1. Poor construction quality
The proportion of faults caused by construction quality is relatively high. The main manifestations are: firstly, the depth of the cable trench is not enough, and the construction of sand covered bricks is not carried out according to standards; The second issue is that the production and installation of the aisle duct do not meet the requirements, and the two ends are not made into mouthpieces according to the standard; Thirdly, when laying cables, drag them on the ground; The fourth issue is that the pre embedded pipes in the foundation are not constructed according to standard requirements, mainly due to the pre embedded pipes being too thin, coupled with a certain degree of curvature, making it quite difficult to thread cables, resulting in “dead bends” at the bottom of the foundation; The fifth issue is that the thickness of the wire nose crimping and insulation wrapping is not sufficient, which can lead to short circuits between phases after prolonged operation.
2. Materials not up to standard
From the troubleshooting situation in recent years, it can be seen that low material quality is also a significant factor. The main performance is that the wire contains less aluminum, the wire is relatively hard, and the insulation layer is thin. This situation has been quite common in recent years.
3. The quality of supporting engineering is not as good as hard
Courtyard light cables are usually laid on sidewalks. The construction quality of sidewalks is poor, and the ground sinks, causing the cables to deform under stress, resulting in cable armor. Especially in the Northeast region, which is located in a high-altitude cold zone, the arrival of winter makes the cables and soil form a whole. Once the ground settles, it will be pulled at the bottom of the courtyard lamp foundation, and in summer, when there is a lot of rain, it will burn at the base.
4. Unreasonable design
On the one hand, it is overloaded operation. With the continuous development of urban construction, courtyard lights are also constantly extending. When building new courtyard lights, the one closest to them is often connected to the same circuit. In addition, with the rapid development of the advertising industry in recent years, the advertising load is also correspondingly connected to the courtyard lights, causing excessive load on the courtyard lights, overheating of cables, overheating of wire noses, decreased insulation, and grounding short circuits; On the other hand, when designing the lamp post, only the own situation of the lamp post is considered, and the space of the cable head is ignored. After the cable head is wrapped, most of them cannot even close the door. Sometimes the cable length is not enough, and the joint production does not meet the requirements, which is also a factor that causes faults.
Post time: Aug-08-2024