HT cables are designed for high voltages across long distances, while LT cables are meant for lower power distribution over shorter distances. HT cables are bulkier, more expensive and require extra safety precautions. LT cables are lighter, cheaper and easier to install and maintain. Conclusion.

Tension is a French word for voltage that comprises the two terms LT and HT. A low tension line simply means low voltage and a high tension line simply means high voltage. If you have a three-phase connection you receive an LT supply of 400 volts. For a single connection, you will receive 230 volts