A door switch is suitable for use with a power tong having a door mounted on a tong body to close a throat. The door switch includes a moveable component that is in operational contact with the door and a valve control. The moveable component is biased into contact with the door when the door is in a closed position. The biasing mechanism biases the moveable component to move axially when the door is at least partially open to cause a valve to disengage a hydraulic motor supply. The moveable component disengages from the door when the door is at least partially open. A tab for the power tong has a plurality of edges, each edge defining a smallest distance from a center of a through hole to the respective edge, and each of the smallest distances of each edge being different in size.