Is the third rail electrified?

This rail carries either 600 or 750 volts in most instances (a notable exception is the Bay Area Rapid Transit, or BART, in San Francisco, which uses 1000VDC.) All third rail systems use DC, or direct current, electricity.

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Which is better third rail or overhead?

Compared to overhead lines, the installation and maintenance of the third rail system require fewer infrastructure modifications and are generally more affordable. This makes it an attractive option for urban transit systems with shorter distances between power supply substations.

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Why don’t rats get electrocuted by third rail?

They don't form a grounding connection between the third rail and the track bed, transit officials said.

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Is the third rail always electrified?

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