Jelly .... In the ones I have seen ,the wire , if hit by the blades , slides down them and then wraps around the mast and then also bends the control rods . ( one good reason to fly an Enstrom!!)
I am still hoping that some technology I am invested in will be able to detect a wire , live or dead , from at least 100m distance. Now I would like to sell that , as I do think it would save lives . ( but don't hold your breath as we have been working on it , for different reason , for last 5 years !!)