Nowadays, the terms smart home and digital home are not unfamiliar to us. In order to realize smart home and digital home, we need to do a good job in the basic project of weak current wiring first. What are the requirements for the construction of weak current wiring in residential buildings? Let's take a look at the construction specifications for weak current wiring of residential buildings.

General specification for weak current wiring:

1. This paper is applicable to the indoor strong and weak current circuit wiring and the installation of electrical appliances and lamps behind the household meter of residential single-phase household distribution box.

2. The household meter of the distribution box shall be wired and supplied according to different powers of indoor electrical equipment; High power household appliances shall be wired and installed with sockets independently.

3. During wiring, the colors of phase line and zero line shall be different; The phase line (L) of the same residence shall be of uniform color, the zero line (n) shall be blue, and the protective line (PE) must be yellow and green.

4. The resistance between conductors and between conductors to ground must be greater than 0.5m Ω.

5. Each weak electron system uses star structure.

6. 2 ~ 3 incoming threading pipes are introduced into the household information access box from the outdoor. The outgoing line threading pipe is from the household information box to each indoor information socket. The concealed pipe (threading pipe) laid shall be steel pipe or flame retardant rigid PVC pipe (rigid PVC pipe).

7. The pipe diameter utilization rate of straight pipe shall be 50% ~ 60%, and the pipe diameter utilization rate of elbow shall be 40% ~ 50%.

8. When there are local interference sources on the route and the requirements for small clear distance cannot be met, steel pipes shall be used.

9. When the straight-line laying length of concealed pipe exceeds 30m, a junction box shall be installed in the middle.

10. When the concealed pipe must be bent for laying, its route length shall be ≤ 15m, and there shall be no S-bend in this section. In case of continuous bending for more than 2 times, a junction box shall be installed. All turns are completed with pipe bender, which is the standard turning radius. The three links and four links prohibited by the State shall not be adopted.

11. The bending radius of concealed pipe shall not be less than 6 ~ 10 times of the outer diameter of the pipe.

12. There shall be no cable joints in the concealed pipe hole.

13. When wiring the power line, the cross-sectional area of the conductor used shall meet the high output power of the electrical equipment.

14. The parallel distance between wires and heating, hot water and gas pipes shall not be less than 300mm, and the intersection distance shall not be less than 100mm.

15. The joint penetrating into the piping conductor shall be set in the junction box, the joint shall be overlapped firmly, rinsed with tin and wrapped with insulating tape, and shall be uniform and tight.

16. The cassette shall be equipped with screw connection to protect the line.

Quality requirements for main materials of weak current wiring:

1. The specifications and models of electrical appliances and materials shall meet the design requirements and relevant provisions of the current national electrical product standards. ① Power line: according to national standards, standard 1.5 mm2 line is used for single electrical branch line and switch line, and standard 2.5 mm2 line is used for main line; 4mm2 wire for air conditioning socket; ② Background music line: standard 2 × 0.3 mm2 line; ③ Surround sound cable: Standard 100-300 core oxygen free copper; ④ Video line: Standard AV video and audio sharing line; ⑤ Network cable: category V UTP twisted pair; ⑥ Cable TV line: broadband coaxial cable.

2. The packaging of electrical appliances and materials shall be intact, the appearance of materials shall not be damaged, and accessories and spare parts shall be complete.

3. Plastic wire protection tubes, junction boxes and various information panels must be flame retardant products, and the appearance shall not be damaged or deformed.

4. The appearance of metal wire protection pipe and junction box shall be free of flattening and cracks, there shall be no burr in the pipe, and the pipe orifice shall be flat.

5. The terminal box, junction box used in the communication system and the switch and socket of the power distribution system shall be products matched with each equipment.

Key points of weak current wiring construction:

1. The pipeline direction, elevation and the position of switches and sockets shall be determined according to the position of electrical equipment. ① The distance between power sockets shall not be greater than 3m, 1.5m from the doorway and 30cm from the ground (International Standard); ② All sockets are 30cm above the ground; ③ The switch is installed 1.2 ~ 1.4m from the ground and 0.15 ~ 0.2m from the door frame.

2. When wiring the power line, the cross-sectional area of the conductor used shall meet the high output power of the electrical equipment.

3. The terminal head of the cassette shall be 30 cm long, and all lines shall be labeled, indicating the type, specification, date and person in charge of the project.

4. At the connection between the threading pipe and the cassette, the cassette shall not be cut. The original pipe hole must be opened to thread the threading pipe out. The threading tube remains 5mm in the cassette.

5. Concealed wire laying must be piped.

6. Wires of the same circuit shall be threaded into the same pipe, but the total number of wires in the pipe shall not exceed 4.

7. The power line and communication line shall not be threaded into the same pipe.

8. The horizontal distance between power line and socket and TV line, network line, audio and video line and socket shall not be less than 500mm.

9. The joint penetrating into the piping conductor shall be set in the junction box, the joint shall be overlapped firmly, and the insulating tape shall be wrapped evenly and tightly.

10. When connecting the switch and screw lamp conductor, the phase line shall be connected to the switch first, the phase line led out by the switch shall be connected to the terminal in the center of the lamp, and the zero line shall be connected to the threaded terminal.

11. The kitchen and toilet shall be equipped with splash proof sockets, and the switch shall be installed on the wall on the opening side of the door.

12. The line pipes are laid directly on the ground. If it is necessary to wrap around the wall or walk on the top under special circumstances, the non-standard construction must be indicated in the agreement in advance or the customer approval form must be filled in before construction.

The weak current wiring system we mentioned is the fourth essential home infrastructure after water, electricity and gas. For the construction of digital family, this is a basic work and very important. Weak current mainly includes telephone line, network line, cable TV line, audio line, video line, audio line, etc. The construction of weak current wiring is the preliminary stage for us to realize our dream of digital family. Nowadays, the terms smart home and digital home are not unfamiliar to us. In order to realize smart home and digital home, we need to do a good job in the basic project of weak current wiring first. What are the requirements for the construction of weak current wiring in residential buildings? Let's take a look at the construction specifications for weak current wiring of residential buildings.

General specification for weak current wiring:

1. This paper is applicable to the indoor strong and weak current circuit wiring and the installation of electrical appliances and lamps behind the household meter of residential single-phase household distribution box.

2. The household meter of the distribution box shall be wired and supplied according to different powers of indoor electrical equipment; High power household appliances shall be wired and installed with sockets independently.

3. During wiring, the colors of phase line and zero line shall be different; The phase line (L) of the same residence shall be of uniform color, the zero line (n) shall be blue, and the protective line (PE) must be yellow and green.

4. The resistance between conductors and between conductors to ground must be greater than 0.5m Ω.

5. Each weak electron system uses star structure.

6. 2 ~ 3 incoming threading pipes are introduced into the household information access box from the outdoor. The outgoing line threading pipe is from the household information box to each indoor information socket. The concealed pipe (threading pipe) laid shall be steel pipe or flame retardant rigid PVC pipe (rigid PVC pipe).

7. The pipe diameter utilization rate of straight pipe shall be 50% ~ 60%, and the pipe diameter utilization rate of elbow shall be 40% ~ 50%.

8. When there are local interference sources on the route and the requirements for small clear distance cannot be met, steel pipes shall be used.

9. When the straight-line laying length of concealed pipe exceeds 30m, a junction box shall be installed in the middle.

10. When the concealed pipe must be bent for laying, its route length shall be ≤ 15m, and there shall be no S-bend in this section. In case of continuous bending for more than 2 times, a junction box shall be installed. All turns are completed with pipe bender, which is the standard turning radius. The three links and four links prohibited by the State shall not be adopted.

11. The bending radius of concealed pipe shall not be less than 6 ~ 10 times of the outer diameter of the pipe.

12. There shall be no cable joints in the concealed pipe hole.

13. When wiring the power line, the cross-sectional area of the conductor used shall meet the high output power of the electrical equipment.

14. The parallel distance between wires and heating, hot water and gas pipes shall not be less than 300mm, and the intersection distance shall not be less than 100mm.

15. The joint penetrating into the piping conductor shall be set in the junction box, the joint shall be overlapped firmly, rinsed with tin and wrapped with insulating tape, and shall be uniform and tight.

16. The cassette shall be equipped with screw connection to protect the line.

Quality requirements for main materials of weak current wiring:

1. The specifications and models of electrical appliances and materials shall meet the design requirements and relevant provisions of the current national electrical product standards. ① Power line: according to national standards, standard 1.5 mm2 line is used for single electrical branch line and switch line, and standard 2.5 mm2 line is used for main line; 4mm2 wire for air conditioning socket; ② Background music line: standard 2 × 0.3 mm2 line; ③ Surround sound cable: Standard 100-300 core oxygen free copper; ④ Video line: Standard AV video and audio sharing line; ⑤ Network cable: category V UTP twisted pair; ⑥ Cable TV line: broadband coaxial cable.

2. The packaging of electrical appliances and materials shall be intact, the appearance of materials shall not be damaged, and accessories and spare parts shall be complete.

3. Plastic wire protection tubes, junction boxes and various information panels must be flame retardant products, and the appearance shall not be damaged or deformed.

4. The appearance of metal wire protection pipe and junction box shall be free of flattening and cracks, there shall be no burr in the pipe, and the pipe orifice shall be flat.

5. The terminal box, junction box used in the communication system and the switch and socket of the power distribution system shall be products matched with each equipment.

Key points of weak current wiring construction:

1. The pipeline direction, elevation and the position of switches and sockets shall be determined according to the position of electrical equipment. ① The distance between power sockets shall not be greater than 3m, 1.5m from the doorway and 30cm from the ground (International Standard); ② All sockets are 30cm above the ground; ③ The switch is installed 1.2 ~ 1.4m from the ground and 0.15 ~ 0.2m from the door frame.

2. When wiring the power line, the cross-sectional area of the conductor used shall meet the high output power of the electrical equipment.

3. The terminal head of the cassette shall be 30 cm long, and all lines shall be labeled, indicating the type, specification, date and person in charge of the project.

4. At the connection between the threading pipe and the cassette, the cassette shall not be cut. The original pipe hole must be opened to thread the threading pipe out. The threading tube remains 5mm in the cassette.

5. Concealed wire laying must be piped.

6. Wires of the same circuit shall be threaded into the same pipe, but the total number of wires in the pipe shall not exceed 4.

7. The power line and communication line shall not be threaded into the same pipe.

8. The horizontal distance between power line and socket and TV line, network line, audio and video line and socket shall not be less than 500mm.

9. The joint penetrating into the piping conductor shall be set in the junction box, the joint shall be overlapped firmly, and the insulating tape shall be wrapped evenly and tightly.

10. When connecting the switch and screw lamp conductor, the phase line shall be connected to the switch first, the phase line led out by the switch shall be connected to the terminal in the center of the lamp, and the zero line shall be connected to the threaded terminal.

11. The kitchen and toilet shall be equipped with splash proof sockets, and the switch shall be installed on the wall on the opening side of the door.

12. The line pipes are laid directly on the ground. If it is necessary to wrap around the wall or walk on the top under special circumstances, the non-standard construction must be indicated in the agreement in advance or the customer approval form must be filled in before construction.

The weak current wiring system we mentioned is the fourth essential home infrastructure after water, electricity and gas. For the construction of digital family, this is a basic work and very important. Weak current mainly includes telephone line, network line, cable TV line, audio line, video line, audio line, etc. The construction of weak current wiring is the preliminary stage for us to realize our dream of digital family.