In the new Toy Hauler, it was not making the magnet go down in the Automatic Transfer Switch, to flow the shore power to the breaker box, when I reduced from 50 amp to 30 amp to 20 amp. The 1 hot wire feed from the 20 amp was located on the wrong side of the 3 lugs in the Transfer Switch case. I switched them and now it works. Only can run one side of the breaker box is the only down fall when I am using 20 amp.