It was hardly a personal attack, you clearly don't know what you are talking about.  Are you an electrician?  I didn't think so.  I am.  The first thing you are taught in the trade is that current is the killing factor, not voltage.  277v can in fact be more dangerous than 347v, because 347 will blow you right off the wire, if you are hung up, whereas 277v is enough to hold you onto it, prolonging the electrocution.  As for signing my comment, I don't know how, I'm new here.  I thought it signed you automatically.