I have no idea since I do not use electric fencing. Turkeys even with wings clipped can jump very well. Mine never had any trouble getting up on a 6' high roost even with their wings clipped.So I've considered an alternative to a tractor and free ranging. How about I put them in a tractor and allow them to range in an electric fence? How tall does it need to be and what size should I use in order to keep them happy? FYI their wings will be clipped to minimize flying.
I might even just build a cover with some roosts that's portable. TIA
I have their 2 acre free range area enclosed with a 6' high 2"x4" welded wire fence. Mine do a pretty good job of staying within their fenced area because there is no top rail or top bar to lure them into thinking it is a desirable perch site. If it had a top rail or top bar, they would perch on it and they would invariably get down on the wrong side of the fence.
The other reason that I seldom have escapees is because the area inside the fence is lush and green with trees and water while the area outside of the fence is (other than in the spring) is dry, treeless and uninviting.
Good luck with whatever you decide to do.