电线电缆的质量就直接影响着我们的生活。
The quality of wires and cables directly affects our lives.
不合格的产品，主要问题存在于结构、导体尺寸、导体电阻、绝缘和护套老化前抗张强度，消费者使用了这样的产品，极易发生漏电、触电甚至是起火的危险，这些劣质产品给电力系统正常运行埋下诸多隐患。
The main problems with unqualified products lie in their structure, conductor size, conductor resistance, tensile strength of insulation and sheath before aging. Consumers who use such products are prone to the risk of leakage, electric shock, and even fire. These low-quality products pose many hidden dangers to the normal operation of the power system.
一、电线电缆有发生单相接地（短路）事故后，继电保护装置因未动作切断故障而引起电线电缆过热导致绝缘层自燃。
1、 After a single-phase grounding (short circuit) accident occurred in wires and cables, the relay protection device failed to cut off the fault, causing the wires and cables to overheat and causing the insulation layer to self ignite.
二、护套式绝缘老化前的抗张强度、伸长率合格的电线电缆。绝缘护纤维 驱鸟设备 保定通风管道 塑料土工格栅 检查井模具 流水槽模具 锻造厂家 华尔街铜牛套老化前的抗张强度、伸长率不合格直接大大缩短电线电缆的工作使用寿命，而且在施工或在长时间通电且温度较高的环境中，极易出现绝缘体断裂，致使带电导体裸露，发生能触电式短路危险。
2、 Wire and cable with qualified tensile strength and elongation before aging of sheathed insulation. The unqualified tensile strength and elongation of the insulation sheath before aging directly shortens the working life of wires and cables. Moreover, during construction or in environments with prolonged electrification and high temperatures, insulation breakage is prone to occur, resulting in the exposure of live conductors and the risk of electric shock in short circuits.
三、导体电阻不合格的电线。导体电阻主要是考核电线电缆的导体材料以及截面是否符合的重要指标。当导体电阻超标时，就增大了电流在线路上通过时的损耗，加剧了电线电缆的发热。导体电阻不合格的原因，主要是企业为了降低成本，将占原材料成本80%的铜材缩水，要么降低导体的截面积，要么使用含杂质过高的再生铜，这样致使电线电缆的导体电阻严重超标，在使用过程中除易引发火灾，还会加速包覆在电线外的绝缘层的老化。
3、 Wire with unqualified conductor resistance. The conductor resistance is mainly an important indicator for assessing whether the conductor material and cross-section of wires and cables meet the requirements. When the conductor resistance exceeds the limit, it increases the loss of current passing through the line, exacerbating the heating of wires and cables. The main reason for the unqualified conductor resistance is that enterprises shrink the copper material, which accounts for 80% of the raw material cost, in order to reduce costs. They either reduce the cross-sectional area of the conductor or use recycled copper with high impurities, which causes the conductor resistance of wires and cables to seriously exceed the standard. In addition to easily causing fires during use, it also accelerates the aging of the insulation layer wrapped around the wires.