Is it permissible to use a switch in the Neutral line?

Using a switch in the neutral line is not permissible according to electrical safety standards. The reason for this is that the neutral conductor serves as a return path for current in an electrical system, ensuring that the circuit is properly balanced and safe.

When a switch is placed in the neutral line, it can lead to hazardous situations. For instance, if the switch is open (off) while the circuit is energized, it can create a scenario where the appliance remains live, presenting a risk of electric shock to anyone who may come into contact with it. Furthermore, it can complicate troubleshooting and maintenance, as a technician might assume the circuit is completely de-energized when it is not.

In various electrical codes and safety practices, the neutral wire should remain continuous and only be interrupted by circuit protection devices like breakers or fuses. Placing a switch on the neutral line disrupts this requirement by introducing a point of potential failure and increases the risk of electrical faults.

This comprehensive understanding reinforces why placing a switch in the neutral line is not allowed and highlights the importance of adhering to established electrical codes for safety and reliability.