[GreenKeys] East Wire and West Wire?

[Sam Hallas]

Don Robert House wrote:

>  I believe the East and West originated with railroad circuits that
>  actually went East and West.  One circuit to track trains going East
>  and one for West.

Interesting that US usage is East and West. The UK designations were Up 
and Down - similarly from railway parlance and related to the ends of 
the line.

Up would be towards London, or the railroad company's headquarters if 
different. This led to strange anomalies where the lines of two 
different companies met. Tracks going in the same direction could be Up 
for one company and Down for the other!

Cheers,
Sam