Armored cable laying way
1. Buried in the ground:
Buried armoured cable
Buried laying, need to consider whether the cable is vulnerable to external shocks and damage.
(1) if it is not a big impact, it is possible to lay it directly. 
(2) if may have a relatively large impact, but the strength can be controlled in a certain range, can be directly buried armored.
(3) if the external force is greater, it is required to adopt a protective sleeve, which is set on the part (such as through highway).
The advantages and disadvantages of buried cables:
Advantages: laying convenient, saving material and artificial;
Disadvantages: maintenance inconvenience, if you want to maintain, you need to dig soil, only used places that without maintenance, or can accept this maintenance way. Need put yellow sand during buried laying.
2. Installed in the cable trench:
Cable trench laying should pay attention to different voltage levels of cable to be divided into different bracket settings, cable trench itself shall pay attention to drainage measures. And consider measures to prevent mice and other small animals to enter.
3. Cable installation in pipe:
Pipe laying cables, compared to directly buried laying, more convenient for the maintenance and increase the line. The cable is laid in a pipe, can considere spare tube, make preparations for the maintenance and compatibility of the line in the future.
(1)when the pipe laying, the line turning angle is larger, or long straight line distance, consider setting up cable wells.
(2) cable number is small, small line diameter, can use the cable hand well;
(3) cable number is more, larger the line diameter, need to consider setting up cable manhole.
(4) the pipe is now more kinds, such as cast iron pipe, steel pipe, polyethylene pipe, nylon pipe, carbon pipe, etc., you can choose according to need.
4. Installed in the underground tunnel:
For some parts of the city, the underground pipeline is concentrated, it is difficult to layout, then we must build a larger space of the underground corridor. According to different pipeline, considering the safety and reasonable factors to be arranged. The problem that must be taken into account in the tunnel is the fire and moisture.
5. Installed in building inside wall or ceiling;
6. Installed in the bridge frame;
7. Laying in the exhaust pipe;
As the city is currently using mostly one kind of laying method, the cable channel is narrow, the city construction is frequent, for better use of all kinds of terrain, to protect the cable safe operation, this is one of the most reasonable way. Its shortcomings, first, reduce the thermal conditions of the cable, reduce the load flow; two is higher cost of construction.
8. Laying in the water bottom:
armoured cable laying in the water
Requirements of the cable itself has high mechanical strength (strengthen armored), outer sheath waterproof (such as PE sheath), and before the cable laying, should choose the path environment that water flow rate is relatively low, less interference from outside; laied cable should be taken strict protective measures, such as set up nameplate to ensure safe operation.
Directly buried installation should be used with armored and anticorrosive layer cable; in indoor, trench and tunnel laying cables should be used flame retardant (flame retardant) or non flame retardant XLPE cables; to ensure no external mechanical forces, can be used non-armoured cable; vibration area are likely to occur, must use armoured cable. Bear the pressure laying conditions should select steel tape armoured cable; bear tension laying conditions should use steel wire armored cable.

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