Electricman2,
The only thing I saw in the area here was the sprinkler control cabinet to the left of this mess in the 1st pic....
Steve,
The oval hole looked like a factory job, But the edges didn't appear to be rounded out, nor was there any sign of a bushing being installed... I'm going to try searching some of the local papers online & see if I can get some info on the fire cause..... That opening & the completely bbq'd phase looks suspect, except for I'd think it qould've eaten out a chunk of the opening while faulting!

-Randy