Thanks for all the great info, i am surprised AMA says 50 feet is enough. Interestingly, apparently 50 feet from a 500 Kv High tension line is ok for AMA, which sort of scares the heck out of me. Maybe 50 feet from a 120 volt line going to a lamp post, but apparently the rule is one size fits all, coupled with a strong dose of common sense. Anyway very interesting replies and I appreciate all the input thus far.

best,

Tom