Oil pressure switch Q

[Guest Anonymous]

Are our oil pressure switches considered normally open or normally closed switches?

Obviously, when the oil pressure drops, the switch closes the circuit and the light goes on, but what is the "normal state"? Is it with oil pressure, or without oil pressure? Know what I mean?

s

[Guest Anonymous]

IF I am understanding your question correctly the switch lights the light on the dash. This light doesnt go off unless aproprate pressure is there. The resting state is CLOSED as it is completing the circut. ie why the light is on when you have the switch turned to run before starting.

Sam

[jimk]

Using the logic if the light is engergised when there is not enough pressure, the pressure switch should be normally open. Normal being with the pressure greater then the switch setpoint, abnormal being oil pressure below the switch setpoint.

Would somebody with a loose sender that is good, check for open or closed switch with the sender with it on the bench. If it is closed, the the above logic is true.

[Mike Self]

At rest, the switch won't pass current; when pressurized above 7 psi, current flows.

mike

[ingraham]

In the normal sense of the term as applied to electro-mechanical switches, the 'normal' state is with any applied stimulus (e.g. pressure) removed. With zero oil pressure, the switch is closed.

[Guest Anonymous]

In the normal sense of the term as applied to electro-mechanical switches, the 'normal' state is with any applied stimulus (e.g. pressure) removed. With zero oil pressure, the switch is closed.

Perfect. thank you.