[BC] Now, THIS is a job!

[PeterH5322]

>> ... I can't imagine the cable being 
>> live while that work is being done due to RFR and temperature 
>> issues.  Those cables run thermally HOT most of the time.
>>
>Well, that would only be if they're overloaded. which makes me wonder, at
>500kv, just how much current is making it's way from "A" to "B" anyway? 
>How much power is being delivered?

All of them would be ACSR (Aluminum Cable, Steel Reinforced).

The amount of power transmitted is certainly dependent upon a number of 
factors, including whether the lines are "series compensated", which many 
in the West are.

In very cold climates, it is possible that a line can be seen as a 
negative resistance, if over-compensated for the conditions.

A general rule of thumb is a 230 kV air-insulated line can transmit 1,000 
MW, short-term. Long-term is less.

An underground 230 kV line can transmit about one-third of that.

All of Hoover could be transmitted over three 287.3 kV lines, but one of 
those was converted to 500 kV in the late 1960s.