First, the size of the wire pipe specifications (pvc wire pipe as an example)

1, according to PVC wire varieties are divided into rigid pipe, semi-rigid pipe and corrugated pipe; according to the characteristics of the wire is divided into light, medium, heavy, super heavy.

2、According to the temperature level of the wire is divided into 25 type, 05 type, 90/-25 type and so on.

3, pvc wire pipe nominal outside diameter specifications, respectively: Φ16, Φ20, Φ25, Φ32, Φ40, Φ50, Φ63, Φ75, Φ110. Among them, pvc wire pipe specifications of Φ16 and Φ20 are generally used for indoor lighting wiring; the outer diameter of the pipe specifications of Φ25 are commonly used in the sockets or the indoor main wiring conduit; the outer diameter of the pipe specifications of Φ32 are commonly used for the wiring conduit of home entry line, and also used for the wiring conduits of the house. The pvc conduit with outer diameter of Φ32 is commonly used for the conduit of household wires, and is also used for the conduit of weak wires; the pvc conduit with outer diameter of Φ50, Φ63, and Φ75 is commonly used for the conduit of wires from electric panels to the household.

Second, the installation method of electrical conduit

1, if the line has a turn or the whole threading line is long, you need to add some talcum powder inside, so that it is convenient for later maintenance. If the amount is small, there may be a loose situation, you need to cut off a little bit of insulation on the front part of the wire, and then fix the core in the coil can be.

2, different voltages, different circuits of the wire can not be worn to the same tube. If it is several lighting circuits of the line or a circuit that does not interfere with each other is possible, pay attention to not wear more.

3, the end of threading to cut the wire, if the location is connected to the junction box, switch, socket and other places, then you need to reserve a length of about 15 centimeters, the distribution box needs to be reserved one-half of the length of the perimeter of the distribution box, and out of the door needs to be reserved for the length of 1.5m.

Third, the use of threading pipe precautions

1, in order to avoid the safety hazards caused by threading pipe, in construction, the wall of the hidden line using PVC rigid line pipe, pay attention to matching with the line number. Ground alignment should take into account the future will be under pressure for a long time, the construction will be affected, so the use of galvanized iron pipe, and to be fixed, do not occur in the case of crosstalk.

2, the use of threading pipe should also pay attention to, a variety of different lines can not go the same pipe line. Such as the TV antenna, telephone lines and distribution lines into the same line pipe, so that the TV and telephone signals are interfered with, affecting the normal use of these devices.