If the charge lead has positive potential on each end of it, would your theoretical short not still be unprotected from one side regardless of which side of the fuse may become shorted? What's the solution there? Oh - fuse both ends maybe. hm. That's starting to get kind of involved no?

This is a non-issue. Most factory charge leads are unfused. There is no requirement that I have seen from any of the sanctioning bodies that require it either.

 

Well yes it's positive potential on both ends, but there would still be a potential difference no? The wire, probably large, would not be an ideal conductor and therefore have energy lost due to heat, and obeying the Conservation of Energy law they could not be at the same potential. And as you said its positive potential, current wants to travel in the direction of least resistance, the frame of the car having a potential of zero, the currents ultimate 'goal'. So your telling me that if the wire is melted, or the car is in an accident and the wire crushed, and it becane shorted out to the frame of the car there would be no potential problems? Would a fuse not solve this?

I dunno just wondering, you seem to have a better understand at this then I do.

Steve