I've come across fuses that were broken in half a few times. I figured that they burst or broke when they blew. No damage just alittle cleanup.
I suspect your burned wires and melted arc shield didn't happen in this instantaneous flash but that these things were hot for a long time from loose lugs or corrosion. Thats what I've seen melt those plastic arc shields and the wire insulation. Sometimes those arc shields look like a dali painting
[img] http://members.bellatlantic.net/~cruzan/forums/dali-time-icon.jpg [/img]
