This product is suitable for high-rise buildings, oil fields, power stations, power plants, mines, chemical plants, subways, and other occasions requiring high fire protection conditions. It is also an essential cable for emergency power supplies, fire pumps, and elevator communication signal systems. This product has high fire resistance. Under conditions of direct flame burning, it will not experience short circuits or open circuits within a certain period (not less than 3 hours), ensuring continued power supply to maintain lighting and transmit signals, protecting personnel with enough time to evacuate safely, and helping to extinguish fires and reduce losses.

I. Production Implementation Standards: Enterprise standards are adopted.
II. Conditions of Use:

1. AC rated voltage: U0/U (V series: 600/1000V, K series: 450/750V, B series: 450/750V).

2. Maximum long-term working temperature of the cable:
   ① Flame-retardant PVC insulation and sheath: 70°C and 105°C;
   ② XLPE insulation: 90°C;

3. The installation and laying temperature of the cable should not be lower than 0°C.

4. Recommended allowable bending radius for laying: Power cables: Single-core cable ≥ 40D; Multi-core cable ≥ 30D. Control cables: ≥ 12D. B series plastic wires: ≥ 4D (when D < 25mm); ≥ 6D (when D ≥ 25mm).