Electrical installation needs attention

(1) Regulations of Electrician National Standards

In the home, generally refers to weak electricity for telephone, television, broadband, etc., and strong electricity for the power line. The two can not be worn together in a tube, parallel distance of 300mm or more. Strong electricity (220V or 380V and other power lines) weak electricity (television and TV AV broadband alarm monitoring intercom and other transmission signal cables) can not be together when wiring! The parallel cable casing is laid more than 50CM apart and the outlet is more than 20CM apart. The TV is a weak signal and the higher frequency signal will affect the low frequency telephone and broadband signals.

I. General requirements

1. This chapter is applicable to the indoor strong and weak electric circuit wiring and installation of electric appliances and lamps after the single-phase residential household distribution box.

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. The laid pipe (threaded pipe) shall be made of steel pipe or flame-retardant rigid 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.

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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.

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