It will actually get hotter than that on the cable itself, but since the cable is pretty small, you'll need to loop it to create an area that is that temperature.

It is better if it does not cross over itself, but it is also not the end of the world. It will definitely create a hot spot though, which could potentially burn your animal, so it's best to try and limit where that happens to a place that is not where the animal can touch it.

Hope that helps!

-Jen