What is a neutral wire and why is it important in the electrical system? In this article, the updated Fanpage… will help you better understand the symbols, how to distinguish, and the effects of the neutral wire, as well as answer whether the neutral wire causes shock or not.
What is a neutral wire?
In a 3-phase electrical system, besides phases A, B, C, we often see a special conductor called the neutral wire. This wire is connected to the center point of the three-phase power source and plays an important role in balancing the system.
When phases A, B, and C operate unevenly, the neutral wire will help regulate the current, ensuring the system operates stably. In case of an incident, the neutral wire helps the leaking current have a return path, minimizing the risk of fire.
To distinguish the neutral wire from the phase wires, people often use the symbol N or Nc. These symbols are written on electrical equipment and circuit diagrams, making installation and repair easier.
Distinguish neutral wire
To identify the neutral wire, the following methods can be applied:
Check the color: The neutral wire is usually white, gray or black, helping to clearly distinguish it from the red phase wire and the blue ground wire.
Use a measuring device: An electrical meter can help determine this by measuring the resistance between this wire and the phase wire. If the measurement result is greater than 0, the neutral wire is live.
Check frequency: This wire has the role of reducing noise and balancing the circuit. If the current frequency exceeds 50 Hz, the wire may lose efficiency and become dangerous, so the frequency should be tested to determine.
See the symbol on the wire: The wire often has the symbol “N” or “NT” printed on the shell, making it easy to distinguish from other wires.
Note that, when implementing any method, it is necessary to ensure compliance with technical safety procedures. If you are unsure, seek help from electrical experts for accurate advice and guidance.
Tiếng Việt
