David-thats correct, never closer than 3ft to even the lowest voltage high voltage line. You state that any tree that could pass into the zone even if it is 50ft away requires a qualified line clearance tree trimmer. You go on to say that you have no certificate, no formal training etc. but you do line clearance. Anyone who is unqualified and untrained and uncertified caught doing that kind of work here would net the company they were working for a healthy fine. You have respect for the power, thats good, but what do you really know about how to work safely around it? In yours and others opinion here steelcores are bad, bad but you have no training, how can you be so sure they are bad if you are not violating your limits? I''ll say it again, you cannot violate your limits for yourself or conductive equipment you are using ever. You also cannot violate your limits for the dielectrically tested equipment you are using ever. But if you do violate, and say for example touch the line with your tested pole pruner you will be o.k. because its tested. You violate and touch the line with a branch, your hand, saw and yes even your lanyard, steel or not, then you are energized. Again, for feks sake, if it is not dielectrically tested and approved with a valid test sticker, IT IS CONDUCTIVE!! This is what I learned when I was trained, not my opinion, but fact, taught to me by lineman who are older and wiser than me. My ms200 hanging of my ass is as close to the line as the end of my steelcore, its conductive and so what. And some people here advocate chucking a throwline above the primary so they can spurless climb, a sure way to violate your limits. Don't violate your limits! The reason I keep it up here is because one of you guys, who is probably a better climber and a treecare expert than me might get zapped because they know it all. Why can't you guys accept that c.u.a.s have been climbing with steelcores day in day out for years and years without steelcores causing a fatality or an injury? At least some of you same people put forth valid arguements about one handing saws, valid cause you all use saws and have direct, extensive knowledge about using them. Finally, here is something you will not believe, lineman working on very high voltage transmission lines and I do mean on those lines, they wear steel underwear. No b.s.