I know what you mean. I had three school systems under contract for all their electronic repairs. I got a panic call one Friday morning that their new electronic scoreboard in the gym was dead, and the company that installed it couldn't get there for two weeks and would I "Pretty please, with sugar on it" (Man, did that secretary have a NICE voice!) take a look at it. I said Ok, and headed to the school. As soon as I walked into the gym I spotted the problem. The outlet directly under the scoreboard, and near the floor was brand new, and had a new cover. It was the wrong type and brand that school system used. (The hallways and other public areas used a combo 120/240 volt outlets so the janitors could use 240 V floor buffers.) Someone had replaced that outlet with a cheap duplex 120 V outlet and didn't remove the link when they hooked the two phases to it. When they flipped the 2 pole breaker back on, it died from the overcurrent. Both halves were open, even though the lever still worked. I removed the link from the new outlet and connected the side feeding the scoreboard to a spare 120 V breaker, then had the secretary call the head of their maintenance department to get the right breaker and outlet. (I had to have an excuse to go to the office!) Metal content: The outlet and breaker boxes, and the skull of whoever put in the wrong outlet. If I had found out who did it, their ass would have been full of lead shot.