For high-rise buildings, oil fields, power plants, power plants, mining, chemical, mine, subway and other requirements where a high fire conditions, but also emergency power supply, fire pump, elevator communication signal system should be prepared cable, the product has a high fire ability to withstand direct flame burning in the case of a certain period of time (not less than 3h) is not a short circuit and open circuit failure, to ensure continued supply to maintain the light and transmit signals to protect the safety of staff have enough time to evacuate, and help fire fighting and reducing losses. 


 ■ Standard: enterprise standard 

 ■ use features: 
 1, the power frequency rated voltage U0 / U: 0.6/1kV. 
 2, of the conductor to allow long-term working temperature: 
 Flame-retardant PVC: 70 ℃ / 105 ℃. 
 XLPE: 90 ℃ 
 3 The ambient temperature should be not less than 0 ℃ 
 4, the cable bend radius: 
 Power Cable: Single cable ≥ 40D, multi-core cable ≥ 30D control cable: ≥ 12D 
 B series plastic wire: ≥ 4D (when the cable diameter is less than 25mm), ≥ 6D (when the cable diameter greater than 25mm) 
 5, fire-resistant than the cable diameter: 25mm2 cross section less than the average size of similar types of products is 15% more than 25mm2 cross section similar products specifications than the average 25% larger. 
 6, the product of electrical performance, mechanical properties, the same carrying capacity and general product 
 7, the fire resistance test standard using IEC331 or GB12666.6