June 27, 2023
Low current charging standard
The low current wiring is 15 yuan per square meter. When designing wiring, realize principles of strong current up and weak current down, horizontally and vertically, avoiding crossing, beautiful and practical. The built-in wire cable is part of low current cable, which is mainly used for communication. For example, line super category 5, category 6 and so on. Low current cables also include other cables such as television, control, and fire protection.
Precautions for low current wiring
1 When performing various line moves and transformations, first determine position of line terminal socket, mark exact position and size on wall, and then route wires to nearest similar socket
Wiring method: if socket is at top of wall, cut vertically upwards on wall to installation line, where decorative corner line is installed on top of wall; if it is on bottom of wall, groove vertically down to top of wall. Install bottom of baseboard. The depth of groove is about 15 mm. Lay wires and cores in protective sleeve of wires, lie down in groove on wall and smooth it with cement mortar to fix it in wall.
If original rosette has been preserved, it should be installed in its original place, if not, filled with bricks and smoothed over with cement mortar. The wires on ground lie on inside of bottom of skirting board when skirting board is installed, and wires along top corner are hidden inside decorative corner line when decorative line is installed.
2 Design Specifications for Chain Renovation Project The depth of groove should be same, and top of groove line should be straight. First, control line should be drawn on wall, and then surface of wall should be carved by a marble machine, and groove should be hand-chiseled
When installing line, it is necessary to add a protective sleeve. The connection of sleeve must be tight and smooth. In a rectangular corner, inside of corner must be cut off.
After wire is installed in casing, it should be fixed with a clamp to fix wire in wall and first in wall, and then covered with plaster or covered with skirting boards and decorative corners. The installation of socket must first open a hole in wall, after wire is inserted into wire box, wire box is fixed in hole, wire is fixed by panel, and panel is fixed on wire. box. The installation method for power switch is same as for socket.
3. The wires must be made of copper wires and configured according to power used. Not too thin. For air conditioners, it is recommended to use wires with a cross section of 4 sq. mm, for sockets - 2.5 sq. mm, for general lighting fixtures - 1.5 sq. mm.
In addition to passing through fallshpol, wires must be laid through pipes; wires of different voltages, such as lighting, telephone and television wires, cannot be laid in one pipe; The socket panel must be neutral wire on left, live wire on right, and earth on top side. Wires must not be connected incorrectly, neutral wires, phase wires and earth wires must be wires of different colors.
4. For electrical wiring, a hidden piping design should be used. For electrical wiring, PVC pipes should be used for hidden pipe laying, and for open laying, PVC cable channels
During construction, avoid cracks in wall caused by gouging and damage to wall structure. When laying it, it should be changed according to number of wires passing through pipe. There should not be more than four wires in one pipe. It is forbidden for wires to occupy entire space in pipe. Air conditioners, lighting and sockets must be controlled by separate circuits, usually at least four. The lighting goes in one direction, air conditioner goes in one direction, socket goes in three or four directions. This has advantage that if a short circuit or other problem occurs on a certain line, magnitude of power outage is small and will not affect normal operation of other lines.
Three levels of low current wiring
First level: complex
Complex type is suitable for cases with high configuration standards in an integrated wiring system using optical cables and copper twisted pairs for networking. The integrated integrated wiring system is to add an optical cable system based on basic and advanced integrated wiring system.
The main feature of integrated wiring system is introduction of optical cables, which can be applied to large-scale intelligent buildings, and rest are similar to basic or advanced type.
All basic, advanced and comprehensive integrated wiring systems can support voice/data services and can upgrade wiring system according to needs of smart building projects. The main differences between them reflect following two aspects:
Method used to support voice and data services;
Increase flexibility of linear control when moving and changing layout.
Second level: extended
Advanced type is suitable for cases with medium configuration standards in an integrated wiring system using twisted-pair steel core for network. Its configuration is as follows:
There are two or more information outlets in each work area, wiring cables in each work area - two 4-pair twisted pairs;
Use direct or plug-in handoff equipment;
There are at least 3 pairs of twisted pairs for trunk line in each working area. The advanced integrated wiring system not only has advanced functions, but also gives room for development. It supports voice and data applications and can be controlled via terminal blocks if required. The advanced integrated wiring system has following features:
①Each workspace has two data slots that are not only versatile but also fully functional. Any data connector can provide voice and high speed data applications;
②The color code can be unified and terminal block can be used to control as needed;
③This is a cost-effective integrated connection scheme that can create departmental environmental services for multiple data devices;
④ Adopt discharge tube type overvoltage protection and self-healing overcurrent protection.
Third level: base type
The basic type is suitable for low-standard configuration cases in an integrated wiring system using twisted-pair copper for network, and its configuration is as follows:
1) Each work area has an information socket, wiring of each work areas is a 4-pair twisted pair;
2) Transmission clamping equipment is used, trunk cable in each working area has at least 2 pairs of twisted pairs.
Most of major integrated wiring systems can support voice/data transmission and their features are as follows:
①It can support all voice and data applications, and is a price-competitive integrated wiring solution;
②Applicable to voice, voice/data, or high-speed data;
③Easy operation for technicians;
It uses gas discharge tube type surge protection and self-healing junction protection; it can support data transmission of various computer systems.
The above are differences between three levels of integrated wiring: basic, advanced, and integrated. You can choose built-in wiring type according to your environment. Hope this helps you.