1. This specification is applicable to the wiring of indoor and outdoor weak and strong electrical circuits and the installation of electrical appliances and luminaires after a single-phase residential household distribution box. The main material quality requirements 1. The specifications and models of electrical appliances and electric materials should meet the design requirements and relevant regulations of the current national electrical product standards. Construction points: 1, according to the location of electrical equipment, determine the direction of the pipeline, elevation and switch, socket location. 1 The power socket spacing is not more than 3m, and the distance from the doorway is not more than 1.5m, 30cm from the ground. (International Standards) 2 All sockets are 30cm above ground level. 3 The switch is installed at a distance of 1.2~1.4m from the ground and 0.15~0.2m away from the door frame. 2. When the power cord is wired, the cross-sectional area of ​​the conductor used should meet the maximum output power of the electrical equipment. 3, The length of the cassette terminal is 30 centimeters long. All lines should be labeled and indicate the type, specification, date and person responsible for the project. 4. The connection between the threading tube and the film box, the film box must not be cut, the original tube hole must be opened, and the threading tube must be pierced. The threading tube remains 5 mm in the cassette. 5, the dark line laying must be piped. 6. The same loop wire should penetrate the same pipe, but the total number of pipes should not exceed four. 7. The power line and communication line must not penetrate the same pipe. 8. The horizontal distance between the power cord and socket and the TV line, network cable, audio and video cable and socket should not be less than 500mm. 9. The joints that penetrate the pipe wires should be located in the junction box. The joints should be firmly connected and the insulation tape should be uniformly wrapped. 10. When connecting the switch and screw fixture wire, the phase wire should be connected to the switch first. The phase wire led by the switch should be connected to the terminal in the lamp center. The neutral wire should be connected to the screwed terminal. 11. Splashproof sockets shall be installed in the kitchen and bathroom. Switches shall be installed on the wall on the open side of the door. 12. The line pipe shall be directly laid on the ground. If there are special circumstances that need to be taken around the wall or the roof, the non-standard construction must be indicated on the agreement in advance or the “customer approval form†must be completed before construction. Construction details: First, determine the point Attachment: In order to avoid the bending circuit of all kinds of lines, ensure that all the lines are "live lines", and the wiring construction process is the direct laying of the ground (no special conditions are not allowed to walk in the baseboard or the ceiling, otherwise the line cannot be made "live" Line").
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2. After the power distribution box and the household meter, the power supply shall be separately provided according to the different power of the indoor power equipment; the high-power household appliances shall be independently wired and installed.
3, wiring, the color of the phase line and the zero line should be different; the same residential line (L) color should be uniform, the neutral line (N) should use blue, protection line (PE) must use yellow and green color line.
4, between the lead and the resistance between the wire and ground must be greater than 0.5M Ω.
5. Each weak electronic system uses a star structure.
6. Two or three incoming threading pipes are introduced into the home information access box from the outdoors. Outlet threading pipe from home information box to each indoor information outlet. Pipes (pipes) to be laid should be steel pipe or rigid hard PVC pipe (rigid PVC pipe).
7. The utilization of the diameter of the straight pipe should be 50%~60%, and the utilization of the diameter of the elbow should be 40%~50%.
8. If there is a local interference source on the route and the minimum net distance requirement cannot be met, the steel pipe shall be used.
9. If the length of the straight pipe is longer than 30 meters, a wire box shall be installed in the middle.
10. When the dark pipe must be bent and laid, the route length should be ≤ 15 meters, and there should be no S bend in this section. When continuously bending more than 2 times, a cable box should be installed. All bends are completed with a pipe bender, which is the standard turning radius. The three links and four links that are prohibited by the state shall not be used.
11. The bending radius of the blind pipe must not be less than 6 to 10 times the outside diameter of the pipe.
12. There must be no cable connectors in the dark tube hole.
13. When the power cord is wired, the cross-sectional area of ​​the conductor used should meet the maximum output power of the power equipment.
14. The parallel distance between electric wires and heating, hot water and gas pipes should not be less than 300mm, and the crossing distance should not be less than 100mm.
15. The joints that penetrate the pipe wires shall be located in the junction box. The joints shall be firmly connected, and the tin shall be covered with insulating tape and shall be uniformly and tightly packed.
16, the cassette should be installed screw to protect the circuit. 
1 Power cord: According to the national standard, the standard 1.5 square millimeter wire for single branch and switch wires, and the standard 2.5 square millimeter wire for main wires; 4 mm square wire for air conditioning outlets;
2 Background Music Line: Standard 2 × 0.3 mm 2 Line
3 surround sound cable: standard 100-300 core oxygen-free copper
4 video cable: standard AV video sharing line
5 network cable: UTP UTP twisted pair
6 Cable TV Line: Broadband Coaxial Cable
2. The packaging of electrical appliances and electric materials should be in good condition, the appearance of materials should not be damaged, and accessories and spare parts should be complete.
3, plastic wire protection tube and junction box, all kinds of information panels must be flame-retardant products, the appearance should not be damaged and deformed.
4. The appearance of the metal wire protection tube and terminal box should not be folded and cracked. There should be no burrs in the tube, and the tube mouth should be flat.
5. The terminal box, junction box and switch and socket of the distribution system used in the communication system are selected to match the equipment.
1, the basis for the determination of points: According to the family wiring design drawings, combined with the schematic diagram of the point on the wall, with a pencil, ruler or ink fountain will be marked at the location of the cassette position.
2, the cassette height determination: In addition to special requirements, the height of the cassette is consistent with the original strong electric socket, the height of the background music tuning switch should be consistent with the height of the original strong electric switch. If there are multiple cassettes together, the distance between the cassettes is at least 10mm.
Second, slotting
1, determine the slot route: According to the following principles:
1 The principle of the shortest route;
2 Do not destroy the original principle of strong electricity;
3 Do not break the waterproof principle.
2, determine the slot width: According to the number of signal lines to determine the number of PVC pipe, and then determine the width of the slot.
3. Determine the groove depth: If a 16mm PVC tube is selected, the groove depth is 20mm; if a 20mm PVC tube is selected, the groove depth is 25mm.
4, appearance requirements of the trough: horizontal and vertical, uniform size.
5, the measurement of trunking: cassette, slot independent calculation, all slots from the beginning of the slot to the end of the slot measurement, the slot width if more than two tubes, the length should be calculated more than twice.
Third, the wiring
1, to determine the smoothness of the cable:
1 Test of network cables and telephone lines: Make crystal heads respectively, and use a network tester to test continuity;
2 Test of cable TV lines, audio and video cables, and audio cables: test and disconnect each other with a multimeter;
3 other cables: use appropriate professional instrument test continuity.
2, to determine the line length of each point:
1 Measure the length of the wiring box slot to each point end;
2 Add the length of redundant lines at each point and at the wiring box slot: The length of the outlet line at each point is 200mm - 300mm.
3, to determine the label: the various types of cables cut to a certain length after the two ends of the line labeled, and indicate: weak type - room - serial number.
4, to determine the number of pipe lines: the cross-sectional area of ​​the pipe line shall not exceed 80% of the pipe cross-sectional area.
Fourth, sealing slot
1. Fixed cassette: In addition to the kitchen and bathroom cassettes protruding from the wall 20mm, other cassettes are required to be flush with the wall surface. Several cassettes are required to be on the same level.
2, fixed PVC pipe:
1 Ground PVC pipe requires that every one meter must be fixed;
Two-slot PVC pipe requires that every two meters must be fixed;
3 Wall grooved PVC pipes must be fixed at intervals of one meter.
3. Sealing groove: The wall surface and ground surface after sealing the groove shall not be higher than the plane.
4. Clean the construction site: After the sealing tank is closed, remove the garbage and clean the construction site.
1. Origin:
2. The name RJ stands for the registered jack and is the USOC (universal service ordering codes) code of bell system. USOC is a series of registered sockets and their wiring mode, which are developed by bell system to connect the user's equipment to the public network. FCC regulations control the application of this purpose. The FCC (Federal Communications Commission) issued a document on behalf of the U.S. government to specify RJ11.
3. RJ11 is the common name of the connector developed by Western Electric Co. Its shape is defined as a 6-pin connecting device. Originally called wexw, where x means "active", contact or needle. For example, we6w has all six contacts, numbered from 1 to 6. The we4w interface only uses four pins, the outermost two contacts (1 and 6) are not used, and we2w only uses the middle two pins. For RJ11, the information source is contradictory. It can be a 2 or 4-core 6-pin connector. What's more confusing is that RJ11 is not only used to represent the 6-pin connector, it also refers to the 4-pin version.
4. RJ45 and RJ11: different standards, different sizes
5. Due to the different sizes of the two (RJ11 is 4 or 6-pin, RJ45 is an 8-pin connection device), it is obvious that the RJ45 plug cannot be inserted into the RJ11 socket. However, it is physically feasible (RJ11 plug is smaller than RJ45 jack), which makes people think that they should or can work together. It's not. It is strongly recommended not to use RJ11 plug for RJ45 socket.
â’ because RJ11 is not internationally standardized, its size, insertion force, insertion angle, etc. are not in accordance with the international standard connector design requirements, so interoperability cannot be guaranteed. They even cause damage to both. Since the RJ11 plug is smaller than the RJ45 socket, the plastic parts on both sides of the plug will damage the metal pin of the inserted socket.
RJ - 45 port is our most common port, it is our common twisted pair Ethernet port
Because twisted pair is mainly used as transmission medium in Fast Ethernet, RJ-45 port can be divided into 10Base-T network RJ-45 port and 100base TX network RJ-45 port.
Among them, the RJ-45 port of 10Base-T network is usually identified as "eth" in the router, while the RJ-45 port of 100base TX network is usually marked as "10 / 100btx". This is mainly due to the fact that most products of Fast Ethernet router still adopt 10 / 100Mbps bandwidth adaptive.
The left figure shows the RJ-45 port of 10Base-T network, while the right figure shows the RJ-45 port of 10 / 100base-tx network. In fact, the two RJ-45 ports are exactly the same in terms of the port itself, but the corresponding network circuit structure in the ports is different, so they can not be connected casually.
Definition of RJ45 interface pin signal
Ethernet 10 / 100Base-T interface:
1 TX + tranceive data +
2 TX - tranceive data -
3 RX + receive data +
4 N / C not connected
5 N / C not connected
6 RX - receive data
7 n / C not connected
8 N / C not connected
Ethernet 100base-t4 interface:
1 TX_ D1 + tranceive data +
2 TX_ D1 - tranceive data
3 RX_ D2 + receive data +
4 BI_ D3 + bi directional data +
5 BI_ D3 bi directional data
6 RX_ D2 - receive data
7 BI_ D4 + bi directional data +
8 BI_ D4 bi directional data
Note: RJ45 interface adopts differential transmission mode, TX + and TX - are a pair of twisted pair, which can reduce interference when twisted together.