# third rail

> type of electricity transmission of railways, particularly common in metro networks, one pole has a third rail, and the other pole is grounded and connected to the two primary rails

**Wikidata**: [Q748825](https://www.wikidata.org/wiki/Q748825)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Third_rail)  
**Source**: https://4ort.xyz/entity/third-rail


## References

1. Freebase Data Dumps. 2013