Modern man daily uses many different electrical household appliances. And for each of them need to connect to the network power. However, sockets are not always located where necessary and convenient. Therefore, in order to connect the device to the network, often use extension cords. In this case, there are several varieties of such devices, differing not only in appearance but also in characteristics. To understand how to choose the right extension cord, you need to know what characteristics it has.


  • 1 Types of household extenders
  • 2 What to look for when choosing
    • 2.1 Cable
    • 2.2 Fork
    • 2.3 Main unit with sockets
    • 2.4 Button presence

Types of household extenders

Household electrical extension

The more outlets in the extension cord, the higher the risk of overheating of the extension cord when it is fully loaded

According to the type of use, extension cords can be classified as portable and stationary; depending on the hull design, they can be collapsible or non-collapsible; by the degree of protection against voltage surges emit devices with standard or enhanced protection; and finally, depending on the power, there are household or professional "Pilots".

What to look for when choosing

Coil Extension

As a rule, such extenders have more power than household ones.

Before you purchase an extension cord, you must determine under what conditions it will be used, and then evaluate the device according to the main criteria, which include: cable length and section, plug type, type of unit with sockets.


Wire cut

The more lived in the cable, the more its cross section, and hence the power

The cable is one of the main elements in the extension cable. Therefore, when buying it, you need to pay attention to the thickness, quality of the material, the length of the wire. The core section is another important parameter that determines the power of the entire device. And the higher this figure, the more powerful and versatile the extension cord will be.

If the extension cord is planned to be used to connect simple electrical devices (for example, table lamps), a cable with a cross section of 0.75 m2 will suffice. To use more dimensional devices (washing machines or refrigerators), you must choose extenders with a cross section of 1 m2.

Cable length is also a very important selection criterion. Here it is necessary, first of all, to make a start from the distance at which the socket and household appliances are located.

Since the extension cord is directly connected to the power supply, it is also important to take into account the degree protecting its cable from mechanical damage (damage to the integrity of the cable may lead to fire). Cables with a flat shape and a thin layer of insulating material are considered the least durable. More functional and reliable - round thick cables. They are characterized not only by a more dense insulating layer, but also by an additional dielectric inside between the individual cores.


Extension cord plug

Structurally forks are divided into cast and collapsible

Cast forks are considered more durable, reliable, durable. Collapsible forks easier to repair and replace. Also, the plugs can be grounded or not. Although the first ones are more secure, they are not suitable for all devices.

Main unit with sockets

Six-way power strip

An extension cord with a minimum number of connectors is considered safer: from 1 to 3

When choosing an extension cord, it is also recommended to pay attention to the characteristics of the main unit in which the sockets are located. It must be protected from dust and moisture. This parameter is indicated on the device case, it is marked IP with numbers, and the higher their value, the higher the degree of protection.

The number of connectors is also an important selection criterion.

Devices with a large number of outlets are considered more functional, however, their lifespan is reduced in most cases.

If an extension cord has 4 or more connectors, and each of them is actively used to connect devices (for example, it is simultaneously loaded computer, TV, other powerful household appliances), it will sooner or later lead to an increase in the temperature inside the device and overload wiring. The consequence of this may be an unexpected fire.

Button presence

Electric extension with button

Button makes the device more functional

Modern devices are equipped with a special button that allows you to turn on and off the extension without pulling the wire with the plug out of the network. This is convenient, but such devices are much more expensive. In addition, the button does not affect the quality or safety of the “pilot”. On the contrary, an important feature of using an extension cord to power the electronics is the presence of a network filter.

A network filter is a device for suppressing electromagnetic interference from household appliances in an electrical network.

Together with the filter, a varistor can be installed in the extension cords, which protects the equipment from power surges.

Any interaction with an electric current is considered dangerous, especially if powerful household appliances are connected to the network, for example, a refrigerator, a washing machine or a microwave. Low quality extenders can lead not only to equipment breakdown, but also to overloading the wiring, which means that their choice should be treated with due attention.