Up Next
Back to Show
American Experience
Powering New York's Subway System
Running the Interborough Rapid Transit (IRT) required the most powerful electrical plant in the world. The central powerhouse generated alternating current, which could be sent over long distances. Rotary converters were then built to change the alternating current into direct current needed to run the trains. These rotary converters were placed in substations scattered throughout the city.
Sign up now for inspiring and thought-provoking media delivered straight to your inbox.
Support Provided By
Unlock with PBS Passport
1:50:37
Part of the award-winning The Presidents collection.