First of all, we need to understand the wire used for monitoring. The common surveillance cameras are used for video and power lines. The webcam is powered by direct POE. For far away, no matter analog or network surveillance cameras, optical fiber is needed. We monitor the project mostly using single mode fiber.

下面说说各种线材。

Here are all kinds of wire.

通常模拟监控用的视频线，就是同轴电缆，用来传输模拟视频信号。型号通常有SYV75-3，SYV75-5，这两种规格线径不同，传输距离也不一样。75-3传输距离200米左右，75-5传输距离500米左右，再远的距离建议用光纤。

Usually the video line used for analog monitoring is coaxial cable, which is used to transmit analog video signals. The models usually have SYV75-3 and SYV75-5. These two specifications have different line diameters and different transmission distances. 75-3 the transmission distance is about 200 meters, the 75-5 transmission distance is about 500 meters, and the farther distance is recommended to use optical fiber.

监控使用的电源线一般使用RVV2*1.5，RVV2*1.0，RVV2*0.5的两芯线，RVV电线全称铜芯聚氯乙烯绝缘聚氯乙烯护套软电线,俗称软护套线，是护套线的一种。一般根据距离及功率选择电源线的线径。

The power line used for monitoring and control generally uses the two core lines of RVV2*1.5, RVV2*1.0 and RVV2*0.5, and the RVV wire is fully called the copper core PVC insulated PVC sheath soft wire, commonly known as the soft sheath line, and is a kind of sheath line. Generally choose the diameter of the power cord according to the distance and power.

网线正常用的是非屏蔽超五类双绞线，传输百兆带宽信号，网线传输正常100以内，再远会丢数据包。

The normal use of the network cable is the non shielding super five kinds of twisted pair lines, transmitting 100 Gigabit bandwidth signals, and the network transmission is within 100 normal, and then far away will lose packets.

光纤现在无论模拟监控还是网络监控，长距离都要用到，监控工程一般采用的单模光纤，传输距离可以几十公里，传输信号稳定。布线的时候不能拐死弯，就是说拐弯半径一般都在20cm以上才可以，防止折断。

Optical fiber is now used in both simulation monitoring and network monitoring, and the long distance is used. The single mode optical fiber is used to monitor the engineering. The transmission distance can be tens of kilometers, and the transmission signal is stable. Do not turn dead bend when wiring, that is, the turning radius is generally above 20cm, so that it can prevent breaking.

线材敷设方法和注意点：

Wire laying methods and points of attention:

监控室外布线可以架空、沿墙或者地埋的方式。

Monitoring outdoor wiring can be built along the wall or buried.

监控室内布线一般使用线槽或者桥架，普通的监控工程室内都是使用的线槽，大型监控室内就需要用到桥架。

Monitoring indoor wiring generally use line slot or bridge, ordinary monitoring engineering room is used in the slot, large monitoring room need to use the bridge.

无论哪种方法都必须使用线管穿线，一定要尽可能地保护线材，一方面延长线材使用寿命，另一个方面为了布线美观。

No matter which method must use line tube to wear line, we must protect the wire as much as possible, on the one hand, prolong the service life of the wire, and the other one is to make the wiring beautiful.

另外提几个注意点，

In addition to several points of attention,

1，监控布线一点要提前选择适合的线材，要既能保证电压稳定也不影响摄像机正常工作。

1, monitoring wiring must select suitable wire in advance, so as to ensure voltage stability and not affect the normal operation of the camera.

2，布线路线要注意周边环境，避开强磁场的干扰，有干扰要布置屏蔽线。

2, the wiring must pay attention to the surrounding environment, avoid the interference of strong magnetic field, and arrange the shielding line if there is interference.

3，监控布线一定要把强电和弱电分开布线，各自管路走线，防止强电干扰。

3, monitoring wiring must separate the strong power and weak current separately, line up the respective pipelines, and prevent strong electricity interference.

4，视频线中间不能有端节点。电源线中间也尽量不要出现接续点，万一有必须设置过线盒。

4, there is no end node in the middle of the video line. In the middle of the power cord, try not to have a connecting point. If there is a wire box, it must be set up.

5，监控布线两端必须做好标记，方便调试工作已经日后的维护检修。

5, monitoring wiring must be marked at both ends to facilitate debugging work has been maintenance and repair in the future.

了解这些基本知识和注意事项，做完监控工程的施工就不会出现一系列调试的麻烦了。

Knowing these basic knowledge and matters needing attention, after completing the construction of monitoring engineering, there will be no trouble of debugging.