Got a call out to a sewer treatment plant. Some trouble with a bad float. But in trouble shooting I find the hots and neutrals reversed in the control cabinet. They have a cord plug landed on the terminal strip and plugged into a power conditioner unit. I'm told the unit was replaced a year ago, but the way it's setup, you just plug in the cord and that is hard wired to the strip. So it been this way for a long time. So my question, how reliable is a backwards wired PLC? It's a little Micro Logics unit.