Wire and cable are composed of conductor, insulating layer, shielding layer and protective layer.
Conductor
Conductor is the conductive part of wire and cable, which is used to transmit electric energy and is the main part of wire and cable.
Insulation layer
The insulating layer is used to electrically isolate the conductors from the earth and conductors of different phases to ensure the transmission of electric energy. It is an indispensable part of the wire and cable structure.
Shielding layer
Wire and cable of 15KV and above generally have conductor shielding layer and insulation shielding layer.
Protective layer
The function of the protective layer is to protect the wires and cables from the invasion of external impurities and moisture, as well as to prevent external forces from directly damaging the power cables.
Classification on application
Power system
The wire and cable products used in the power system mainly include overhead bare wires, bus bars (buses), power cables (plastic cables, oil-paper power cables (basically replaced by plastic power cables), rubber sheathed cables, overhead insulated cables, branch cables (replacing some buses), electromagnetic wires and electrical equipment wires and cables for power equipment.
Information transmission
The wires and cables used for the information transmission system mainly include local telephone cables, television cables, electronic cables, radio frequency cables, optical fiber cables, data cables, electromagnetic cables, power communication cables or other composite cables.
Instrument system
This part is applied to almost all other products except overhead bare wires, but mainly power cables, electromagnetic cables, data cables, instrument cables, etc.
