Service feeder from power company on a 3 gang socket

[RonR]

I am installing a 3 gang meter socket, I need to know the size of feeder conductors from the power company, each meter will be feeding a 200 amp panel.
Each 200 amp panel will have baseboard heaters.

 

[infinity]

What is the total load according to the load calculations for the three panels?

 

[tom baker]

A sketch would help. Your terminology is not clear.