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Acrosticus · August 10th 03, 05:40 PM posted to uk.transport.london

From: Michael Bell
Date: 09/08/2003 22:28 GMT Daylight Time

Current can't be increased because it is
limited by the crosssection of the overhead wire, at least not
without it overheating, sagging and other undesireable behaviour.

Unless you install wire with a greater cross sectional area of course, which is
more difficult to keep up in the air because it'll be heavier, so I think
you're right there.

But
if you double the voltage at the same current, you double the power.
At least that's my thinking.

And you seem to be right here two. Since volts x amps = watts, double the
voltage whilst keeping the amperage the same and you've doubled the power too.