Now THAT is a real eye opener to what can happen !!!That would have been something pretty spectacular to see... That would put some fireworks displays to shame!

Some years ago when I used to work at the supplier a building down the road had its main underground service short out and it also wiped out the padmount transformer ( Service was 400A 120/240V 1 phase, that consisted of 2 ducts containing 3/0 TWH in paralell)... One of the ducts shorted and burned the conductors bare from the transformer to the fault... Turns out when they were pulling out the damaged conductors, a chunk of broken fish tape was drawn out right where the fault appeared to have originated, and had been tangled in there since day one.. About 15 years if not a bit longer..

A.D