How to choose the correct household power cord?

The correct selection of household power cords not only directly affects the use effect and life of various household appliances, but also relates to the safety of life and property of each family, so it is necessary to understand the correct selection of household power cords. Common household power cords include RVB-70 PVC insulated parallel cord and twisted pair cord, RVZ-70 PVC insulated sheathed cord, RFB RFS type nitrile PVC composite insulated parallel cord and twisted pair cord, RHF type neoprene cord, etc. Different power cords should be used for different household appliances.

The core wires of the above-mentioned types of wires are multi-strand copper wires, and the nominal cross-sectional area ranges from 0 2 to 2 5mm2. For the integrated plug cable used in general lighting, cassette recorder and TV, it is advisable to choose RVB-70 and RVZ-70 parallel or twisted pair cables, and its cross-sectional area should be within the range of 0 75-1 0mm2; For rice cookers, air conditioners, ventilation fans, electric fans, refrigerators, washing machines and other electrical appliances that need to be protected and grounded and have a large electrical load, the power cord and active socket should be RVZ-70 three-core sheathed wire, and its cross-sectional area should be 0 75-1 5mm2; Electric irons, about 100W solder electric ferrochrome, hand drills and other mobile electrical appliances and mobile sockets with strong mobility and heat source or electric sparks, it is advisable to choose rhf type wire, and its cross-sectional area should be 0 75-1 0mm2. When decorating the house, the buried pipe dark wire needs to use BV-70 PVC insulated copper core hard wire, and its cross-sectional area should be about 1 0-2 0mm2 to ensure a long enough safe service life; As for the mobile socket connection used in humid environments such as kitchens and bathrooms, it is advisable to choose RVZ-70 sheathed cable.

Calculate how many household appliances are used, how much the total power current is, and then calculate more than 30% of the current value, and choose how much wire to choose accordingly.

So the choice of household power cord is to remember two points: all kinds of lamps and lanterns with square copper core wires (preferably multi-stranded) socket wires are best used to square kitchen, air conditioning lines go alone, OK

The maximum allowable working temperature of the general wire is 65.

The ordinary wire insulation layer is generally made of polyethylene, polyvinyl chloride and other materials, and the allowable temperature of different insulation materials is different, such as PVC insulated wires, and the maximum allowable temperature of the rated load car is 70; The maximum allowable temperature for a short time is 160 °C; XLPE insulated wire, the maximum allowable temperature at rated load is 90; The maximum permissible temperature for a short period of time is 250 °C, etc.

Precautions for purchasing a power cord:

Looking at the appearance of the power cord, the insulation layer is soft, tough, and elastic, and the surface layer is tight, smooth, no roughness, and has a pure gloss. The surface of the insulation layer should have a clear and scratch-resistant mark, and the insulation layer feels transparent, brittle and non-tough.

According to the national standards, the wire surface should have a continuous mark of the manufacturer's name, product model and rated voltage. This is conducive to finding the manufacturer in time when problems occur during the use of wires, and consumers must pay attention to this when purchasing wires. At the same time, consumers should pay attention to the name of the manufacturer and product model indicated on the certificate when purchasing wires.

The choice of household wires usually refers to the selection of the specifications of the electrical box, such as where to use square wires, where to use 4 square wires, and where to use 6 square wires. That is to say, different use environments, the choice of wires needs to be differentiated. So, how to choose the wire used in the morning?

1. Lighting The general household lighting electricity is guaranteed to be about 2500w, and wires can be used; For some special lighting equipment, such as bath bombs in the bathroom (with high running power), it is recommended to use wires.

2. Socket General lighting wires and socket wires are run separately, which is a mistake that cannot be made in wire wiring. The sockets used in the home use mostly use 4mm wires, which can be connected to electrical appliances with a maximum of 220V*32A=7000W.

3. Air conditioner In order to avoid overload operation of air conditioning wires and to slow down the aging of air conditioning wires, general air conditioning wires will be routed from the electric control box.

4. Water heater.

Electric water heaters are a large power consumer at home, and different specifications have different power consumption, such as 3500w, 6000w, 7500w, 8000w, etc. In order not to overload the wires, the electric water heater will also be routed from the electric control box separately like the air conditioner.

Low-smoke halogen-free flame retardant wires, the property rights of general residential housing are 70 years, and the Far East's "good core and high safety and environmental protection wires" are sensitive, beautifully packaged, and the product certification information is complete;

The raw material of the inner core is pure copper core, which has low resistivity, strong conductivity, energy saving and power saving, and achieves low eccentricity, high concentricity, anti-breakdown, and safer electricity consumption.

The insulation layer is made of high-quality environmentally friendly PVC material insulation layer, which is more wear-resistant, corrosion-resistant, and age-resistant, and at the same time adds flame retardants, which has the characteristics of high-performance anti-combustion, low smoke and halogen-free, non-toxic and harmless;

The national standard line long chain is marked with a standard of 100 meters, and the actual length is 95-100 meters, and the Far East can ensure a length of 100 meters in this regard, which is better than the national standard

1. The demand for household appliances is increasing, and the electricity consumption is also increasing, so the family is more dependent on the sensitive game of wire and electric bridge fuel sales cable. However, for the beauty, comfort, safety and practicality of the house, the household wires and cables can not be selected and laid at will, and should be selected according to the household electricity environment and the total power segment of the electricity consumption, and consumers should also pay attention to the quality of wire products and enhance the awareness of electricity safety.

2. Generally, when decorating household wires, the copper wire with a thick cross-section per square millimeter can safely withstand a current of 10A, that is, a load of 2200 watts. For example, the kitchen may have a variety of high-power electric heaters, so consider using 4 square millimeters of wire.

1. The demand for household appliances is increasing, and the electricity consumption is also increasing, so the family is more dependent on wires and cables. However, for the sake of the beauty, comfort, safety and practicality of the house, the household wires and cables can not be selected at will with the start key and laying, should be selected according to the household electricity environment and the total power of electricity, and consumers should also pay attention to the quality of wire products and enhance the awareness of electricity safety.

2. Generally, when decorating household wires, the copper wire with a thick cross-section of each square millimeter can safely withstand a current of 10A, that is, a load of 2200 watts. For example, the kitchen may happen to have all kinds of high-power electric heaters, so consider using 4 square millimeters of wire.

BV line BV line, Chinese abbreviation is called "plastic copper wire", the full name is called "copper core PVC insulated cloth wire". Three key pieces of information can be seen from its name: the conductor is copper; The insulation layer is polyvinyl chloride (a type of plastic); The use is cloth wires.

Pro, how to choose the line of household weighing shirt as long as the model and use are compared, and then it is not difficult to choose, for you to recommend the following household commonly used wires: decoration buried wall: BV line BV line, Chinese abbreviation is called "collapsed rubber and plastic copper wire", the full name is called "copper core polyvinyl chloride and ethylene insulated cloth wire".

Three key pieces of information can be seen from its name: the conductor is copper; The insulation layer is polyvinyl chloride (a type of plastic); The use is cloth wires.

BV wire can be divided into open leakage single core wire and multi-core wire (in the decoration sometimes called BVR wire "multi-core wire", in fact, it is inaccurate), home decoration generally rough use of single core wire stool spike - multi-core BV line is to prevent high-frequency, high-voltage circuits in the "skin effect", this effect will greatly reduce the current carrying capacity of the wire, but increasing the number of wire cores can solve this problem.

Wiring in the box: BVR line BVR and BV only have one more word, and the difference is only one - "R", soft, indicating that the BVR line is softer than the BV line. Other than that, there is little difference between the two.

The BVR wire is softer because the core is made up of multiple strands of thinner copper wire. Taking a square millimeter wire as an example, there is only 1 copper wire in a single-core BV wire; There are 7 copper wires in the multi-core BV line; There are 19 copper wires in the BVR line. 】

The places that need to use BVR cables in the family are: wiring inside the brother box (for example, when connecting the lights, you may need to extend the wires reserved for decoration for a while, and this wire needs to use BVR cables), the interior of electrical appliances, and the dust liquid in the ceiling.

Surface-mounted wires: sheathed wires or BV wires need to be divided into two situations: 1The wires are directly exposed to air.

At this time, it is necessary to use a sheathed wire - that is, there are two layers of insulation on the outside of the conductor, and the common models are BVV, BVVR, BVVB, etc. The two "Vs" represent two layers of PVC insulation. The difference between the three models is that the BVV is a hard-sheathed wire, and the performance is similar to that of the BV line. BVVR is a soft-sheathed cable with similar performance to BVR; BVVB is a flat sheathed wire, which is made of a flat BVV cable.

The sheath lifting line is full of requirements for direct exposure to the air, but it cannot be directly buried in the wall.

2.If you use an exposed trunking (if you don't think it's ugly, you can use a concealed cable duct), you can use a BV cable - especially when you use a lot of wire, the BV cable will be much cheaper than the sheathed line. One last reminder of a ruined sentence:

It is not necessary that only the visible tung trembling wire is considered to be exposed, as long as it is not buried in the wall or underground, it is considered an open wire. For example, some wires covered by suspended ceilings belong to surface-mounted wires.

Introduction: In our family life, wires are often used, although it is very inconspicuous, but the responsibility is great. There is also a risk of fire if the power lines used by residents are not properly configured or of poor quality.

Therefore, special attention should be paid when choosing and using. Next, Ade will share with you the experience of how to choose wires, I hope it can be helpful to you.

1. A clear sign of appearance

Our country also has standard regulations for wires, and the name of the manufacturer, the model of the product and the rated voltage should be clearly identified on the surface of it. In this way, even in the process of use, if there is a problem, we can find the manufacturer to ensure our rights and safety. Also pay attention to whether it is consistent with the data on the certificate to prevent the purchase of counterfeit wires.

2. Smooth appearance and thick inner core

In addition to looking at the logo, you should also pay attention to its appearance. A qualified wire should be smooth and flat, its insulation and sheath will not show signs of wear, and the logo and handwriting on it should be clear, and there should be no greasy feeling when touched by hand. This is the outer part, so what should it be like on the inside?

From its transverse surface, the thickness of the insulation or sheath on its entire circle should be uniform and of a certain thickness, and there should be no eccentricity.

3. Whether the outer plastic layer is insulated

In the case of wires, the outer plastic layer plays a big role. You should choose a plastic skin with a bright shine and a finer texture. If you don't know the outer plastic material'Good or bad, it is best to use a lighter to light (you can let the seller cut some wires, pay attention to the fire when lighting it) to test, if there is no open flame of the wire, it is good quality.

4. Household wire specifications

BV: It is a single-core wire of copper wire, which is relatively hard, also called hard wire.

BVR: It is a single-core wire with many strands of copper wire twisted together, also called soft wire.

BVVB: It is a hard sheathed wire, that is, two or three BV wires are sheathed together.

RVV: It is a soft sheath line, that is, two, three or four RV wires are sheathed together.

Generally, household wires are simple to choose BV or BVR, if it is a store decoration with a bright line, it is recommended to use BVVB sheathed wire.

5. Precautions for installation:

The line of fire is generally red.

The zero line is generally blue, green, and yellow.

The ground wire is generally suited (blue and green).

Three rolls of different colors are in a group (with zero wire, fire wire, ground wire). Among them, the lighting circuit is divided into two rolls of different colors as a group (used for the neutral line and the live wire).

Generally, it is used for lighting lamps and lanterns for single-core square wires, sockets for single-core wires and square wires, single-core wires for air conditioners or high-power electrical appliances with more than 3 horsepower wires and 4 square wires, single-core wires 6 square wires for total incoming wires, and two-color wires for grounding wires.