Code and technology for construction of strong current and weak current?

1, this specification is applicable to indoor strong and weak circuit wiring and installation of electrical appliances and lamps behind single-phase household distribution boxes in residential buildings.

2, distribution box table should be according to the different power of indoor electrical equipment wiring power supply; High-efficiency household appliances should be wired independently and installed with sockets.

3. When wiring, the colors of the phase line and the zero line should be different; The phase line (L) of the same residence should be uniform in color, the neutral line (N) should be blue, and the protection line (PE) must be yellow-green double-color line.

4. The resistance between wires and between wires and the ground must be greater than 0.5M.

5. All weak current subsystems are of star structure.

6.2~3 feed pipes are introduced into the household information access box from the outdoor. The outlet conduit extends from the home information box to each indoor information socket. The concealed pipes (threading pipes) laid shall be steel pipes or resistors.

Burning rigid PVC pipe (rigid PVC pipe).

7. The pipe diameter utilization rate of straight pipes should be 50%~60%, and that of bent pipes should be 40%~50%.

8. When there are local interference sources on the line and the minimum clear distance cannot be met, steel pipes should be adopted.

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

10, when the concealed pipe must be bent and laid, its routing length should be ≤ 15m, and there should be no S-bend in this section. When bending continuously for more than 2 times, the junction box shall be installed. All bending is done with a pipe bender, which is the standard turning radius. Three links and four links prohibited by the state shall not be used.

1 1, and the bending radius of the concealed pipe shall not be less than 6~ 10 times of the external diameter of the pipeline.

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

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

14. The parallel distance between wires and heating, hot water and gas pipelines should not be less than 300mm, and the crossing distance should not be less than 100mm.

15, the connector of the wire passing through the pipeline should be located in the junction box, and the connector should be firmly overlapped, rinsed with tin and wrapped evenly and tightly with insulating tape.

16, the cassette should be equipped with screw connection to protect the line.

Quality requirements of main materials

1, the specifications and models of electrical appliances and electrical materials should meet the design requirements and the relevant provisions of the current national electrical product standards.

① Power cord: According to national standards, standard 1.5 mm2 conductor is used for single electrical branch line and switch line, and standard 2.5 mm2 conductor is used for main line; 4 mm square wire for air conditioning socket;

② Background music line: standard 2 × 0.3 square millimeter line.

③ Surround sound line: standard 100-300 core oxygen-free copper.

④ Video line: standard AV video * * * enjoy line.

⑤ Network cable: Super five UTP twisted pair.

⑥ Cable TV line: broadband coaxial cable.

2, electrical appliances, electrical materials packaging should be intact, material appearance should not be damaged, accessories, spare parts should be neat.

3, plastic wire protection tube and junction box, all kinds of information panel must be flame retardant products, appearance should not be damaged and deformed.

4, metal wire protection tube and junction box appearance should not be straight and crack, tube should be no burr, nozzle should be smooth.

5. The junction box, junction box, switch and socket of the power distribution system used in the communication system should be selected with products matching with each equipment.

Key points of construction:

1, the pipeline direction, elevation, switch and socket position shall be determined according to the position of electrical equipment.

(1) The distance between power sockets shall be no more than 3m, no more than 0.5m from the door and 30cm from the ground. (International standard)

② The height of all sockets from the ground is 30cm.

③ The installation distance of the switch is 1.2~ 1.4m, and the door frame is 0.15 ~ 0.2m..

2. When wiring the power cord, the cross-sectional area of the conductor used should meet the maximum output power of the electrical equipment.

3. The connector of the cassette should be 30cm long, and all lines should be labeled, indicating the model, specification, date and project leader.

4. At the joint between the threading tube and the cassette, the cassette is not allowed to be cut, and the original tube hole must be opened to thread the threading tube out. The threading tube is kept 5 mm in the box.

5, dark wiring must be piping.

6. The wires in the same loop should be inserted into the same tube, but the total number of wires in the tube should not exceed 4. 7, the power cord and communication line shall not be inserted into the same tube.

8. The horizontal spacing between power cord and socket and TV cable, network cable, audio-visual cable and socket should not be less than 500mm.

9, wear into the tube wire connector should be located in the junction box, joint lap firmly, insulation tape package should be uniform and tight.

10. When connecting the wires of the switch and the screw lamps, the phase wire should be connected to the switch first, the phase wire led from the switch should be connected to the terminal in the center of the lamp, and the zero wire should be connected to the threaded terminal.

1 1. A splash-proof socket should be installed in the kitchen and bathroom, and a switch should be installed on the wall on the open side outside the door.

12. The conduit is laid directly on the ground. Under special circumstances, if it is necessary to walk around the wall or on the roof, it is necessary to indicate the irregular construction in advance in the agreement or fill in the customer approval form before construction.

Construction details:

First, determine the key points.

1. Basis for determining points: Mark the cassette position of each point with a pencil, ruler or Amodou according to the home wiring design drawing and the point map on the wall.

2. Determination of cassette height: except for special requirements, the cassette height should be the same as that of the original high-voltage socket, and the height of the background music tuning switch should be the same as that of the original high-voltage switch. If there are multiple cassettes

The distance between boxes should be at least10mm.

Second, slotting

1. Determine the slotting route according to the following principles:

(1) the shortest route principle;

(2) It does not destroy the original high-pressure principle;

(3) Do not destroy the waterproof principle.

2. Determine the slot width: determine the number of PVC pipes according to the number of signal lines, and then determine the slot width.

3. Determine the grooving depth: if 16mm PVC pipe is selected, the grooving depth is 20mm；; If 20mm PVC pipe is selected, the grooving depth is 25mm.

4. Appearance requirements of trunking: horizontal and vertical, with the same size.

5. Measurement of trunking: The cassette and trunking shall be calculated independently. All trunking shall be measured from the beginning of trunking to the end of trunking. If more than two pipes are placed within the width of the wire groove, the length should be calculated as more than twice.

Third, wiring.

1, to ensure smooth cable:

① Test of network cable and telephone line: make crystal heads respectively and test the connection and disconnection with network tester;

② Testing of cable TV cable, audio and video cable and audio cable: use multimeter to test on and off respectively;

③ Other cables: test the connection and disconnection with corresponding professional instruments.

2, determine the line length of each point:

① Measure the length from the junction box slot to each point end;

② Add the length of redundant lines at each point and distribution box slot: the length of outgoing lines at each point is 200mm-300mm.

3. Label determination: After cutting all kinds of cables according to a certain length, put labels on both ends of the line, indicating: weak current type-room-serial number.

4. Determine the number of lines in the pipe: the cross-sectional area of lines in the pipe should not exceed 80% of the cross-sectional area of the pipe.

Fourth, seal the groove.

1. Fix the cassette: except for the cassette in the kitchen and bathroom, which should protrude 20mm from the wall, other cassettes should be flush with the wall. When several boxes are together, they are required to be on the same level.

2, fixed PVC pipe:

(1) PVC pipes on the ground must be fixed every one meter;

(2) grooved PVC pipes must be fixed every two meters;

(3) PVC pipe wall groove requirements must be fixed every one meter.

3. Groove sealing: The wall and ground after groove sealing shall not be higher than the plane.

4. Clean up the construction site: after the trench is closed, remove the garbage and clean up the construction site.

Attachment: In order to avoid all kinds of lines from bending into loops and ensure that all lines are "live lines", the wiring construction technology is to lay straight pipes on the ground (it is not allowed to walk in the skirting line or ceiling without special circumstances, otherwise the lines cannot be made into "live lines").

I believe that after the above introduction, everyone has a certain understanding of the construction specifications and technologies of strong electricity and weak electricity. Welcome to Zhong Da for more information.

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