EngineeringLength
Longest electric power transmission tunnel
Record
20.0 km
12.43 mi
- Record holder
- The London Connection
What to remember
Under London, electricity travels through a tunnel too. The London Connection, dated 2005, runs for 20.0 km, making it the longest electric power transmission tunnel in the world.
The tunnel is 3 metres in diameter and carries a 400 kilovolt circuit. It belongs to National Grid plc.
Related records
Sources and licences
- Value, holder and date: Wikipedia article “List of longest tunnels” (revision used 1379104625). Data from Wikipedia, licensed under CC BY-SA 4.0.
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