What is the definition of low voltage, medium voltage, high voltage, and extra-high voltage?

Definitions vary somewhat but a general guide to the voltage categories are as follows:

Low Voltage:              up to             1000V

Medium Voltage:       between       1000 V and 35 kV

High Voltage:              between       35 kV and 230 kV

Extra High Voltage:    from            230 kV and above

Low voltage, medium voltage, high voltage, and extra-high voltage cables come in a variety of sizes, materials, and types, each particularly adapted to its uses. Cables consist of three major components: conductors, insulation, and a protective outer sheath. The makeup of individual cables varies according to application.

Relemac offers a wide variety of products including house wiring cables, submersible cables, LAN cables, coaxial cables, PTFE cables, XLPE cables, PVC cables, aerial bunched cables, flexible control cables, instrumentation cables, telecommunication cables, fiber optic cables, fire-resistant cables, rubber cables, thermocouple compensating cables, etc. With excellence in this domain, Relemac have marked our presence among the leading industrial cable manufacturers/ power cable manufacturers in India.