From the desk of the electrical designer:
I have seen videos of bus duct under fault conditions. Those things really move around when under fault. As far as 120 volts is concerned, to me that is the most lethal of voltages just because everyone thinks it is low voltage. Higher voltages, every one is more careful of. As stated above, 4-6 mA is enough to kill most men. The test results indicated that most women can take a higher current than men; higher resistance, I suppose. This is in no way reflective of men or women, but just the way it is.
As far as working hot any voltage, I think we in the engineering community always specify that safety comes first. We tell our clients that the contractor will work safely. Speaking of safety, Anyone working on a ladder over 6 feet above the floor should have a safety line tied off to a substantial piece of building steel or other object. When on a lift, the same rule applies, attach your safety harness to the lift. That is the safety rule we use here at my company.
Just my 2 cents.
