What is the first step that an employee must take to operate a dual control switch by hand?

To operate a dual control switch by hand, the first and most essential step is to unlock the switch lock. This is critical because the switch lock is in place to ensure that the switch cannot be manipulated without the proper authorization, ensuring safety and preventing accidents on the railway.

Unlocking the switch is a crucial safety measure that ensures the switch can be operated manually, enabling the conductor to take control over the line safely. Once the lock is released, other operational methods can follow, but this initial step must be completed beforehand.

While notifying the train crew, securing permission from passengers, or ensuring the switch is secure to the main power are also important operational protocols, they would occur after the switch lock is unlocked and do not take precedence as the very first action in this procedure.