George,
Yes, I hear what you are saying about Live work under 600V.
You and I both know, through HV work that the animal of Live work at any voltage is dangerous and should be avoided at any cost.
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When you interrupt an MV distribution circuit, you may have to reenergize by opening up lots of stuff downstream or risk system failure from overload.....
George, this is a situation that I deal with on a daily basis, just having the maps of all the Distribution Systems where I am working and Direct communications with the "Control Centre"(Gives Line Clearances and advises on switching sequences), makes things for me, a helluva lot safer.
One thing that I would personally agree with you is, the fact of TRAINING, nothing can train you better than 4-5 years of working every day with high voltages and I would hate to see a rash of Electrician's rushing out to "have a go" at Live connection work, after all, your eyes don't tend to work too well after having an Inch of molten copper thrown into them!. [Linked Image]