"charles" wrote in message
...
In article ,
newshound wrote:
On 01/09/2015 10:55, NY wrote:
As a matter of interest, what's the typical voltage of the three wires
connected to porcelain/glass insulators, mounted on wooden poles, that
feed the transformers (often pole-mounted) that step down to 240V for
overhead wiring to houses? I can't find anything on Google, using
phrases such as "overhead power line 240V" or "low voltage overhead
power line".


I thought they were 11 kV or 33 kV but someone who knows will be along
in a minute!

It certainly used to be 11kV. However, my working time with an Electricity
Board was in 1959.

Given that supply voltages are multiples of 11 (11 kV, 33 kV, 132 kV), I
wonder why OHLE railway electrification standardised on 25 kV rather than 22
kV?