The new S stock will still run on the current set up 630V (420+ve &
210-ve) but will have optimal perfomance at 750V (or whatever they are
going to use).

LUL trains can still run over 750V lines as they currently do on the
District and Bakerloo lines.

Boltar wrote:

Paul G wrote:

London Underground (LU) announced that it is in the early stages of
investigating increasing the power supply on the sub-surface network
from 630v to 750v - the same as the National Rail network.

Didn't they reduce the voltage from 640 a few years back? Can't they
make their minds up?
Also won't this mean that these lines will now be strictly limited to
the new stock? What if they need to run some jubilee stock over the met
line tracks from finchley road or piccadilly stock over the distict
lines from hammersmith to acton? Not to mention the shared piccadilly
and met section to uxbridge.

B2003