brianl703, IMO this would have happened reguardless of what was connected to what as far as the normal computer connections - The connection to an electrical conductor is the cause here. The resulting energy from that transformer outside your house can be mind boggling...
Some information....
http://www.alliantenergy.com/docs/groups/public/documents/pub/p015092.hcsp http://www.mikeholt.com/mojonewsarchive/NEC-HTML/HTML/What-is-Arc-Flash~20040512.php
