Thread: Upgrading sub surface tube lines to 750V
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Old April 12th 10, 02:11 PM posted to uk.transport.london,uk.railway
Basil Jet[_2_] Basil Jet[_2_] is offline
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First recorded activity at LondonBanter: Apr 2010
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Default Upgrading sub surface tube lines to 750V
On 12/04/2010 14:56, d wrote:

Raising the voltage does seem an odd thing to do not least because they dropped
the voltage from 640V years ago citing power saving reasons (which sounds like
rubbish TBH , lower voltages are less efficient , not more).

.... unless the lower voltages leak less.
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