1. Requirements for weak wiring construction materials
(1) Cables
1 power cord. According to national standards, the standard 1.5mm2 for single electrical branch and switch wires, and the standard 2.5mm2 for main wires.
2 background music lines. Standard 2x0.3mm2.
8 surround sound line. Standard 100-300 core oxygen-free copper.
4 video lines. Standard AV video sharing line.
6 cable television lines. Broadband coaxial cable.
(2) The plastic electric wire protection tube, junction box and all kinds of information panels must be flame-retardant products. The appearance should not be damaged or deformed. The appearance of the wire protection tube and the junction box should not be folded and cracked. There should be no burrs in the tube and the tube mouth should be flat.
(3) The terminal box, wiring basin and the switch and socket of the distribution system used in the communication system are selected to match the equipment.
2. Connector inspection requirements
(1) The performance of the plastic material of the terminal block and information socket and other connectors shall be flame retardant.
(2) The indicators of the unit overvoltage and overcurrent protection of the security terminal block shall comply with relevant regulations.
(3) The connectors and connectors used for the optical fiber jacks are of the same type and number, location and design.
(4) The fiber socket panel shall have obvious signs of transmission (TX) and reception (î¡‚).
3. Indoor weak construction requirements
There are many places to pay attention to in home wiring. For example, the wiring distance, direction, and position of weak wires and strong wires should refer to the relevant national standards. The wire should be protected by PVC wire and pipe, and rounded corners should be used at the corner to facilitate Line switching.
(1) Strict construction according to drawings or communication with the owner, and on the premise of ensuring the functional quality of the system, improve the process standards and ensure the construction quality.
(2) The position of the wiring path and the information outlet on the sketch determined by the drawings or communicated with the owner shall be accurate and without omissions.
(3) Wires at both ends of wire conduits shall be provided with sufficient redundancy according to actual conditions. Both ends of the wire shall be marked with labels according to the wire number for drawing, and terminal wiring shall be performed according to the wire color, and shall be Marked on the drawings and archived as construction data.
(4) The installation of the equipment should be firm and beautiful, and the wall-mounted equipment should be correct and consistent.
4. Construction sequence
1) Determine the point
(2) The basis for the determination of points. According to the weak electric wiring construction drawings or communicate with the owner to determine the wiring scheme, combined with the point diagram, use a pencil, ruler or ink fountain on the wall to mark the position of the cassette at each position.
(3) The cassette height is determined. Except for special requirements, the height of the cassette is the same as that of the original strong electric socket. The height of the background music tuning switch should be the same as the height of the strong electric switch. If there are multiple cassettes together, the distance between the cassettes is at least 10mm.
(4) Determine the line length for each point. Measure the length of the information box to each information outlet, plus the redundancy line length at the information outlet and information box. The redundant length of the cable at the information box is half the perimeter of the information box. The cable at each information point is redundant. The remaining length is 200 to 300mm.
(5) Determine the label. Cut various types of cables to certain lengths and label them on both ends of the line, and indicate weak electricity types, rooms, and serial numbers.
(6) Determine the number of pipe lines. The cross-sectional area of ​​the cable in the conduit must not exceed 40% of the cross-sectional area of ​​the conduit.
Because different room environments require different information outlets to cooperate with them, during the design of the construction, the user's requirements for indoor layout should be considered as much as possible, and at the same time, the convenience and safety of connecting devices (such as computers, telephones, etc.) from information outlets should be considered. Sex.
Wall mounted information outlets are generally considered for embedded installation. The standard type 86 bottom box is adopted in China. The wall box is square, with a size of 80mm×80mrn, and the screw hole spacing is 60mm. The distance between the information socket and the power outlet should be greater than 20cm. Desktop sockets should be considered in coordination with furniture and desks, and the safety of the installation location should be considered.
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