Why the overhead lines on the high-voltage transmission line tower are Bare Conductors?
The overhead lines on the high-voltage transmission line tower are bare conductors for the purpose of transmitting current, and the conductor cores should be made of copper and aluminum with good conductivity.
A layer of rubber or plastic is coated on the outer wire of the general wire because rubber and plastic are insulators and protected by them, so it is safer to use.
However, there is no absolute limit between conductor and insulator. Under high temperature or high voltage conditions, objects that are not good at conducting electricity can also become conductors.
Therefore, the overhead lines on the high-voltage transmission tower cannot be insulated with rubber or plastic, and can only be insulated by air, so they are Bare Conductors.
