电缆地线芯绝缘采用具有抗氧化性能的K型B类低密度聚乙烯。
聚乙烯的绝缘电阻高，耐电压好，介电系数小和介质损耗温度和变频率的影响也小，不但能满足传输性能的要求，能确保电缆的使用寿命。
为了减少回路间的相互串扰和外部干扰，电缆采用屏蔽结构。
具体区别方法：看网线截面，如果是铜色的话，就是铜丝，如为白色，则是用合金以次充好。
合金一般比较脆，容易断，导电性远不如铜丝，很容易在工程施工中造成问题。
线材一般那建议选择标准的485线，其为屏蔽双绞线，传输线不是像网线那样为单股的铜丝，而是多股铜丝绞在一起形成一根线，从而某根小铜丝断掉，也不会影响整个的使用。
Signal cable for mining is a signal transmission tool. General signal cable transmission signal is small, in order to avoid the interference signal, signal cable with a layer of shielding layer, outside package of conductor shielding layer, generally for conductive cloth, woven or copper (aluminum), the bronze shield to ground, external interference signal can be the layer into the earth, and avoid interference signals into the inner conductor interference at the same time reduce the wastage of the transmitted signal.
Crane or forklift should be used for the loading and unloading of cables. It is forbidden to run flat or lay flat. For installation of large cables, cable laying cart should be used to avoid external damage or abrasion caused by manual dragging. If the cable cannot be laid in time for some reason, it should be stored in a dry place to prevent sunlight from exploding and water entering the end of the cable. Note: the installation of wire and cable should be familiar with the performance of wire and cable installation personnel or full-time technical personnel, if there are still unclear matters, ball related technical department or technical department of our factory.
常被用于那些对传输的信号要求很高的场合。
4、产品使用范围：本产品适用于交流额定电压450/750V及以下的动力、日用电器、仪器、仪表、电讯设备，照明电路以及自动化装置的固定敷设，连接用软线，安装用软线以及干扰较强的场合用屏蔽电线。
平方毫米=10A。
5平方毫米=16A或20A。
4平方毫米=25A。
6平方毫米=32A。
10平方毫米=40A或50A。
16平方毫米=63A。
家庭配电选用什么型号的铜芯导线比较好这个问题；选用导线当然是选用有信誉的商户与有信誉的品牌国标铜芯导线。
我个人认为；2.5平方毫米截面积以下（含2.5平方毫米截面积）适宜选用BVV型即双塑单根铜芯导线、4平方毫米截面积以上（含4平方毫米截面积）适宜选用双塑多芯铜芯导线，（说明；是选用7芯的而不是19芯的）。
NH-KYDYD低烟无卤阻燃聚烯烃绝缘和护套耐火控制电缆。
NH-KYDYDP低烟无卤阻燃聚烯烃绝缘和护套铜丝编织屏蔽耐火控制电缆。
NH-KYDYDP2低烟无卤阻燃聚烯烃绝缘和护套铜丝编织屏蔽耐火控制电缆。
ZR-YJV32ZR-YJLV32ZR-YJV33ZR-YJLV33ZR-YJV42ZR-YJLV42ZR-YJV43ZR-YJLV43交联聚乙烯绝缘阻燃聚氯乙烯/聚乙烯护套钢丝铠装动力电缆敷设在高落差地区，电缆能承受机械外力作用及相当的拉力。
RVV电线全称铜芯聚氯乙烯绝缘聚氯乙烯护套软电线，又称轻型聚氯乙烯护套软线,俗称软护套线，是护套线的一种。
主要用于中、轻型移动电器、仪表仪器、家用电器、动力照明等柔性使用场所，可传输控制信号，也可传输动力信号，也适合敷设在桥架和软管中。
自承式电缆识别和长度标记：电缆外表面有**性识别标记，标记间隔不大于1m，标记内容有：导线直径，线对数量，电缆型号，制造厂厂名代号及制造年份，长度标记以间隔不大于1m标记在表面上综合纽绞铁路信号电缆执行标准GB/T。
IA-DJVP2VIA-DJYP2VIA-DJYJP2V本安型、铜塑复合膜分对屏蔽。
IA-DJVP3VIA-DJYP3VIA-DJYJP3V本安型、铝塑复合膜分对屏蔽。
IA-DJVVPIA-DJYVPIA-DJYJVP本安型、编织总屏蔽（铜丝或镀锡丝）。
???? In flame retardant series products, has been successfully used in the oxygen isolation technology, not only 0.6/1 kv polyvinyl chloride insulated and crosslinked polyethylene insulation flame retardant power cable can achieve GB/T12666.5 "into A bunch of power cable test" in class A, and rated voltage up to and including 6/10 kv 8.7/15 kv crosslinked poly (flame retardant power cable can reach A high class A demand and A large margin. On the basis of high flame retardant and high flame retardant cross-linked insulation, a low-smoke halogen-free high-flame retardant oxygen insulation layer power cable was added, and its low-smoke halogen-free performance was in line with GB/T17651.1.2 and GB/ t In this way, the overall level of the company's cross-linked power cable is lower than the domestic status. This company produces the type refractory power cables for rated voltage 0.6/1 kv copper core cable, can also produce low smoke zero halogen fire-resistant power cable, high flame retardant fire-resistant power cable oxygen insulation layer, the fire-resistant performance in line with the GB/T12666.6 cable fire resistance test. Therefore, the overall performance of refractory series power cables is good and reliable. The water resistance performance of fireproof cable conforms to iec 502-2.
RC滤波电感器的成本高、体积大，在电流不太大的电子电路中常用电阻器取代电感器而组成RC滤波电路。
同样，它也有L型；π型。
稳压电路交流电网电压的波动和负载电流的变化都会使整流电源的输出电压和电流随之变动，要求较高的电子电路必须使用稳压电源。
稳压管并联稳压电路用一个稳压管和负载并联的电路是最简单的稳压电路。
R是限流电阻。
这个电路的输出电流很小，它的输出电压等于稳压管的稳定电压值VZ。
产品采用标准：MT818. 矿用通信电缆规格型号，产品名称及作用MHYV(1×2矿用通信电缆：用途:本产品用于井下作通信焊线、配线和用户线路。
使用条件:电缆使用环境温度为－40℃～+50；在25℃时湿度为95%；电缆敷设温度≥－10℃；电缆敷设时的弯曲半径MHYV≥10倍电缆外径，其余型号≥15倍电缆外径。
The fundamental characteristic is that it may burn out and not run in the case of fire, but it can spread fire. Generally speaking, in case of electric wire fire, it can be put in the local scope, not to produce spread, keep other kinds of e, avoid causing greater loss.