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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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3 phase electrical receptacle on fire, explosions
I had a little bit of a new experience today.
My new place has cables dropped from the ceiling, with receptacles hanging somewhat above my height. I was moving a crane and bumped into one of them, nothing big, just a minor bump. Then I saw that the receptacle was on fire (or rather, flames were coming out from inside), with small explosions inside. I ran to the electrical control panel and turned off electricity to the whole building. The fire stopped. After a short while, I opened up the receptacle. It turned out that it was full of grinding dust (! -- how did it get inside) -- and, apparently, the dust shifted and shorted the contacts. It was a short circuit, but with a lot of resistance from the dust, so it caught fire, but did not trip a breaker. I cut it off and taped the individual wires, but I am now thinking that I need to take all of those things apart and blow them out with compressed air. Comments? i |
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