CYKY 3x4 | Copper power cable | CYKY-L 3G4.0 | 1m | black

Single-core wires are also called monolithic wires,
while multi-core wires are flexible wires.

Wires usually have a single conductor covered with an insulating layer.

Cables have several insulated wires, covered with a common sheath.

Conductor properties of wires:

The resistance of copper conductors is lower (0.017Ω) than that of aluminum (0.028Ω),
but copper has better conductivity.
Copper has better electrical and thermal conductivity than aluminum.
Copper wires are more flexible, more resistant to corrosion, and more durable.
Aluminum wires quickly oxidize upon contact with air, forming a film that weakens the contact.
Copper wires carry higher currents than aluminum wires.
Copper conductors are denser than aluminum. Therefore, copper wire is heavier.

The cross-sectional area of wires is chosen according to the power of specific equipment,
for example: for a 1kW load, a 1.57 mm² cross-sectional area of the conductor is required.
For aluminum wires: 5A per 1mm², and for copper wires: 8A per 1mm². 

The electrical supply cable is the main cable through which electricity is supplied from the ESO (Electricity Distribution Operator) meter cabinet to the internal electrical system of the consumer's building. This cable is a crucial link between the electrical network and the building's installation.

Key Features:

Connection to the ESO network – The supply cable connects the building's electrical system to the ESO distribution network. It is the first element of the electrical installation through which electricity enters the building.
Current capacity – The supply cable must be suited to transmit the required current strength according to the consumer's electrical needs (e.g., 25A, 32A, or more).
Environmental resistance – The cable is often installed outdoors or underground, so it must be resistant to mechanical impacts, UV rays, and moisture.
Number of conductors and cross-section – The most commonly used supply cables are 4 or 5 conductors (depending on grounding requirements), with conductors of 16 mm², 25 mm², or more, depending on the expected load.
Example: CYKY 4x16 or CYKY 5x16 – these are popular supply cables used for 3-phase power supply at 230/400V. They have four or five copper conductors designed for higher currents.
The supply cable is a vital link in the electricity supply, so it is important to ensure that it is correctly selected according to the consumer's electrical load and the environmental conditions in which it will be installed.

We recommend choosing the CYKY supply cable. For single-phase supply, we recommend a 3-conductor cable (CYKY 3×4 mm², 3×6 mm²), and for three-phase supply, a 5-conductor cable (CYKY 5×4 mm², 5×6 mm²). 

This product is marked with the CE label, which confirms that it complies with all applicable European Union directives and regulations. CE marking is not just a formality – it is an important indicator of quality and safety, ensuring that the product has been properly assessed, tested, and can be safely used throughout the EU market.

CE certification means that the product has been evaluated according to the main criteria:

Safety requirements – ensures that the product does not pose a risk to the user or the environment
Electromagnetic compatibility (EMC) – the device does not interfere with other equipment and is resistant to external disturbances
Environmental standards – complies with current ecological and material usage requirements
Operational reliability – the product is suitable for long-term use according to its intended purpose

CE marking allows this product to:

be legally supplied and used in all European Union countries
ensure a high level of quality and safety
be used in residential, commercial, and industrial environments

The CE mark is a declaration of the manufacturer’s responsibility, confirming that the product complies with all applicable standards and has been assessed according to EU legislation.

What does this mean for you as a buyer?

Safe use in everyday activities
Reliable performance and reduced risk of failure
Compliance with EU standards and requirements
Suitability for professional solutions