Which contact type is associated with a Normally Open configuration?

• A. Normally Closed Contact N.C.
• B. Pushbutton N.C.
• C. Pressure Switch N.O.
• D. Limit Switch N.C.

Answer: (C)

The contact type associated with a Normally Open configuration is the pressure switch in this case. A Normally Open (N.O.) contact means that in its default state, the contact does not allow current to flow; it remains open until a certain condition is met, which causes it to close and allow the flow of current.

In the context of a pressure switch, it is designed to close the electrical circuit when a defined pressure threshold is exceeded. Therefore, in its resting state (when pressure is below the threshold), the contact remains open, and current does not flow. This functionality is crucial in applications where controlling systems based on pressure changes is needed, such as in mechanical and hydraulic systems, ensuring that actions only occur under specific conditions.

Other options refer to contact types that are Normally Closed (N.C.), meaning they allow current to flow until an external action occurs that opens the circuit. This is not aligned with the concept of a Normally Open configuration, which is why they do not answer the question.