What is the meaning of the number of conductor per phase in electrical wiring system?

[tipu_sultan]

I am a little bit confuse about the conductor per phase and ECC in mm2 as mentioned in the attached figures.




In the above figure there is a data of a Substation containing Feeder-pillars and the second figure contains the data of Feeder-pillars.
Can any one help me about these two terms.

Why number of conductor per phase in Substation is Two while number of conductor per phase in Feeder-pillar is one.

And what ECC Stands for?
Is it a abbreviation or some kind of unit?

 

[chuckey]

Earth Continuity Conductor ( half the size of the phase cable?). I would say that the feeder pillar is what at lower power we would call a tag block, its got one cable in and two cables out.
Frank