My dad once told me about a story similar to this that happened at the factory he works at: When the building was getting a new roof, the roofers where screwing down some sort of foam with long screws. One of the screws went right into a 2 1/2 inch conduit encasing a 480 volt feeder. Ka-boom!
Luckily no one was injured.
The same building also has several conduits running on the ceiling (similar to the photo) that contain 4160 volt conductors.
Last edited by junkcollector; 06/10/08 12:54 PM.
