This past week I was asked to assist in troubleshooting a "shorting" problem on a layout. In an effort to try and be brief, the layout is U shaped with a Bascule bridge at the opening. The two legs are each being powered by one brick directly connected to the Fixed Inputs of the TIU. THE PROBLEM: When the trains crossover from one leg to the other, they short out the layout and it shuts down. The owner is blowing the TIU fuses repeatedly, so much he has the TIU on the floor (with out the cover on) so he can easily change them. (The family also has 3 dogs that have the run of the house including the train room. IF one of the dogs stuck their nose in the TIU is there enough power that could be dangerous to the dogs?)
I found the problem causing the short, when he wired the layout he reversed the connections from one of the bricks connected to the TIU input. Resulting in Fixed 1 connected correctly, Fixed 2 had the connections reversed. After I corrected the connections the "shorting" problem immediately went away. (I was surprised the TIU had not been damaged, or any of his DCS PS2 & PS3 engines. As I was leaving I offered to close the TIU up but he wouldn't have any part of it.
Is my concern misplaced regarding the exposed TIU just laying on the floor without a cover on it?
Thanks for your thoughts!