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The code stated that if the white wire in a two wire cable is used for a current carrying conductor that it be identified as a current carrying conductor by identifying it with a marker. Usually this marker is three wraps of black electrical tape. This way anyone working on the circuit knows that the wire could be "hot" and it is not a circuits neutral wire.

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Why context switch must be atomic?

Context switch must be atomic to ensure that the state of the system remains consistent during the switch. This is important because a context switch involves saving the state of the current process and loading the state of the next process. If the switch is not atomic, it could lead to data corruption or inconsistencies in the system, resulting in unpredictable behavior.


What is a Latching switch?

A latching switch is a type of switch that maintains its state after being toggled, meaning it stays either on or off until manually changed. It requires only a single actuation to change states and can be useful for applications where you want a switch to stay in a specific state without constant pressure.


What does an open switch look like?

An open switch position typically means the switch is in the off or disconnected state, where the circuit is broken. In a physical switch, the lever or toggle would be in the "off" position, indicating the open circuit.


What is Three state switch?

A three-state switch is an electrical switch that can operate in three distinct positions: ON, OFF, and an intermediate or "high-impedance" state. This intermediate state effectively disconnects the circuit, allowing for greater flexibility in applications such as digital circuits, where it can prevent unwanted interactions between components. Commonly used in applications like data buses, three-state switches help manage multiple signals on a single line without interference.


What does a PTB switch do?

A PTB (Push to Break) switch is a type of switch that is normally in the ON state. When the switch is pressed or activated, it will break the circuit connection and turn OFF the device it is controlling. PTB switches are commonly used as emergency stop buttons in machinery or equipment.

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Why context switch must be atomic?

Context switch must be atomic to ensure that the state of the system remains consistent during the switch. This is important because a context switch involves saving the state of the current process and loading the state of the next process. If the switch is not atomic, it could lead to data corruption or inconsistencies in the system, resulting in unpredictable behavior.


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