A 1 kV cable is a low-voltage power cable designed to operate at a rated voltage up to 1 kilovolt (1000 V). It is commonly used for the distribution of electrical energy in industrial plants, commercial buildings, infrastructure projects, and residential installations. These cables are suitable for both fixed indoor and outdoor installations, and can be laid in air, ducts, or directly buried in the ground when the construction allows.A typical 1 kV power cable consists of several main components. At the center is the conductor, usually made of copper or aluminum. Copper conductors provide higher conductivity and are often chosen for installations where space is limited or where voltage drop must be minimized. Aluminum conductors are lighter and more cost‑effective, and are used in many distribution systems. Conductors may be solid or stranded; stranded conductors offer greater flexibility and are easier to handle during installation.Around the conductor is the insulation layer, most commonly made from cross‑linked polyethylene (XLPE) or polyvinyl chloride (PVC). XLPE insulation offers excellent thermal resistance, allowing continuous operation at higher conductor temperatures, typically up to 90°C, and short‑circuit temperatures up to 250°C for a limited duration. PVC insulation is known for its good mechanical properties, flame retardance, and resistance to many chemicals and oils, but with slightly lower continuous operating temperature ratings.In multi‑core 1 kV cables, individually insulated conductors are laid up together and may be separated by fillers to maintain a circular shape and ensure uniform mechanical performance. Over the insulated conductors, an inner sheath or bedding layer can be applied to provide a smooth bedding for any armouring and to protect the cores from mechanical damage.For installations that demand enhanced mechanical protection, an armoured construction is used. Steel wire armour (SWA) or steel tape armour (STA) is applied over the inner sheath. SWA is typical for multicore power cables, offering high tensile strength and resistance to impact, making it suitable for direct burial and industrial environments. Non‑armoured versions are used where mechanical stresses are lower or where cables are installed in protective conduits.On top of all layers, an outer sheath, usually made of PVC or polyethylene (PE), protects the cable from environmental influences such as moisture, UV radiation, and chemicals. For outdoor applications, UV‑resistant outer sheaths are important to ensure long service life. In certain environments, low‑smoke, zero‑halogen (LSZH) sheaths are used to reduce toxic and corrosive gas emissions in case of fire, improving safety in enclosed or public spaces.1 kV cables are designed and tested according to relevant international and regional standards, which define construction requirements, electrical characteristics, mechanical performance, and testing procedures. They are specified by parameters such as conductor cross‑section, number of cores, insulation and sheath materials, temperature rating, and installation conditions. Proper selection of a 1 kV cable takes into account current‑carrying capacity, permissible voltage drop, short‑circuit rating, environmental conditions, and regulatory requirements, ensuring reliable and safe power distribution over the expected service life.