What is live wire?

Live wire is a term commonly used in electrical engineering and refers to a wire or conductor that carries an electric current. It is often color-coded as brown or black in electrical installations.

Here are some key points about live wire:

1. Function: The live wire supplies the electrical energy or current to devices or appliances in a circuit. It carries the alternating current (AC) from the power source, such as a generator or a power grid, to power various electrical components.

2. Voltage: The voltage carried by the live wire depends on the specific electrical system and location. In most residential and commercial applications, the live wire carries a voltage of 120 volts or 240 volts in countries adhering to the North American standards.

3. Safety: It is important to handle live wires with caution as they pose a significant risk of electric shock. Coming into contact with a live wire can cause severe injury or even be fatal. Hence, it is crucial to follow appropriate safety measures, such as wearing insulated gloves, using insulated tools, and ensuring power is turned off before working with live wires.

4. Insulation: Live wires are insulated to prevent accidental contact. The insulation is typically made of a protective material, such as PVC (polyvinyl chloride) or rubber. This insulation helps to prevent electric shock and also protects the wire from damage.

5. Identification: In electrical installations, live wires are identified using color coding standards. In North America, the live wire is typically colored black or brown. However, it is essential to note that color codes can vary in different regions, so it is important to follow local regulations and standards.

6. Circuit Breakers: Circuit breakers or fuses are used to protect the live wire and electrical devices from overload or short circuits. These safety devices automatically interrupt the flow of current if there is an excess current flow, preventing damage to equipment and potential fire hazards.

Overall, live wires play a crucial role in delivering electricity for various purposes. However, it is crucial to handle them with utmost care and adhere to safety guidelines to avoid accidents and ensure personal safety.