Technical requirements for wiring of home anti-theft monitoring system

1. Typical problems of threading

     If the threading fails to meet the basic technical requirements, it will seriously affect the progress and quality of the later installation. We must attach great importance to the following basic requirements:
     1) The label must be clear, correct, and firmly attached.
     2) The length of the remaining wire at the end of the distribution frame should be consistent and meet the requirements. Excessive excess wire should be cut off, grouped and straightened according to the requirements, and tied up from the outlet of the trunk line trunk.
     3) Record the length scales at both ends of each line and conduct strict testing.

Buried concealed pipe and threading

     In the case where the cable duct is installed underground with a pipe slot, pipe duct blockage is the most important problem. It should be fully tried before threading, otherwise it will be dragged by the long threading process.

Threading of steel pipe and cable duct in the ceiling

     The threading on the suspended ceiling requires a ladder to work, which is labor intensive, but if the pipe grooves are all in line with the requirements, it should be smooth. The problem that should be paid attention to is not to wear too much at a time (less than 20 pieces). It is more time-consuming to wear 40 pieces at a time than to wear 20 pieces at a time.

     Second, threading inspection

     After the threading is completed, our construction person in charge shall check the construction work as follows:
     1) Check the threading report (tested with the cooperation of our company) including the length scale and test results. Only a complete "Threading Report" can pay the threader.
     2) Field inspection of cable trunks, grouping and binding conditions, random check of labels and scales, and random testing of continuity.

     After the inspection is completed, submit it to the manager for review.

     3. Wiring technical requirements for home anti-theft monitoring system

     (1) Understand the overall structure of the wiring system and do not wear the wrong route.
     (2) Can clearly distinguish the various cables to be laid, and do not use the wrong cable.
     (3) Familiar with the pipeline through which the cable passes.
     (4) Have rich experience in threading and know how to prevent typical problems that affect threading quality and progress.
     (5) Understand and keep in mind our special requirements for cabling system cabling.
     (6) The idea is clear, and the information points are grouped and laid in groups one by one, with little or no wear. Each group should not exceed 20 information points, otherwise the amount of cables to be laid at the same time is large, and the effort to lay them is easy to cause cable damage, and it is also easy to entangle and knot, which greatly affects the progress.
     (7) Mark the labels faithfully and strictly, and record the length scale.
     (8) Strictly organize the test, and use a multimeter to measure the continuity of each cable.

     4. Threading process

     False alarm caused by improper system design
     1) Check the pipe groove, repair the pipe guard, try on the buried pipe.
     2) All personnel involved in threading explain the structure of the wiring system, the threading process, quality points, and pay attention to protecting the cable.
     3) Planning group.
     4) Put cables in groups one by one:

(1) For one group, select the starting point for threading;
(2) The cable is transported to the starting point, the label, and the scale of the distribution frame end are recorded;
(3) Pass this group to the patch panel and leave the remaining length as required;
(4) Measure the length from the starting point to the socket end, cut off, label, mark the socket end scale, the socket end is coiled in the socket box.
(5) Make a continuity test on each cable, repair it, and modify the wrong label.
(6) Organize the threading report.
(7) Cable buckle and cable box cover

     Five, threading technical requirements

     1) All the nozzles should be equipped with plastic shields: the threading personnel should carry the shields and place them at any time when threading.
     2) Extra length: The extra length of the cable is 50cm outside the outlet box and about 1.5m outside the control box. The excess wire should be carefully wound and collected in the outlet box or the control box. The remaining length from the entrance of the wiring cabinet at the wiring box is the wiring cabinet's (length + width + depth) + 50cm.
     3) Grouping and binding: The remaining wires should be grouped according to the grouping table, straighten the binding from the outlet of the cable trough, the distance between the binding points is not more than 50cm, and it can not be tied with iron wire or hard power cord.
     4) Turning radius: The turning radius of a 50-core cable should not be less than 162mm.
     5) Vertical cable: When transitioning into the vertical steel pipe through the transition box and walking to the next layer, the cable should be tied and suspended in the transition box to avoid the weight of the cable being fully pressed on the inner cable of the corner, which will affect the transmission characteristics of the cable. The cables in the vertical trunking should be tied and suspended once per meter.
     6) The cable is laid in the wire channel: it should be straight, without entanglement or length. If the opening of the trunking is facing to the side, the cable should be bound and fixed every 1 meter.
     7) The cable is in accordance with the flat icon number of the computer, each label corresponds to a cable, and the corresponding room and socket position cannot be mistaken. The label position at both ends is 25 cm away from the end, and light-colored plastic tape is affixed. The label or quality label is written with an oil-based pen and then wrapped with transparent tape. In addition, every 1 meter from the end of the distribution frame end to the entrance of the distribution cabinet should be marked with an oil pen on the cable sheath.
     8) After completion, all cables should be fully tested for continuity. Test method: Strip the core of the cable at both ends to expose the copper core. At one end, dial the digital multimeter to the continuity test file, and the two test leads are stably connected to a pair of cable cores; at the other end, briefly touch the pair of cable cores. If you can hear the intermittent "beep" sound at the end of the watch, OK, all cores of each cable should be tested. The problems that this test can find are disconnection, disconnection and wrong labeling.

     Six, cable protection

     1) When passing through the pipe, the two ends of the pipe should be sheathed, and the connection of the pipe groove through which all cables pass should be smooth, and there must be no burrs to avoid damage to the cable.
     2) When pulling the wire, the pulling force of each wire should not exceed 11 kg, and the maximum pulling force of multiple wires should not exceed 40 kg, so as not to stretch the cable conductor.
     3) The cable used in this system is a high-speed computer network cable, which is expensive and has little margin.
     4) Once the outer skin of the cable is damaged or the core wire is exposed or there is other serious damage, the damaged cable segment should be replaced, and it cannot be connected. The connected cable cannot meet the signal transmission requirements.
     5) In the whole project, the storage and threading of the cables must be patient and meticulous, to avoid any squeezing, crushing, smashing, pinching, cutting or excessive tension of the cables. When wiring, it is necessary to meet the required extra length, but also to save as much as possible to avoid any unnecessary waste.
     6) During the wiring, if the cable is pulled out of the cable box and not yet placed in place, if the construction is to be suspended, the cable should be carefully wound up and stored properly, and it should not be randomly scattered on the construction site.