## When a switch is on or off?

A switch is said to be in ON position when it makes or completes the circuit and allows the current to pass through. Similarly, a switch is in an OFF position when it breaks the circuit and does not allow the current to pass through.

How do you tell if an electrical switch is on or off?

Turn the switch lever on and off. The tester should light up when the switch lever is in the on position but should not light up when the switch lever is off.

Which way means a switch is on?

The line symbol means “power on” and the circle symbol means “power off”. The presence of both (I/O) on a push button means the switch toggles the power.

### What is on on switch?

The ON-NONE-(ON) or ON-(ON) circuit is a momentary, double throw, two-position switch circuit. In general, for basic unlighted single pole switches, the maintained ON position closes the circuit at switch terminals 2 & 3, and the momentary ON position closes the circuit at switch terminals 1 & 2.

Which position is on and off?

(1 or | means on.) IEC 60417-5008, the power-off symbol (circle) on a button or toggle, indicates that using the control will disconnect power to the device. (0 or ◯ means off.)

What is on off switch symbol?

How the I and O power button symbols were created. The IEC decided that the symbols to be used for power on and power off would be “I” and “O,” respectively. The “I” represents the binary 1, meaning on, whereas the “O” represents the binary 0, meaning off.

## How does a light switch work?

When you toggle the level to the ON position, the gate snaps closed, completes the circuit, and allows power to flow through the switch and onward to the light fixture. When you flip the toggle lever to the OFF position, the gateway opens up, interrupting the flow of power to the light fixture.

What symbol is for on?

What does the on/off symbol mean?

IEC 5008, the power off (circle) symbol on a button or toggle, indicates that using the control will disconnect power to the device. It comes from the binary system (0 means off) IEC 5010, the power on-off symbol (line within a circle), is used on buttons that switch a device between on and fully off states.

### What symbol means on and off?

IEC 60417-5010, the power on-off symbol (line within a circle), is used on buttons that switch a device between on and fully off states. A crescent moon, indicating sleep mode, is added by IEEE 1621 as a replacement for the standby symbol.

Does the circle mean on or off?

It comes from the binary system (1 or | means on) IEC 5008, the power off (circle) symbol on a button or toggle, indicates that using the control will disconnect power to the device. It comes from the binary system (0 means off)