Alan- Bob is correct, the CB is being used like you'd use a safety switch. There were no Line/Load designations. The terminals were on the top and bottom of the CB and the handle operated horizontally. I asked the contractor to label Line/Load with a marker, which he did. If I were the installer, I'd mark it for my own benefit because you'd probable not remember Line/Load when you went back to it in the future. The panel was flush in the wall and there was no way of knowing which way the conductors were coming from. As it turned out the top side of the breaker was being used as the Load and usually the top side is the Line.
