class a flame temperature 950~1000 DEG C, sustained for fire time 90min, grade B flame temperature 750 ~ 800 DEG C, sustained for fire time of 90 min, during the experiment, samples should be under the product requirements of rated voltage value. Fire resistant cable is widely used in high-rise buildings, underground railway, underground street, large power and an important industrial and mining enterprises and other places related to fire safety and fire rescue, for example, fire-fighting equipment and emergency guide lamp emergency facilities of the power supply circuit and control circuit.

1 AC rated voltage: U. /U (V series: 600/1000V, K series: 450/750V, B series: 450/750V).

2 long working temperature of cable

(1) the insulation and sheath of the resistance of vinyl fluoride: 70 degrees C and 105 degrees C; cross linked polyethylene insulation: 90;

(2) fluorine plastic insulation and sheath: 220 degrees C and 260 degrees C, two kinds of fluorine plastic insulation and 105 degrees Celsius flame retardant polyethylene sheath: 90 and 125.

(3) low halogen, low smoke, flame retardant PVC insulation and sheath: 70 degrees C; halogen free low smoke flame retardant polyolefin insulation and sheath: 90 and 125.

3 minimum ambient temperature:

(1) flame retardant PVC insulation and sheath: fixed -40;

(2) fluorine plastic insulation and sheath: fixed laying -60 C; non fixed laying -20;

4 the temperature of cable laying should not be less than 0.

5 fire resistance characteristics:

Comply with IEC331 requirements in accordance with the provisions of GB12666.6

Flame temperature 750 degrees Celsius flame temperature 950 C -1000 C flame temperature 750 C -800

Combustion time 90min combustion time 90min combustion time 3H

Cooling time 21h additional voltage rated voltage additional voltage rated voltage

Additional voltage rated voltage additional current 3A additional current 3A

Additional current 3A a class B class

6 laying recommended bending radius: non armoured braid shielded cable should not be less than 6 times of cable diameter;

Steel armored cable should not be less than 12 times of cable diameter;

Fluorine plastic insulated and sheathed cable shall be not less than 8 times the diameter of the cable.