[quote]Of course overload is nine out of ten times the cause of these dramatic failures[quote]

Do you have stats to back this statement. In my expierence the majority of electrical arc faults are, water, loose connections leading to excessive heat and a break down of the insulating material to the point where it is a conductor. Then there is human interference, dropping tools, covers ect.

While I am no lineman I doubt 50 year old lead sheated cable in a downtown would be 240KV. I would think the voltage level thing was just a typical lack of knowledge regarding the subject matter by the reporter