View Single Post
  #6   Report Post  
Old October 11th 12, 08:37 AM posted to uk.transport.london
[email protected] boltar2003@boltar.world is offline
external usenet poster
 
First recorded activity at LondonBanter: Nov 2009
Posts: 1,920
Default 12 yr old boy ends up in sidings

On Wed, 10 Oct 2012 14:11:38 -0700 (PDT)
PhilD wrote:
On Oct 10, 8:31=A0pm, Scott wrote:
Why 430 Volts? =A0Do they reduce the voltage in sidings for safety
reasons?


No, that's normal (with minus 220-or-so [1] at the centre rail).

PhilD

[1] someone will be along shortly with the exact nominal figure.


Isn't the reason for it something to do with smaller insulators being
required if each rail only carries part of the voltage?

B2003