"bob_villain" wrote in message
...
Actually, it can't possibly have been the bulb because, unless the light
switch is defective, I had turned *off* all the light switches.

So, the dead short was most likely somewhere else.

Are you sure you don't have a pot rack? ( ?~ ?? ?°)

I am sure most would not learn about the pot rack and screw in an
engineering school. Just one of the things learned by doing or hearing from
another.