This is a fault that blew OPEN! The ones we don't see are the ones that stay CLOSED, and use the rest of the building as a fuse. The Fire Dept gets those calls.....
Follow the GEC and see if there was any other hot stuff going on.... Or was this just phase to phase? (With a fast ground hit, as the molten metal dripped)
I would consider everything up stream of this damaged, especially the breaker that DID trip.
