A netizen asks circuit reform Raiders

Recently, netizens Jian Jian and Jane put forward a question about circuit reform in Shanghai Tuanwang.com, the exchange area for netizens. Here, Xiaobian collects some knowledge about circuit reform and hopes to help netizens.

The basic knowledge of circuit reform

1. Each household should be provided with separate distribution box. The leakage circuit breaker should be set in the distribution box. The leakage current should be no more than 30mA, there is overload and overvoltage protection function, and the points are routed out to control the lighting, air conditioning and socket respectively. Etc. The circuit should ensure that the load is used normally.

2. The laying of conductors shall be carried out in accordance with the decorative design regulations. Short-circuit protection, overload protection, selection of conductor cross-sections, and installation of low-voltage electrical installations shall be carried out according to the current national standards and the relevant regulations of Shanghai.

3, indoor wiring in addition to the hollow floor should be worn through the pipe laying, and the use of well-insulated single-core copper conductor. When laying through pipes, the total cross-sectional area of ​​the conductors in the pipe shall not exceed 40% of the cross-sectional area of ​​the pipe's inner diameter. There shall be no joints or kinks in the pipe. Wires and telephone lines, closed-circuit television lines, communication lines, etc. must not be installed in the same pipeline.

4. The cross section of lighting and electric heating load shall be selected so that the safe ampacity of the conductor is not more than the sum of the rated currents of all the electrical appliances in the branch, and the capacity of each sub route shall not exceed the capacity of the incoming line.

5. The grounding protection should be reliable. The insulation resistance between the conductors and the conductor to the ground should be greater than 0.5MΩ.

6. The wall thickness of the PVC plastic conduit of the household shall not be less than 1.2mm.

7. Electric heaters shall not be installed with ordinary sockets and shall not be directly mounted on combustible components. Bathroom sockets should be splashproof.

8. The socket should not be less than 200mm from the ground. There should be a margin in the wire inside the box, and the length should be 150mm. When the wiring phase into the switch, the zero line directly into the lamp, screw mouth lamp phase line should not be connected to the shell, the lamp opening distance from the ground should be 1.3mm, the switch should not be installed after the door.

9. The electrical piping in the ceiling shall be in accordance with the requirements of the open piping. The piping shall not be fixed on the flat top hanger or keel. The configuration of the lamp box and junction box should be easy to repair and cover plate. If the hose is used to receive the lamp, its length should not exceed 1m. Hose applications at both ends of the dedicated connector and junction box, lighting fixtures. The metal hose itself should be grounded. All kinds of strong and weak wires must not be exposed in the ceiling.

NVC lighting design socket lighting switch decorative appliances bathroom design bathroom door