What are the specifications for the arrangement of wires in the ceiling

I've seen them all work like this. The conduit is laid along the wall or snapped above the keel. Add a metal corrugated hose to the conduit to the electrical appliance. In short, there are no wires visible on the ceiling.

Yes, it looks like this in the specification:

The branch line is this connection, the main line can not be truncated, and the attached wire is wound around the main line for 6-8 turns. The phenomenon of wire ignition, short circuit, poor contact is very serious, it is very simple to deal with, the wire ignition and short circuit is caused by the lack of correct terminals, after the terminal is loosened, electric ions will be generated when the high load current passes, and the electric ions repel each other like the welding sparks of electric welding, and the temperature has also risen, and quickly, if it can be glued, it will be energized, and it will form a short circuit if it cannot be electrified.

The wire must be placed into the conduit. To calculate the wire diameter, it should not be too thin. The fittings need to be soldered with a soldering iron. The rest comply with other norms.

The built-in wire must be placed in the plastic pipe of the edge and the connector is placed outside, so that it is OK

I was a little hesitant when I wrote this post, the electrician technology is very simple, I want to take it out and say it's a bit of a fuss, I still watched yesterday's TV said that there is a country Peugeot building 300 meters high, the police initially believe that it is caused by a short circuit in the wire or the wire ignition I know about this aspect, how the line will be ignited, why it will be short-circuited, and his standard practice to tell you, if your peers think it is inappropriate, please correct. I'm going to make a few diagrams here for you to see. The top is a secondary ceiling, I will take him as an example, please see the diagram and description of the wire practice in the roof.

Hello! 1。Theoretically, the wire must be put into the PVC conduit, PVC is flame retardant, once the wire catches fire, then the PVC flame retardant pipe can stop the fire from continuing to expand, because PVC is not easy to burn.

2。It is better to set the circuit breaker separately. 3。

Try not to bend or bend the line in routing. 4。Choose the wire diameter that matches your electrical fixture, which generally must be above.

5.The joints are made of three-proof elastic tape. 6.

It's best to have one light and one line. However, do not use a single line with multiple lights to facilitate future maintenance. Thank you

Hello, according to the specifications, the wires on the ceiling should be worn with metal pipes, and there should be no joints.

Personally, it is recommended that the line go to the roof of the shed, and use high-quality lines, the direction of the wires should avoid crossing as much as possible, and the number of jacks must be designed in advance for home decoration to avoid regrets after completion, and many decorators will complain about this matter after decoration.