1. Low-voltage cable: Suitable for fixed laying on AC 50Hz, rated voltage 3kv and below transmission and distribution lines for transmitting electric energy.
2. Medium and low voltage cables: (generally 35KV and below): polyvinyl chloride insulated cables, polyethylene insulated cables, cross-linked polyethylene insulated cables, etc.
3. High-voltage cables: (generally 110KV and above): polyethylene cables and cross-linked polyethylene insulated cables, etc.
4. Ultra-high voltage cables: (275~800 kV).
5. Extra-high voltage cables: (1000 kV and above).