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	Subject - KA_BOOM!! Jorren Well, we just had a 13,200 line short out to ground in conduit. The force of the arc blast went to the next j-box about 5 feet away. The box is about 5 feet tall, 2 feet wide with a cover of almost 1/4 inch steel. The blast blew the cover off (by shearing all the bolt heads off) and threw the cover about 5 feet through the air and into the isolation switch gear, placing a large dent into it. Luckily, it happened at about 2 a.m. and no one was in the substation. Even though this was an expensive blow -up, (and more importantly no one got hurt) it has provided us a great teaching tool to show the apprentices what an arc fault can do. It usually means more to some one to actually see what could happen due to errors/ommissions than to read about it in a book. Jorren lctrc789 Yea and were you ever lucky no one got injured or worse in that one. Which I am glad to hear. The 13,200 does have a way of getting your attention doesn't it. Scott Vickrey Do you have any pictures? If you do and you can e-mail them to me and I'll post them here. Jorren Scott, unfortunatley cameras are big no-no in our substations. They have even gone as far as banning camera type cell phones. Jorren