What happened here?

[mashburn]

I have never seen this before. What happened?

[Michael Larson]

Try to focus the camera. I can't see it from here

[Larry D. Kage]

Oh, ya that, I haven't seen that in a while either.

[mashburn]

Sorry, Having trouble shrinking the pics.
It is like the buss snaped off were the deposits are.

[Jeffrey R. Pope]

Looks like a tool mark. . .

[Marc D. Shunk]

Originally Posted by mashburn

I have never seen this before. What happened?

You'd have to ask the guy who did it, and he probably won't admit to it.

Looks like a grounded wire or a grounded tool came in contact with the tail end of the buss there. It's certainly an isolated event, and not a symptom of something ongoing.

[mashburn]

I assumed that it is man-made. The curent owners claim that they know of nothing wrong, even the deteriorated asbestos coverd pipes in the basement storage room. Nope, no environmental hazard there.

[Richard A. Moran, 2nd]

By the looks of the box mounting hole I would say the the box is upside down. BUT I have seen threads here somewhere saying that that may not be a problem.
Your mileage may vary.

Dick

[rromoser]

It looks like a completed circuit to me.

[William C. Martin]

I would say that the sparky saw sparks

[mashburn]

Originally Posted by rmoran

By the looks of the box mounting hole I would say the the box is upside down. BUT I have seen threads here somewhere saying that that may not be a problem.
Your mileage may vary.

Dick

The bushing was an extra in the panel just lying there.

Thank you all for your responses.