UL extension line has long-term overload operation and full load operation. Due to the thermal effect of current, the conductor will heat up when the load current passes through the cable. At the same time, the skin effect of charge, eddy current loss of steel armor and dielectric loss of insulation layer will also generate additional heat, which will cause the ambient temperature of cable to rise. During long-term full load operation, high ambient temperature will accelerate the embrittlement of the insulation layer, and even the insulation layer will be penetrated. Especially in the hot summer, the temperature rise of the cable often leads to the first penetration of the weak foundation of the cable insulation layer, so in summer, there are many common faults of the cable.

UL electronic wire

There are many UL electronic wires in common use, and the difference mainly depends on the insulation layer and sheath material. According to the insulation layer and sheath material is different, the main dividend PVC electronic wire / low smoke halogen-free electronic wire / silicone wire / Teflon electronic wire, etc. The cost of UL electronic wire mainly includes copper price cost and rubber cost, so the cost of electronic wire = copper price cost + rubber cost.

UL electronic wire flexible mineral insulated cable is the combination of the advantages of plastic cable, and "fire prevention" is only one of its visualized functions. Non combustible, flexible, explosion-proof, anti-corrosion, waterproof, antimagnetic, anti mechanical damage (including animal bite), large carrying capacity, strong overload capacity, etc., the actual effect of any function is far better than that of plastic cable. And has a very good explosion-proof, can block the steam flame in the cable connecting parts between each other. Moreover, its diameter is smaller than that of other cables with opposite rated current. It also has the function of waterproof. It is especially stable and durable. It can be destroyed by violent machinery and equipment without destroying other electrical functions.

UL electronic wire is damaged by external force. According to the operation analysis in recent years, especially in the rapid development of economy, many cable faults are caused by the common faults of cable joints caused by mechanical damage. The cable joint is the weak foundation stage in the cable line. The common faults of the cable joint caused by the staff's immediate fault (poor construction) often appear. In the process of manufacturing cable joints, if there is a joint crimping is not tight, heating is not enough and other original network, one cut will lead to the reduction of cable head insulation layer, and then cause accidents.