What is the normal position of a non-operating brake valve?

The normal position of a non-operating brake valve is the 'Handle-off' position. This position is critical for ensuring that the brake valve remains in a state where it does not inadvertently affect the operation of the train's braking system. When the valve is in the 'Handle-off' position, it is effectively ensuring that the brake system is disengaged from external control, allowing operators to maintain proper control without interference from unintended brake application.

In terms of operational safety and maintenance, keeping the non-operating brake valve in this position helps to prevent accidental activation of the brakes during scenarios when braking is not required. This ensures a smooth and safe operation of the train, as the brakes will not be engaged unless specifically commanded by the operator or necessary due to an emergency.