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Electric cables

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Conductors, electrical cables for industrial, tertiary and domestic use.

All types of electrical cables for indoor and outdoor use. Copper cables and aluminium cables. Flexible single-pole cable, halogen-free cables, cross-linked polyethylene electric hose (RVK) and RZ1K cable.

Coaxial (antenna cable) and UTP data cables (RJ45 Network Cable) and basic telephony cable.

From Onulec we would like to take advantage of this article from our blog, to define the different types of electrical cables that exist and that of course you can find in our online store ELECTRIC CABLES.

One of the fundamental elements of any electrical installation, are the cables conductors of the electricity. Without the cables, it would be impossible to carry out any type of electrical installation, whether in the domestic or industrial environment.

An electric cable is a relatively simple element, which is defined as an element designed to conduct electricity. The main elements that make it up are generally a conductive material (mainly copper) covered with an insulating material. Copper is the most used element for the manufacture of electrical cables, although we can also find aluminum, which, although less conductors are cheaper.

In detail, the parts of an electric cable are as follows:

  • The electrical conductor: The conductor is made up of one or more copper or aluminium wires, as we have already said, it is in charge of conducting and transporting electricity.

  • The insulation: It is a component that will cover the wires of the conductor, its function is to prevent electricity leaks.

  • The filling layer: Located between the insulation and the conductor, its function is more than anything aesthetic, the aim is that the cable maintains a cylindrical and homogeneous appearance.

  • The cover: Because it is made of an insulating material, its function is to protect the cable from external elements and better insulate the conductor.

According to the characteristics of the elements that compose the electric cables we can define several categories:

Depending on the type of electrical conductor:

  • Cables with Wire Conductor: The wire conductor may be bare or covered with an insulator, usually made of a single solid wire, usually copper, is not flexible. Its use today is minority, it is still used for grounding along with the pikes.

  • Cables with Flexible Conductor: It is the most used today, for its versatility, is composed of a multitude of fine wires of copper or aluminum, which will be covered by the rest of elements that make up the traditional cable. As they are made with many finer wires, they can be bent easily and can be used in many situations.

  • Cord Conductor Cables: This conductor is actually a composition of several conductors arranged together, each with its own insulation and wrapped for the second time in another insulating layer.

Depending on the type of insulation:

The type of insulation can be known by looking at the inscriptions on the cables, usually abbreviations in English. The cables used for domestic and office applications are the following:

  • Cables with Thermoplastic Insulation: Present in practically all types of cable, it can be identified by its acronym (T). Manufactured with: PVC , Polyethylene, Polychloroprene, neoprene or plastic.

  • Cables with thermostable insulation: Manufactured with: Cross-linked polyethylene, Ethylene-propylene, Coated copper, insulated mineral.

Heat resistant up to 75ºC (H).

Cables with Insulation resistant to heat up to 90ºC : (HH).

Cables with Insulation resistant to water and humidity (W).

Low Smoke" Type Insulated Cables: Characterized by emitting little smoke and contaminating gases when heated or burned (LS).

Depending on the tension supported by the cable:

They are classified in voltage intervals, we can find the following:

  • Very low voltage cables (up to 50V).

  • Low voltage cables (Up to 1000V).

  • Medium voltage cables (Up to 30kV).

  • High voltage cables (Up to 66kV).

  • Very high voltage cables (above 770kV).


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