Power Supply On Off Switch Symbol

To turn the power washer on press the down on the power switch.

Power supply on off switch symbol.

The power switch on the back of the case is actually for the power supply installed in the computer. I know i line and o circle symbols are used to specify a switch that turn on and off the power supply. Iec 60417 5009 the standby symbol line partially within a broken circle indicates a sleep mode or low power state. Iec 5009 the standby symbol line partially within a broken circle indicates a sleep mode or low power state.

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. I on but the o is really an interrupted circle with a line through it. The switch does not fully disconnect the device from its power supply this may appear on a toggle switch opposite a power on symbol alone on a pushbutton that places the device into a standby state or alone on a button that switches between on and standby. They are the international symbols for power on and power off.

Because i thought that it represent a power line that can be plugged on symbol and a closed line and thus without power supply but seen that in wikipedia said that it can come from 1 and 0 used in binary to represent on and off bits i don t know. On off power button symbols i o. It does not really represent off it represents low power. Some older devices instead have a power switch that accomplishes the same thing as a hard power button.

My question is what is its origin. To turn the power washer off press. O means the power is off and means the power is on. The power switch is a rocker switch and it has two symbols on the face.