Electric Power Cable

A power cable is a cable specifically designed for transmitting and distributing electrical energy. It consists of one or more insulated conductors encased in a protective sheath, used for the safe transmission of electricity over long distances.

Power cables are often simply called power lines, cables, or power cables—they are cables used to transmit electrical energy from a power source to the electrical systems of equipment, infrastructure, machinery, or buildings.

A power cord typically refers to a flexible cable with connectors used to connect equipment or appliances to a power outlet; while a power cable typically refers to any cable used for permanent or fixed power distribution within a system or network.

Power cables can be classified by voltage level or structure:

• Low-voltage (LV) cables, for residential/commercial use;
• Medium-voltage (MV) cables, for industrial power distribution;
• High-voltage (HV) cables, for long-distance power transmission;

Some special types include armored cables, flexible cables, and submersible cables.

Power cable conductors are typically made of copper or aluminum, chosen primarily for their conductivity and cost; the insulation layer uses polyvinyl chloride (PVC), cross-linked polyethylene (XLPE), or other materials to provide electrical and environmental protection.

Power cables are widely used in residential wiring, commercial buildings, industrial plants, underground power grids, overhead transmission lines, renewable energy systems, and infrastructure such as railways and airports.

Choosing the right power cable depends on voltage requirements, current carrying capacity, environmental conditions (underground, outdoor), insulation type, and mechanical protection requirements.

Yes—Power cables can be laid underground or overhead, depending on design, environmental factors, and application. Underground cables typically require additional protection, while overhead lines may have a simpler structure.

• Low-voltage power cables operate at voltages below approximately 1kV and are commonly found in buildings and local power distribution.

• High-voltage power cables are designed to transmit voltages of several kilovolts or higher and are used in power grids and long-distance power distribution.

Yes—Flexible power cables or cables use flexible conductors and insulation layers, allowing them to bend and move without damage; these cables are commonly used in portable equipment, machinery, and temporary connections.