[BC] Re:1 5/8 foam coax

[PeterH5322]

>One poster here responding to this thread mentioned filling the line with 
>freon as a possible solution. I thought that the original post fas about 
>foam 
>filled line. At any rate, would freon really help? I would be tempted to 
>use SF6 
>(Sulfer Hexaflouride) assuming that there are no environmental or handling 
>complications. 

SF6 insulation was one way of making 345 kV underground cable work for 
power transmission.

Not many places have the high power density which requires that kind of 
insulation, but NYC does.

In L.A., which has the second highest power density, we just used 
multiple 230 kV lines, sometimes three or four in parallel.