The highest working temperature can't exceed 70 ℃ , does not exceed 160 ℃ while holding up in 5 seconds, The cable is not limited by the drop when being laid, environmental temperature is not lower than 0 ℃ when laying. Minimum crooked radius of the cable while laying: It is in single core cables 20( D + d), mm, multicore cable( D + d), because mm,( d respectively from cable and actual external diameter of conductor in D of 15, If the leading body is not a round, then d =1.13 √S.S take as the leading factor body marked and claims the section, unit mm2)

Lay and require insulating and regularly with the performance of the electric wire:
（1） Allow working temperature for a long time:
BV-90, RV-90 type are at the time of using normally, high temperature the most of conductor is 90 ℃. Use as right to use of the cable environment can prevent from hot to mould and flow and permit and reduce insulating situation of resistance, The PVC mixture that can be used in 90 ℃ in succession , base on the premise of always shorten working timing, Its working temperature can be improved to 105 ℃. Other types should not exceed 70 ℃
(2)The temperature of laying of the electric wire is not lower than O ℃ , allow the crooked radius: The person who smallers than 25mm should not be smaller than 4D for the external diameter of the electric wire( D), the external diameter of the electric wire( D) is not smaller than 6D for 25mm and the above person.

Type of the products: HYA- copper and core ethylene hydrocarbon are insulating, LAP protects a layer of urban communication cable HYAC- copper and core polyethylene hydrocarbon synthetically insulatingly, LAP synthesizes the sheath, bearing type urban communication cable HYAC- copper and core polyethylene hydrocarbon are insulating by oneself, LAP synthesizes the sheath, bearing type urban communication cable HYA53- copper and core polyethylene hydrocarbon are insulating by oneself, The urban communication cable HYAT53- copper and core polyethylene hydrocarbon of sheath of vertical bag of steel band of wrinkle are insulating, Packing type urban communication cable of sheath of vertical bag of steel band of wrinkle