五：代号名称和含义表2代号代号含义YVF丁腈电缆系列P铜编织屏蔽R多股绞合导体六：主要技术指标1．成品电缆导体(R类)直流电阻(符合GB3956规定)参照附录A表2。2．20℃时绝缘电阻不小于50MΩ/KM。
7、型号及名称：KVV铜芯聚氯乙烯绝缘聚氯乙烯护套控制电缆 索道通信电缆执行标准：YD/THYAC_索道电缆--索道通信电缆用途：HYAC-索道电缆--索道通信电缆适用于索道的通信线路，也适用于接入公用网上网专用网线路。
Computer cable sheath: one, the scope of application: this product is fit for ac rated voltage up to and including 300/500 v or 1000 v dc electronic computer network and automation control system of signal transmission, high anti-jamming performance requirements of the detection device and instrument connections. Second, implement standard SPTL/QB2002.10-01 three, use features: 1. The cable conductor of long term working temperature should be allowed no more than 70 ℃, in the process of using cable should prevent high temperature radiation or contact; Ambient temperature under installation should not below 0 ℃. 2. Allowable bending radius of cable laying and installation: non-armoured layer cables shall be no less than 6 times the outer diameter of the cable; The armoured or shielded cable shall not be less than 12 times the outer diameter of the cable. The soft cable of shield layer structure should not be less than 6 times the outer diameter of the cable.
Armored communication cable mechanical protection layer: type 53 adopts 0.15mm thick corrugated steel belt, which is longitudinal wrapped on the basic cable and overlapped on both sides. The surface of the steel belt is coated with plastic to prevent corrosion and water intrusion.
矿用信号电缆本产品用于作煤矿井下监测、控制系统中低频信号传输线。执行标准：企业标准参照采用MT818.14－1999 。产品在全国几十个煤业集团及矿山上使用，获得了较高的评价和赞誉。耐火控制电缆用途：本产品具有较高的耐火能力，能经受火焰直接燃烧且在一定时间内不发生短路或断路故障，在火灾发生时，有利于灭火及减少损失。
但尽管如此，还是可能会引起漏电开关的误动作。这些地方不能用漏电正是由于漏电开关的这两个特点，以下几种地方不能使用漏电开关：1.主开关——漏电开关只能作为电网中最后一级支路开关，而不能作为主开关使用。个别场合需要检测漏电，可以使用漏电报警不跳闸的开关。但是单一设备使用的漏电，不算一级。比如空调使用了一个专用的漏电开关进行保护，此时不影响空调所在回路再用一个漏电开关。一般照明回路——一般照明回路不能用漏电开关，一来是因为LED在工作时容易造成漏电开关误动作；二来一旦电路中出现漏电，就导致所有照明灯具关闭，不利于危险逃生。
公司主营产品：电力电缆 控制电缆 计算机电缆 市内通信电缆 电线电缆我们专业从事电线电缆的生产及销售.我们的产品****,种类齐全,有各式电线电缆,国内订购均可配送.我们将以最优质的服务达到您的满意.天津市电缆总厂第一分厂销售中心销售区域：上海，广东，广洲，长沙，西安，太原，南昌，呼和浩特，银川，成都。
电动葫芦电缆-电动葫芦专用电缆-电动葫芦带丝绳专用电缆使用特性:额定电压：U0/U0.6/1KV及以下最高工作温度：100℃最低环境温度：固定敷设-40℃。在交联聚乙烯绝缘高阻燃的基础上又开发了低烟无卤高阻燃隔氧层电力电缆，其低烟无卤性能符合国家标准GB/T17651.1.2和GB/T17650.1.2。
因为RS485接口组成的半双工网络，一般只需二根连线，所以RS485接口均采用屏蔽双绞线传输。在使用RS485通讯时，对于特定的传输线路，主机（召测设备）到仪表的485口间的电缆长度与数据信号传输的波特率成反比；这个长度主要受信号的失真以及噪声的影响所影响。
The sequence table of 200 pairs of communication cables (log-log cables) shows that there are 4 kinds of marking lines in 100 pairs of communication cables. The first 25 pairs are wrapped with the marking line of "bailan". The second 25 pairs are wrapped in "white orange" lines! The third 25 pairs are wrapped in "white and green" lines! The fourth 25 pairs are wrapped in "white brown" lines! The fifth 25 pairs are wrapped in a "white grey" logo line! The sixth 25 pairs are wrapped in a "red orchid" logo line! The seventh of the 25 pairs is wrapped in a red orange logo line! The eighth 25 pairs are wrapped in "red and green" lines! Manufacuring HYA; HYA22; HYA23; HYA53; ZRC - manufacuring HYA; ZRC - HYA53HYAT; HYAT23; HYAT53; HYAT22; HYYT; ZRC - HYAT; WDZ - HYAT; ZR - HYAT53; ;
Eisc-ss flame-retardant and explosion-proof essential cable eisc-ss-r flame-retardant. The main technical indicators of this company are compiled by referring to the information of IEC227 (1979) and British BS5308Part1. Purpose: this product is mainly used for laying places of essential requirements with rated ac voltage of 450/750v or less, strong anti-rf and anti-near field coupling ability. It is also suitable for distribution and transmission of essential circuits in industrial sectors with gas operation. Conditions of use: 1)? The rated voltage is 450/750v. 2)?? Cable conductor long-term allowed working temperature is 70 ℃. 3)?? The cable temperature under installation should not below 0 ℃, allowed recommended no armoured cable bending radius should not less than 6 times of cable diameter. The armored cable shall not be less than 12 times the outer diameter of the cable.
计算机电缆技术参数：产品额定电压(U0/U):300/500V长期工作温度为70℃敷设时环境温度不低于:固定敷设-40℃,非固定敷设-15℃最小弯曲半径：无铠装层应小于电缆外径的6倍，带铠装层的电缆应不小于电缆外径的12倍在20℃时用直流500V电压试验稳定充电1min后绝缘电阻应不小于2500MΩ。
作为电工大军的一员，清楚的记得师傅带进门一个教的口诀便是“左零右火”并且要死记背下来。果然，在电工这条路上有着很大的帮助。但是仍有许多人不知道，接错的时候在一定程度上也没多大的影响，其实这样的想法很是不好，接错了危险可大了。像家里使用的排插或者是安装的插座，一般两孔的没有零火线区分，所以并不存在危险情况，而且都有外壳保护着危险性也较小。但是要是像墙上的插坐三孔的，火线和零线接反的话，那就危险了。我们假设家里使用的插排上带一个小开关的话，当大家把开关断开时，但这个插排还是带电的。
Coaxial cable with hard copper wire as the core, outsourcing a layer of insulation materials. The insulating material is surrounded by tightly woven network conductors and covered with a protective material. There are two widely used coaxial cables. One is the 50 ohm cable, which is used for digital transmission. The other is the 75 ohm cable, used for analog transmission, or broadband coaxial cable. This distinction is made for historical reasons, not for technical reasons or manufacturers.
型号及名称2271EC52（RVV）铜芯聚氯乙烯绝缘聚氯乙烯护套（圆型连接软电线）2271EC52（RVV）主要技术参数标称截面芯×（mm2）线芯结构芯×根/直径电线参考数据外径（mm）重量（kg/km）20℃时导体电阻（Ω/km）不大于下限上限2×0.52×16/0.2。
矿用通信电缆2、绝缘材料：高密度聚乙烯或聚丙烯，按照全色谱标准标明绝缘线的颜色。3、绝缘线对：把二根不同颜色的绝缘线按不同的节距扭绞成对，并采用规定的色谱组合以便识别线对。4、通信电缆缆芯结构：以1对为基本单位，超过25对的电缆按单位组合，每个单位用规定色谱的单位扎带绕扎，以便识别不同的单位。
电缆规格如下：表2型号额定电压（U0/U）对数标称截面（m㎡）DJYVPDJYPVDJYPVPDJYVRPDJYPVRDJYPVPRDJYVP22DJYPV22DJYPVP22450/7501，2，3，4，5，6，7，8，10，12，14，16，19，240．75，1．0，1．5技术要求。