In what position should the selector lever be placed to operate a dual control switch by hand?

To operate a dual control switch by hand, the selector lever must be placed in the HAND position. This setting allows the physical operation of the switch without interference from the power control system. In this position, the mechanical components engaged in the switching process can be manipulated manually, ensuring that the operator has full control over the switch's function.

Additionally, the HAND position is specifically designed for situations where the switch needs to be operated manually, such as in cases of equipment failure or maintenance tasks. This is crucial for safety and effective operation on the railroad, as it allows conductors and other personnel to perform necessary actions without relying on electrical power systems that may not be operational or safe to use at that moment.