I've been buzzed by service lines with missing insulation hanging siding. its a lot like a 110 outlet in a house. it wouldn't seem like cutting a limb that's contacting it would get you. but I've never tried and could be wrong. I just have em taken down. I just looked at a maple in the city that has 3 lines to 3 different houses going through it. that means the H.O. and 2 of his neighbors will be without power for a day. I kinda feel bad but i'm not getting nailed. maybe I wont get the bid anyway.