Hurry, you know that PVC20 pipes can be threaded with up to a few wires of 2,5 squares

Up to 7 can be worn.

The specification stipulates that the cross-sectional area of the threading shall not exceed 40% of the cross-sectional area of the pipe, while the 40% cross-sectional area of the PVC20 pipe is, and the cross-sectional area of the square line is 11.

4 roots. When the PVC pipe is used as a flame retardant plastic line pipe, the number of threads is certain, that is, 4 power cords can be threaded into the PVC pipe with a diameter of 20mm.

3 power cords can be threaded into the PVC pipe with a diameter of 16mm, and more power cords will affect the normal operation of the power supply circuit.

PVC pipes require firm connections and seamless gaps; When the PVC pipe is arranged on the roof of the house, the PVC pipe should be fixed with the top of the wall; When the PVC pipe enters the line, it should be connected with the wire box with a lock.

There are two main types of wires for home decoration: BV and BVR

The letter B stands for cloth wire, voltage: 300 500V

The letter V stands for PVC polyvinyl chloride, which is the plastic insulation.

The letter r stands for soft, and to be soft, it is to increase the number of conductors and reduce the diameter of each wire.

Comparison of the advantages and disadvantages of the two wires:

1. BV PVC insulated single-core hard wire (single-strand hard wire).

Disadvantages: the wire is hard, it is difficult to straighten after bending, it is easy to be injured when repeatedly bending and straightening, and it is laborious when setting small tubes. It is mostly used in fixed and buried environments.

Advantages: long service life, due to the small cross-sectional area ratio of the outer garden area, it is not easy to oxidize, and it is resistant to short-circuit current impact. Generally, it is mostly used in shielding projects. In some places with strict requirements, such as the secondary lead wire of the current transformer, the specification clearly indicates that the use of BVR line is prohibited.

2. BVR PVC insulated multi-strand copper-core flexible wire (multi-strand flexible wire).

Advantages: Because the wire is soft, it is mostly used in active electricity places and temporary power places, and it is easy to install, drag and drop and move.

Disadvantages: short service life, because the ratio of the total outer garden area to the total cross-sectional area is very large, the oxidation rate is fast, if it is impacted by short-circuit current, after high temperature, the surface is seriously oxidized, the effective cross-section is greatly reduced, and it is easy to have problems such as core breakage and local heating.

How many square wires can be threaded through the pvc20 conduit according to the specification. Thank you!

Up to 7 can be worn. The cross-sectional area of the specification silver finch stipulates that the cross-sectional area of the threading shall not exceed 40% of the cross-sectional area of the pipe, and the 40% cross-sectional area of the PVC20 pipe is, and the cross-sectional area of the square line is 11.

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Answer: The 16mm conduit can penetrate 3 square wires, and the 16mm conduit can wear 3 square wires in the most acre section. Xunzhong According to the construction safety regulations, the space occupied by the wire worn in a wire pipe shall not exceed 40%, then the radius in the 16mm wire pipe (r) = ( 16 wire C pipe cross-burning sock cross-sectional area s = r = the diameter of the square wire (including the insulation layer) is then the radius is (r) = square wire cross-sectional area s = r = root, that is to say, a 16C pipe can wear up to 6 square wires Therefore, a 16mm wire can wear up to 6 * 40% 3 square wires.

Hello dear, I'm glad to answer for you! 25mm conduit can wear 6 or 7 wires or so. 25 threading pipe through square meters of wire, generally can wear about 6 to 7, this is to wear a hard single strand copper core wire can wear 6 to 7, if it is considered that after threading, the wire will produce heating phenomenon when energized, it is best not to wear so many wires, wear about six is enough, do not squeeze him too tightly, so as to ensure that the wire in the wire tube can be used normally for a long time.

PVC threading pipes with a diameter of 16 mm are used.

The reason is: wire cross-sectional area = 5 * 6 = 30 square millimeters, because the cross-sectional area can not exceed 40% of the cross-sectional area of the pipe, and the minimum cross-sectional area of the threading pipe = 30 square millimeters.

The cross-sectional area of the pipe with a diameter of 16 mm = square millimeters, which is enough for use.

Summary. 2.Do you have any other questions?

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Can 20 wires wear two 10 square wires?

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20 lines of pipe can not wear two 10 square lines, the line is small.

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Hello, hello 20 pvc wire pipe how many are there? A: There are 25 and 33 20 pvc conduits, generally a bundle of 100 meters, 33 by meter, and 25 by 4 meters. Other specifications are also available. <>

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