This picture shows a 400 kV transmission line.
1. | Insulator. |
2. | Bundle of two conductors (some lines have 4). |
3. | Spacer to hold the two conductors apart. |
4. | Earth wire at top of tower or pylon. |
5. | The three bundles on one side of the tower make up one electrical circuit. Most lines have two circuits, one each side. |
6. | Identity plate saying which line it is and who owns it. Also usually has a safety warning notice about the dangers of electrocution. |
7. | Anti-climbing device - barbed wire to stop unauthorised climbing |