Going by the posts of rck and harold.
And by my own experience, what's the point in working LIVE?.
bill woods, have you taken notice of what has been said about live work in the Occupational Safety Area?.
I work up to 66kV with Live Glove and Barrier work over here in New Zealand, underground and overhead.
If you can possibly avoid it, work dead, HV's have no friends and you only need make one mistake IMO.
Neoprene blankets or not, there is only so much that you can do.
Even if it is on the city's head, nothing can take away the pain and suffering of burns from a HV flashover.
Just remember that.