Asked in
England
London
London Bridge

Are the tube lines in London always electricified?

Answer

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Wiki User
March 03, 2008 12:26AM

No the traction rails (not the ones the trains wheels run on) are discharged at the end of passanger service so that engineers can work down the tunnel at night. The traction rails have 600v DC running through them hence the need to discharge at night to prevent electric shock.