An extension cord is needed in any home. With its help, you can connect various equipment to the electrical network with an insufficient number of outlets, or if they are in an inconvenient or inappropriate place. Despite the fact that adapters with extension cords are presented in a wide variety, some users prefer to assemble these devices on their own. To do this , select the appropriate cable.
The extension cable must have certain technical characteristics . Any wire cannot be used. Experts say that only copper cables are suitable for carrying.
They must have the necessary flexibility, elasticity and are protected by double insulation. If the first layer is damaged, the second will protect against electric shock.
In the Russian market you can find several options that will suit all requirements. One such manufacturer is the PVA brand. This company has earned a reputation due to the excellent quality of its products. The wires are resistant to significant mechanical stress and have the necessary flexibility to serve for a long time.
Most cables that can be used when assembling the extension cord are protected with PVC plastic. It is a wear-resistant material that is not afraid of high or low temperatures. The highest value is 40 degrees Celsius above zero, the lowest is 25 degrees below zero.
The frost-resistant extension cord can be used outdoors or indoors where there is no heating.
The cables used in the manufacture of extension cords are divided into brands . Each of them has certain technical characteristics, which will be discussed later in the article.
On sale you can find options that are designed for different temperature indicators. Frost-resistant species can easily tolerate low temperatures. Even at harsh temperatures, they do not crack and retain elasticity.
It is worth noting options that are not afraid of overheating and prolonged exposure to high temperatures. Modern manufacturers offer wires that can combine the features of both types. Separately make options for standard household use, not differing in special physical characteristics.
Cables are divided into types and depending on the cross-section. The minimum indicator for an extension cord is 1.5 mm squared. When using it, carrying with a power of 3.5 kW will cope with the load in the network, which will reach 5 kW.
Marking size KG 3x1.5 is considered suitable for a line of 220 V.
Note: if you increase the length of the carry, then the reduced power can be restored with an increased cross-sectional index.
On sale you can find various brands of cables that are great for an extension cord. Each of the species has certain features that must be considered before choosing.
This abbreviation stands for flexible cable. It is recommended for use in open areas (construction locations, outdoor repair work, etc.). This option is highly resistant to bending . Quality products withstand at least 30 cycles. At the same time, the wires are not afraid of constant intense and high temperatures.
The highest temperature indicator is 50 degrees Celsius, the lowest is 40 degrees below zero. The service life is 4 years. European manufacturers use the abbreviation XYMM.
And also on sale you can find a variant of KG-HL . It has all the characteristics described above, but has increased resistance to low temperatures. Such a cable can be constantly used in severe weather conditions.
This option is similar to the one presented above, however, it has a reduced service life (instead of 4 years - two and a half years). Also, the maintained temperature regime has been changed: from 50 degrees with a plus sign, to 30 degrees with a minus sign.
Such a cable can be used in locations where the ingress of oils and other liquids, including aggressive chemical components, is permissible. This brand needs protection from sunlight.
The main distinguishing characteristic of this species is its resistance to direct sunlight . In this case, the cable performs all the necessary functions even at low temperatures.
The temperature range is as follows: from 25 degrees of frost to 40 degrees of heat. Experts recommend using the cable in the warm season. The term of operation is 6 years. The number of bends is 30 thousand.
In this case, manufacturers use the following temperature range: from 40 degrees below zero to 40 degrees heat. This type of cable can be used both indoors and outdoors . European companies use the designation RN.
To choose the appropriate option, you need to determine its scope of use . For outdoor use in the cold season, a frost-resistant brand is better. And also manufacturers offer various types for use outside and indoors. We described the characteristics of each of the brands above in the article.
The process of choosing the right cable is easy for experienced professionals. Inexperienced buyers may encounter difficulties. However, knowing a few simple rules, choosing the right cable is easy.
It is recommended that you opt for options with a high rate of flexibility. And also pay attention to the presence of an insulating coating of rubber and other wear-resistant materials. Examine the brands listed above and decide which option is best for you.
Experts advise choosing a cross-section of 0.75-1 mm2 at a voltage of 220 volts. In this case, the carrying length should vary from 5 to 10 meters. At a higher voltage of 380 volts, it is recommended to choose a section from 1.5 to 2.5 mm2.
Before you start using the extension cord, be sure to familiarize yourself with the safety measures.
- Make sure that water and other liquids do not get on the carry.
- If the product is damaged and needs repair, be sure to disconnect it from the power supply.
- Make sure that the wires are not taut, especially if the carrying is switched on.
- It is forbidden to lay the cable under the wallpaper, carpets and other coatings. And also it is impossible to lead the cord through the door sills.
- Do not exceed the permissible load.
- Before use, carefully check the extension cord for defects (chips, cracks, etc.). Broken equipment must not be used.
- Store the extension cord in a dry place, away from direct sunlight.
- Do not wring wires - this will lead to breakage.
Note: if you follow simple and understandable operating rules, a do-it-yourself extension cord will last a long time.
For more information about choosing a cable for the extension cord, see the video below.