ShVVP wire: abbreviation, design and characteristics

Ball screw wire is currently popular everywhere. It is often used at home. This cord is very high quality and at the same time inexpensive, but due to the small cross-section of the conductors, it is mainly used to connect low-power devices or as household extension cords.

Explanation of the abbreviation and construction of the cord

The decoding of the ShVVP wire means that it is a flat cord with a polyvinyl chloride sheath of the conductors. It stands for letters like this:

1. W - stands for "cord".
2. B - this means that the inner sheath of the cores is made of polyvinyl chloride.
3. B - external insulation of the cord made of polyvinyl chloride.
4. P - means that the cable is flat.

To make it easier to understand the assortment of conductors, it is worth learning to navigate in their abbreviations. There are a wide variety of wires on the market, so this skill will always come in handy.

According to its design features, the ball screw cable can be divided into several elements:

1. Separately insulated stranded conductors.
2. Circular cross-section of the veins.
3. Overall external insulation.

The veins are always parallel to each other. Blue represents zero and brown represents phase. The three-core cable is earthed (yellow-blue).

Cable characteristics

The manufacturer provides a lot of information regarding the characteristics of the cable. It is worth highlighting the main ones:

1. Suitable for voltages of 220 and 380 W.
2. The frequency of the current must be 50 Hertz.
3. Withstands 2000 W voltage for fifteen minutes.
4. The cross-section range is 0.35-2.5 mm.
5. The cable can be used for up to 15 years.
6. The warranty period is 2 years.
7. Resistance of the ShVVP cable is 0.28 Ohm per meter.
8. Working temperature - from -50 to +50 degrees.
9. Installation of the cord can be done at temperatures from -13 to +35 degrees.
10. The average cable weight per meter is between 26 and 49 g.

These characteristics give an understanding of where and under what conditions the wire can be used. They allow you to calculate the maximum load, which is very important for compliance with safety regulations.

Mechanical features

It is important to consider the mechanical characteristics of the cable when installing and operating it. High performance has provided this type of cords with great popularity among consumers.

Key Features:

1. The main advantage of this wire is its flexibility. The bending radius is rather small - about five cord diameters. The cable is flat, therefore the diameter is determined by the smallest value.
2. The production technology provides that the wire will bend many times, so the cable is resistant to mechanical stress.
3. Ball screw wires undergo a tensile test cycle.
4. The production provides for the resistance of the material to high temperatures. The cable is kept in a chamber for four days, where the temperature is 80 degrees. After that, an inspection is carried out for damage.
5. Testing the cable for resistance to negative temperatures is carried out more thoroughly. The frozen wire is passed through the roller, bending the cord. The cable is then tested for impact resistance.

In general, you need to adhere to the nominal values ​​when operating the cable. It is only in rare cases that you can go beyond (if absolutely necessary). The temperature of the wire itself should not be higher than 70 degrees.

Application area

The thickness of the cores of the ShVVP wire is most often less than 2.5 millimeters. This means that it is highly undesirable to connect devices with high power to the mains through these cords. This wire is used to connect devices of low and medium power (1-2 kW). The most common sizes of ball screws, which are used for household needs, are 2 x ½ mm and 3 x ¾ mm.

The main directions of using the ball screw cord:

1. Connecting to the power supply of devices with a power not exceeding 2 kW (electric kettle, radio, food processor, table lamp, etc.). You can also use the wire as an extension cord, but it is better to use another option for this - the PVA connecting wire.
2. The wire is used for the installation of indoor and outdoor lighting. The SHVVP cord can be used to connect LEDs to power supplies.

But this cable is not suitable in every situation. The reason is the small cross-sectional area of ​​the veins. It is highly discouraged to use such a cord as wiring, as it may not withstand the entire load. It can only be used for mounting lighting.

The ShVVP cord is a fairly high-quality and inexpensive option for creating temporary or low-power points of connection to the mains. But for stationary electrical installations with high power, this wire is not suitable, as it can overheat and cause a fire.