Multi-strand wire is BVR single-core multi-strand flexible wire and single-strand wire is BV single-core single-strand hard wire. There is no difference between who is worse and who is bad, only who is suitable for which position.
Flexible cord: higher price, weaker tensile strength, weaker corrosion resistance, stronger fatigue resistance, scrap recovery rate Low.
Hard wire: low price, strong tensile strength, strong corrosion resistance, weak fatigue resistance, high scrap recycling rate.
The advantages and disadvantages of soft wires and hard wires also determine their use and place
Hard wires: generally hard wires are used for burying walls and ground, as the main line;
Cord: The cord is generally used for the power connection of the equipment. There is no difference between who is worse and who is bad, only who is suitable for which position. Therefore, you can choose a hard wire or a soft wire according to the location of the decoration.
What is the difference in construction?
Flexible wire: It is easier to wear when passing through the tube, and the heat dissipation is also better. Construction is easier.
Hard wire: It takes a lot of effort when connecting and crimping the wire, it is not so easy to handle, because it is not so easy to wear through the tube. But the pull of the hard wire is stronger.
In terms of service life and price, what are the advantages of soft wire and hard wire?
The advantage of hard wire in service life is obvious, if the copper wire of soft wire is too thin, it is easy to oxidize .
In terms of price: the hard wire is also much cheaper, and the soft wire has a lot more processes.
The multi-strand soft wire has a larger current carrying capacity (but in the sudden load, the hard wire bears Strong ability), however, for general household use, the current basically does not exceed 100A, and a single-strand can be used.
Single-strand hard wire is superior to multi-strand soft wire in terms of oxidation resistance and service life. Especially if it is used for a long time, the advantages of single-strand are still relatively obvious. If a part of the flexible wire copper wire is too thin, it is easy to be oxidized.
Is it better to use soft wire or hard wire for home decoration?
In theory, hard wire is better. Usually we can pay attention to observe, most of the connectors at home are burnt out Are they all multi-strand cords? Analysis by professional electricians: Each copper wire of multi-strand cords is too thin, which can easily lead to damage and oxidation. The actual distribution of power through each copper wire is uneven, and the heat is not uniform. Conduction, causing part of the copper wire to be damaged first, and then the conductivity decreases to increase the resistance, which further causes more heat to be generated, and finally burns out.
In addition, the current soft wire is a multi-wire metal, so the production is more complicated, the cost is high, and then the price has no obvious advantage, so the hard wire is better. Therefore, it is best to use single-strand hard wires for household use, which is much more reliable and durable, and the advantages of hard wires are that they are more convenient to wear and install, and the price is cheaper than soft wires, and construction workers are more willing to wear them. Hard line, because this hard line is also more convenient to construct.
Household decoration is generally suitable for hard wires, for the following reasons:
1. Strong safety
The standard method of using soft wires is to tin the connectors during wiring. Or press the nose of the wire, otherwise the multi-strand wire may be lifted up and connected to the adjacent conductor, causing danger. During home decoration, ironing will increase the cost and waste time. Some users even don't know that ironing is needed, thus burying potential safety hazards.
Generally speaking, the conductivity of hard wires and soft wires of the same diameter is the same. However, when we are wiring, the flexible wire is often easy to accidentally break a few copper wires, and even when some novice electricians or users replace the socket, they often peel off half of the copper wires when the wire is peeled off. In this way, the current carrying capacity of the wire is affected, and the oxidation of the internal copper wire is accelerated.
In contrast, this is not the case with a single thicker hard wire.
When replacing the wire, although the hard wire is more laborious, it can ensure the complete and smooth extraction from the threading tube. Pull the line together.
The flexible wire is prone to breakage after aging, and it is very likely that the wire will be accidentally pulled off when changing the wire.
As mentioned above, the flexible wire is a multi-strand wire, and the production process of the multi-strand wire is much higher than that of the single-strand wire. The price is also higher than the hard wire. And hard wire can be recycled after disposal, while soft wire does not have this feature. Furthermore, the single copper wire inside the soft wire is thinner, and the service life is not as long as that of the hard wire.
Where is the best place to use a soft wire?
Compared with hard wire, the biggest feature of soft wire is to avoid the skin effect in hard wire (it is not necessary to know what is trending skin effect). Because of this, flexible wires are often used in information transmission or secondary control, mainly for transmitting signals.
Advantages: The wire is softer, more suitable for turning and passing through pipes, easy to install and move
1. The biggest difference between BV wire and BVR wire is that BV wire is a single-strand hard copper wire ;BVR wire is a multi-strand soft copper wire, that is: increase the number of conductors, reduce the diameter of a single conductor, and the diameter of a single conductor is less than 1 mm.
2. In the production process, when BVR is drawing, its single-strand wire is relatively thin, and the requirements for the process will be higher.
3. In terms of current, because of the "skin effect" of the conductor, the current-carrying capacity of multiple strands is higher than that of single strands of the same cross-sectional area.
4. Therefore, the BVR line with the same cross-sectional area will be about 15%-20% more expensive than the BV line.
Wire specifications for routine home decoration
The routine applications are as follows:
1. 1.5mm2---lamps, etc.;
2. 2.5mm2---high-power electrical appliances, such as air conditioners, electric water heaters, etc.;
3.4.0mm2---especially large electrical appliances, household lines, or special occasions, such as cabinets air conditioner. Whether the master bedroom air conditioner uses 4.0mm2 wire. I specifically consulted the electrical engineer of the unit, and the answer was: the safe power of the 2.5mm2 wire is at least 3.2KW. The hanging air conditioner in the master bedroom is 1.5p, and the total power = 1.5*735=1102W. Even considering the starting current of the on-hook air conditioner, a 2.5mm2 wire is enough.
The other one is the kitchen, which satisfies: lighting, range hood, gas water heater, disinfection cabinet, refrigerator, microwave oven are used at the same time.
If the bathroom at home uses an electric water heater, it is also recommended to use a separate 4.0mm2 circuit for the bathroom, which can meet the needs of the bathroom: electric water heaters, Yuba, heaters, lighting, etc. are used at the same time.