1. Details and points concerning the construction of weak wiring
The construction specification of weak wiring is the guiding principle for wiring construction, and it is also the basis and standard for acceptance of construction units and customers. Then, in the construction of integrated wiring, as the construction side, what kind of wiring guidelines should we operate? When we are working on weak wiring, what problems should we pay attention to?
The construction specification of weak wiring is the guiding principle for wiring construction, and it is also the basis and standard for acceptance of construction units and customers. Then, in the construction of integrated wiring, as the construction side, what kind of wiring guidelines should we operate? When we are working on weak wiring, what problems should we pay attention to? Let's take a look at the following: the construction details of the wiring and several points of construction.
Weak wiring construction details:
First, determine the location
1. Basis for determining the position: According to the household wiring design drawing, combined with the point diagram on the wall, mark the position of the cassette at each point with a pencil, ruler or ink fountain.
2, the height of the cassette is determined: except for special requirements, the height of the cassette is the same as the original high-power socket, and the height of the background music tuning switch should be the same as the height of the original high-power switch. If there are multiple cassettes together, the distance between the cassettes is at least 10mm.
Second, slotting
1. Determine the slotting route: according to the following principles: a, the principle of the shortest route; b, do not destroy the original principle of strong electricity; c, do not destroy the principle of waterproofing.
2. Determine the slot width: Determine the number of PVC tubes according to the number of signal lines, and then determine the width of the slot.
3. Determine the groove depth: if a 16mm PVC pipe is used, the groove depth is 20mm; if a 20mm PVC pipe is used, the groove depth is 25mm.
4, the appearance of the trunking requirements: horizontal and vertical, uniform size.
5. Measurement of the trunking: The cassette and slot are calculated independently. All the slots are measured from the starting point of the slot to the end of the slot. If more than two tubes are placed in the slot width, the length should be calculated by more than twice.
Third, integrated wiring
1. Determine the cable fluency: a. Test of network cable and telephone line: respectively, make crystal head, test and switch with network tester; b, test of cable TV line, audio and video cable, audio cable: test and switch with multimeter ;c, other cables: test the continuity with the corresponding professional instrument.
2. Determine the length of the line for each point: a. Measure the length of the wiring box slot to each point end; b. Add the length of each point and the redundant line at the wiring box slot: the line at each point exit The length is 200mm - 300mm.
3, determine the label: cut all kinds of cables according to a certain length, the two ends of the line are respectively labeled, and indicate: weak type - room - serial number
4. Determine the number of wires in the pipe: The cross-sectional area of ​​the pipe shall not exceed 80% of the pipe cross-sectional area.
Fourth, sealing the slot
1. Fixed cassette: Except that the kitchen and bathroom cassettes should protrude 20mm from the wall, other cassettes and walls should be flush. Several cassettes are required to be on the same level.
2. Fixed PVC pipe: a. The ground PVC pipe must be fixed at intervals of one meter; b. The grooved PVC pipe must be fixed at intervals of two meters; c. The wall groove PVC pipe must be fixed at intervals of one meter.
3, sealing groove: the wall surface after sealing, the ground should not be higher than the plane.
4. Cleaning the construction site: After the sealing is completed, remove the garbage and clean the construction site.
In addition, in order to avoid the bending circuit of various lines, all the lines are guaranteed to be “live linesâ€, and the wiring construction process is the direct way of piping on the ground (no special circumstances can not walk in the skirting or ceiling, otherwise the line can not be made “live Line").
Several points to be aware of in the construction of weak current wiring:
1. The position of the pipeline, the elevation, and the position of the switch and socket should be determined according to the location of the electrical equipment:
a, the power socket spacing is not more than 3m, no more than 1.5m from the doorway, 30cm from the ground. (International Standard);
b, all sockets are 30cm from the ground;
c. The switch is installed at a distance of 1.2~1.4m from the ground and 0.15~0.2m from the door frame.
2. When wiring the power cord, the cross-sectional area of ​​the conductor used should meet the maximum output power of the powered device.
3, the cassette terminal length of 30 cm, all lines should be labeled, and indicate the type, specifications, date and project leader.
4, the threading tube and the cassette connection, the cassette is not allowed to cut, the original tube hole must be opened, the threading tube is worn out. The threading tube is kept 5 mm in the cassette.
5, dark line laying must be piping.
6. The same circuit wire should be inserted into the same pipe, but the total number of pipes in the pipe should not exceed 4.
7. The power cord and communication cable must not penetrate into the same tube.
8. The horizontal distance between the power cord and socket and the TV cable, network cable, audio and video cable and socket should not be less than 500mm.
9. The joints that penetrate the piping wires should be placed in the junction box. The joints should be firmly connected and the insulation tape should be evenly packed.
10. When connecting the switch and the screw light, the phase line should be connected to the switch first. The phase line drawn by the switch should be connected to the terminal of the lamp center, and the neutral line should be connected to the threaded terminal.
11. The kitchen and bathroom should be installed with splash-proof sockets. The switch should be installed on the wall on the open side of the door.
12, the line pipe is to take the ground direct pipe management method, if there are special circumstances need to go around the wall or to go to the top, you must first indicate the non-standard construction in the agreement or fill out the "customer approval form" before construction.
In summary, we have already learned the four criteria that need to be learned when constructing weak current wiring and the 12 points that should be paid attention to during construction. Then in the future weak wiring construction project, we also recommend that you integrate the theoretical knowledge into the practice, improve the process of weak wiring construction and provide work efficiency.
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