Purpose: the self-supporting non-filled cable is suitable for the urban and township telecommunication lines of local telecommunication network, and also for the special network lines connecting to the public network. It is economical and practical to use the same outer protective layer for hoisting line and cable. The mechanical and electrical properties of the cable remain unchanged under conditions of 30~C - 60~C. Structure: wire: annealed bare copper wire, copper wire diameter is 0. 4, 0. 50, 0. 60, 0. 70, 0. 80, 0. 90 mm. Insulating material: high density polyethylene or ethylene-propylene copolymer. The color of the insulated wire is in accordance with the full chromatographic standard. Pair of insulated wires: two different colored insulated wires are twisted in pairs according to different pitch and are identified by a specified chromatographic combination. Core structure: with 25 pairs as the basic unit, more than 25 pairs of cables are assembled according to the unit, each unit is wired with the unit of specified chromatogram to identify different units. 100 pairs or more of cables plus 1% of the reserve pair. Core tape: wrap with a polygrease film tape. Shielding: the two sides are overlapped with or without corrugated metal strip, beyond the cable core of the longitudinal capsule. The plastic film coated on the surface of the shielding belt and the bonding sheath of the protective layer: black low density polyethylene. Hoisting line: the hoisting line is 7 strands of galvanized steel strand, nominal outside diameter is 6. 3 and 4 mm. The tensile strength of two types of 75mm is not less than 3000kg and 1800kg respectively. The suspension wire is coated with thermoplastic paint to prevent the steel wire from corrosion. Identification and length marking
Low smoke zero halogen type refractory in addition to meet the low smoke zero halogen flame retardant, the performance of the fire test should be passed GB/T under the condition of the flame or the stipulations in the optical cable circuit integrity experiment, at 750 ℃, 90 min, 2 a fuse fusing.
电缆的型号：ZR-YJVZR-YJLVZR-YJYZR-YJLYZR-YJV22ZR-YJLV22ZR-YJV23ZR-YJLV23ZR-YJV23ZR-YJLV23ZR-YJV33ZR-YJLV32ZR-YJLV33适用范围：本产品适用于工频额定电压3.6/kV-26/3。
3、产品型号、名称及使用范围型号名称使用范围YFF聚氯四氟绝缘、聚四氟护套仪表用电缆固定敷设，用于仪器、仪表的连接YFFP聚四氟烯绝缘、聚四氟护套仪表用屏蔽电缆同上，用于要求抗干扰的情况下RFF聚四氟绝缘、聚四氟护套仪表用软电缆用于要求柔软的场合RFFP聚四氟绝缘、聚四氟护套仪表用。
电缆名称—-计算机电缆 :电缆屏蔽—-铜丝编织屏蔽P—-铜带屏蔽P2—-铝塑复合带屏蔽P3电缆绝缘—-聚氯乙烯V—-聚乙烯Y—-交联聚乙烯YJ—-氟塑料F、F46电缆铠装—-钢带铠装22、23—-钢丝铠装32、33、42、43电缆导体—-单根导体A—-7根导体B—-多根导体R电缆阻燃—-普通阻燃ZR。
今天我们在厂区换灯的时候看到一个同事打下空气开关后因为懒得拆线就用尖嘴直接把电缆剪断，你们认为这样剪电线是否正确。
好像这样剪并没有错，空气开关都已经打下来了，平常很多人也都是这样剪，实际上这样剪线是比较危险的。
有次我也在换一盏室外功率为55W的彩灯，因为原来的线是在灯壳里面接的，手上也有电笔但验不了电，除非把灯壳拆开。
想想反正空气开关也打下了应该不会有电了，嫌麻烦就直接用尖嘴钳把电缆剪断，那一剪可使我终生难忘啊？直接听到一声爆炸声，眼前就像在漆黑的夜晚忽然打雷一样两眼看到一道白光。
Converter cable shielding structure design: frequency conversion motor 1.8/3 kv and below special cable shielding generally adopt total shielding, frequency conversion motor of 6/10 kv dedicated cable shielding consists of split phase mask and the total shielding, shielding can generally be split phase adopts copper tape screened or copper wire copper strip composite shielding.
100对及以上线对的电缆加有1％的预备线对，但最多不超过6对。
缆芯内的间隙用石油膏填充。
5、缆芯包带：用聚脂薄膜带绕包。
6、屏蔽：铜丝屏蔽或用轧纹（或不轧纹）金属带，金属带纵包于通信电缆缆芯包带之外。
7、护套：蓝色低密度聚乙烯。
多年的“计算机电缆R;DJYPVPR22;DJYPVPR32;DJYJPV,DJVPVP,DJYPVP,DJYJPVP电子计算机电缆DJYVPR;D。
2.使用特性1额定电压U0/U为300/500V及以下。
Fire control cable USES: this product has high fire-resistant ability, can withstand direct flame combustion and in a certain period of time not short circuit or open circuit fault occur, when the fire broke out, to put out the fire and reduce the loss. It is suitable for electric devices and control systems in places with high fire risk and fire control importance. Product standard: Q/ 320831nhn℃ ~ + 105 ℃ and 60 ℃ ~ + 200 ℃. Two kinds of refractory characteristics: comply with GB: A class: the flame temperature of 950 ℃ to 1000 ℃ class B: flame temperature 750 ℃ to 800 ℃ the burning time of 90 min burning time: 90 min additional voltage 500 v 3 additional voltage 500 v 3 A current a. flame retardant properties: Comply with class A of gb test • minimum allowable bending radius of cable: The armoured not less than 12 times the cable diameter models: main material PVC insulated PVC sheathed low smoke low halogen low smoke zero halogen sheath insulation fluorine plastic insulation Low smoke low halogen sheath fluorine plastic insulation Low smoke zero halogen sheath fluorine plastic insulation fluorine plastic sheath Single strand conductors without shielding NH - KVV NH - KV D Y D NH - KFV DNH KFY D NH - KFF single strands of copper conductor shielding NH - KVVP NH - KV D Y D P NH - KFV D P NH - KFY D P NH - KFFP single stranded conductor copper tape screened NH - KVVP 2 NH - KV D Y D P 2 NH - KFV D P 2 NH - KFY D P 2 NH - KFFP 2 soft conductor shielding NH - no KVVR NH - KV D Y D R NH - KFV NH - KFY D D R R NH - KFFR soft copper conductor shielding NH - KVVRPNH - KV D Y D RP NH - RP NH - KFY KFV D D RP NH - KFFRP no shielding NH - steel tape armoured KVV NH - 22 KV D Y D - 22 NH - KFV NH - KFY D - D - 22 of 22 NH - KFF 22 note: PVC insulation structure by using the 105 ℃ resistance fuel used for refractory compound insulation structure. Specifications: Section 0.5 0.75 1.0 1.5 2.5 4 June 15 mm 2 above and below 2.5 mm 2 class A 1/0.80 1/1.13 1/1.13 1/1.38 1/1.38 1/1.13 1/1.13 PVC fluorine plastic sheath PVC fluorine plastic sheath class B 19/0.1 19/0.2 19/0.2 19/0.3 19/0.3 19/0.2 19/0.2 4-2-2-61 core 37 core 27 Core 4-14 core technical indicators: Performance can project technical indicators conductor dc resistance (20 ℃) or less Ω/km nominal section 0.5 0.75 1.0 1.5 2.5 4 6 class A 36.0 24.5 18.1 12.1 7.41 4.61 3.08 39.0 26.0 26.0 13.3 7.98 4.95 19.5 B test voltage 3000 V / 5 min not breakdown insulation resistance M Ω 1000 km or more refractory characteristics through the class A, Class B (according to gb test) passed class A (according to gb test).
在一定条件下，也可用于传输2048Kbit／S以上的数字信号。
在一30℃～+60℃的环境条件下，电缆保证长期、可靠的运行。
结构导线：铜线直径为、0．40、O．50、O．60、0．70、O．80、O．90mm。
为了提高电缆的质量，我们选择高电性能绝缘材料生产，例如1.8／3千伏变频电机专用电缆，采用10千伏交联绝缘材料，6／10千伏变频电机专用电缆采用35千伏交联绝缘材料，导体屏蔽、绝缘屏蔽和绝缘材料均采用了进口材料。
}}}我们要讨论解析后我们数据存储的问题，其实在资源比较足够的情况下或者能够挤出data区的情况下可以考虑用结构体，我们构造好相应结构体，将接收到的数据存储进去，要应用的时候就十分方便。
但这也有个矛盾，一般c51定义的结构体都被存储在data区，一般通讯的字节量大空间必然不够，存在一个矛盾，可以采用联合体union进行存储效果会好一点。
当然也可以在保存数据时采用定义在xdata区（片外）的buffer来存储。
ZR-KVVP2阻燃聚氯乙烯绝缘，阻燃聚氯乙烯护套铜带绕包屏蔽控制电缆同上。
ZR-KVV22阻燃聚氯乙烯绝缘，阻燃聚氯乙烯护套内钢带铠装控制电线敷设在室内、电缆沟中、管道内及地下，能承受较大的机械外力使用。
填充材料填充式电缆应在缆芯的间隙及缆芯与包带的间隙均匀而连续地填满符合规定的填充复合物。
缆芯包带缆芯包带用具有足够的隔热性能和机械强度的绝缘带重叠绕包。
以防导体绝缘在加屏幕和挤出挤套过程中粘接、变形和损伤。