Recently home decoration, wires do not know what kind of good to buy. The plumber said he wanted me to buy hard wire, and the neighbor's repairman asked me to buy soft wire, which was completely covered. Both men swear they are right, but which of them is wrong?

After some verification, I finally knew the truth. I would like to share with you now:

Hydropower master support to buy hard cable reasons:

1. Hard wire through the pipe is easier to operate than soft wire, according to the electrical installation standard specification construction, soft wire joint needs to be pressed or welded, soft wire through the pipe after the joint electrician is difficult to do, so it is better to hard wire.

2. The diameter of the hard wire is thick enough, the insulation material is strong and reliable, and it is not easy to damage, and the use of long distance fixed lines is completely no problem.

3. Hard wire is a single strand, thick in diameter, low in cost, and cheaper than soft wire.

4. Hard wire is solid core, wire and wire joints are more secure, and will not appear virtual connection, prickling and other situations like flexible wire.

5. The interface for installing the switch panel is designed based on hard cables, which is more convenient.

6. The hard wire is rich in color and can distinguish different circuits.

7. The zero fire ground of the flexible wire is wrapped together, which is not conducive to laying alone, and the hard wire is more standardized and convenient to save materials.

Maintenance man Pops supports the cord for the following reasons:

1, later maintenance, the ductility of the cord is good, easy to maintain. Pops says his entire household is cord. And it's been tinned in a tin furnace, and there's never been a problem with the wiring in six years.

2, and the surface current of copper is large, the internal current is small, the same thick line, the same power, the heat of the flexible wire is smaller than that of the hard wire, the flexible wire is large, and the construction is convenient.

Both men are right, but from different angles. When decorating a home, it should be used in combination with the specific situation. Hard wire, soft wire as a supplement, the use of the effect will be better! Now do you know how to buy wire when renovating?

Hard line

"Hard wire" is called "PVC insulated hard wire", that is, we often say that the single strand wire, plastic copper wire, the letter code "BV". PVC insulated soft wire "is composed of a single strand of copper core and PVC insulation skin, mainly used in fixed laying places, not suitable for moving and shaking places.

BV wire copper core is thicker, its overload capacity is strong, strong adaptability to harsh environments, even if the current exceeds the rated value is not easy to break. If it is bad, it is generally the temperature of the wire that causes the insulation to be burned out, and the phenomenon of the copper core being burned off is almost no.

Flexible wire

"Flexible wire" is called "polyvinyl chloride insulated flexible wire", that is, we often say multi-strand wire, the letter code "BVR". "PVC insulated soft wire" is composed of multiple strands of copper core twisted together, this wire is soft and easy to bend, suitable for slight vibration occasions.

Because the flexible wire is composed of multiple strands of copper core twisted, the number of copper wires is more than the hard wire, so its price is higher than the hard wire, the same cross-sectional area of the flexible wire price is about 10% higher than the hard wire. In addition, because the flexible wire is better to turn and the construction is more convenient, most of the decoration masters recommend this kind of wire.

Although flexible cord has many advantages, it also has many disadvantages. Because the soft wire single strand copper wire is relatively thin and has a large surface area, it is easy to be oxidized and blackened at a high temperature, and the copper wire is easier to burn. As long as one of them is burned, the cross-sectional area at the burning point becomes smaller, the resistance becomes larger, forming a vicious cycle, and the entire cable will be burned.

Some friends say that the flexible wire is a multi-strand wire, its surface area is large, because of the skin effect of the current, so the same large cross-sectional area of the wire flexible wire can pass more current. In fact, this statement is not correct, the skin effect is mainly manifested in high frequency current, the higher the current frequency, the more obvious the skin effect. For 50Hz AC, the effect of skin effect is almost negligible.

Home improvement lines, flexible wire wire must be solder treatment, this is very important! Many masters habitually peel the skin when they switch the socket, and then slightly twist it to insert the wiring hole. Finally, when the screw was screwed in, the wire all spread out, there were 19 copper wires in the wire, but in fact only 10 copper wires touched the screw. If the joint is under heavy load, it is very common to heat up and burn off. If there is no condition to solder, then strip the wire a little longer, and then fold it in half and insert the wiring hole, the effect is much better.

Qingdao Tianxing Cable Co., Ltd. specializes in the production of customized wire and cable manufacturers, exports to more than 40 countries and regions around the world, the annual production capacity of 1 billion yuan. 6000 square meters of storage, standing hundreds of millions of inventory, order demand for rapid distribution and delivery, large prices more favorable. Hotline: 16678668090/ 16678668098