Special Mic What are the requirements for outdoor circuit lamp connection to the city circuit lamp installation process?
1. Steps of the installation process of city circuit lamps
The city circuit lamp consists of the lamp head (light source), light pole, embedded parts, mixed soil foundation, lightning -absorbing corner iron, PVC Tube, wire, cable, control box (time and space switch, exchange contactor, leakage protection device) and other parts.The installation process steps are: basic positioning basic pouring construction cable protection groove slot slot threading pipe support threading cable protection groove backfill lamp wiring street light control installation:
1. Basic positioning
The survey address is determined to determine the position of the light pole. At the same time, there is no cable, pipeline and other facilities below the excavation location. Based on the above, the high -voltage wire must be avoided, and the leaves are used to avoid the safety of the leaves to ensure the safety of construction.
2. Basic pouring construction
Dig a basic pit with the corresponding size according to the drawings, then enter the lightning -absorbing angle iron, use the concrete to enter the cushion, and then fix the embedded parts; finally put two in less than less than 30mm arc -shaped threading Tube, the threading Tube of the threading Tube, and the threading Tube.One end is placed in the center of the four screws of the embedded parts, one of which comes in in the direction of the main cable, and the other one ends in the direction of the main cable.
3. Cable protection groove slot
In the case of cement pavement or street road surface, a cable protective groove should be dug into the cement slot. The depth of the slot should be determined according to the actual situation.
4. Circuit Tube supplement
The thread is generally used for cables. One end is fixed on the guidance steel wire. The piercing rod is introduced. On the basis of embedding, there is -shaped semi -circular, which is used for wiring.The length of each round line is determined.
5. Cable protection groove recovery
The hidden project can be filled in the cable protection groove after confirming the qualification, and the layered landfilling when the backfill is returned.
6. lighting assembly
Divide the light rod to each foundation, and assemble the light rod arm on the side of the road parallel. Do not scrape the wire in the light rod during the thread to protect the cortex;Adjust the parallel degree of the light surface and the parallel surface of the light head and the elevation of the light head, and try the temporary power supply.
7. Establishing rod wiring
The vertical rod is divided into two types: artificial vertical rod and mechanical vertical rod. Pay attention not to press the French disk to the wire and cable to prevent the leakage of the Skin.Do not touch the surrounding high -voltage lines or other buildings when standing.Add the cushion under the buried nut and use nuts to fasten.Effect the light rod, the light pole must be perpendicular to the road surface.Then faste the pads of the lightning -absorbing angle iron, and the conditions are allowed to be welded to ensure that the light rod is connected to the pile with the lightning corner.Do a good job of connection between the main cable and the wire in the light rod, and do a good job of waterproof treatment. The phase wire of each lamp should be installed with a fuse. The fuse should be fixed., The upper end of the fuse should be connected to the wire, the lower end is connected to the power supply, and the lamp rod is connected to the ground wire at the same time.
8. Street light control installation
Street light control box components include leakage protection, timing microcomputer switches, AC contactors, separation switches, and electric meters. Check whether the connection is correct and whether the wiring is firm., Finally connect to the distribution box to connect the ground wire.
After the above steps, the rust -proof processing of the street light rod can be embedded in the street light rod. If the conditions are conditional, add an additional nut fastener. After the liquid asphalt is brushed, the city circuit light is installed.
2. What are the requirements for Outdoor street lights?
1. The protection of Outdoor street lights is divided into TT and TN systems, of which the TN system is divided into TN-C, TN-S, TN-C-S system.
2. The TT method refers to the protection system that directly grounds the metal shell of the street lamp steel rod, commonly known as single Lights.When the metal shell of the street -lamp steel rod is charged, the danger of electric shock is reduced by a low -voltage section. It is suitable for places where ground protection is very scattered. At present, it is rarely used.
3. The TN method of power supply system is the protection system that connects the metal shell of the street light steel rod with the working zero line. It is also known as the zero protection system of the street light connection. Once the device appears, the zero protection system can raise the leakage current to a short -circuit current to a short -circuit current.This current is very large, which is 5.3 times the TT system. In fact, it is a relatively short -circuit failure. The fuse of the fuse will melt.Safety.
4. The welding of the ground wire should comply with relevant regulations: flat steel is twice the width of its width, and at least 3 edges are welded. The round steel is 6 times the diameter. When the round steel is connected to the flat steel, the length of the round steel is round steel.6 times diameter.
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