Why Fuse Is Not Used In The Neutral Wire? Answered

Knowing Why Fuse Is Not Used In The Neutral Wire? Is crucial. Fuses protect electrical circuits from harm caused by excessive current. The fuse will “blow” or stop the flow of electricity when a circuit is overloaded and the current flowing through it is greater than the fuse’s rated capacity.

This prevents harm to the circuit. It is crucial to remember that the fuse should always be installed in the live wire because it is more likely to experience an overload.

After all, it carries the entire load current. The circuit would not be sufficiently protected if the fuse remained neutral.

Why Fuse Is Not Used In The Neutral Wire?

The neutral wire does not require a fuse to safeguard it because it just carries a considerably lower current. If a fuse were put in the neutral line, it would only blow once there was too much current running through it, which is unlikely to happen under normal conditions.

Fuse Is Not Used In The Neutral Wire

Even though there is excessive current flowing, the circuit does not break. The same thing can occur if the fuse is linked to neutral. Because only after the extra current entirely passes through the neutral can the fuse shut off the circuit.

However, either the neutral or the earth can provide a circuit with a conduction pathway to complete it. Therefore, the current flows from the phase line to the earth in the possibility of an electric shock or earth leakage.

The stream keeps flowing as long as it does not return to the neutral. However, the supply connection will still be there in the circuit.

As a result, electrical damage may result in a significant loss. Therefore, the fuse must be placed where the algebraic sum of all the current flows. The main phase line is that one.

Furthermore, a fuse should cut off the power when it burns off or is removed, isolating the load or wire from it.

Disconnecting a neutral line can only allow current to flow through neutral because neutral is not a live conductor coming from the source.

However, the charge is still applied to the living phase. It always supplies a live supply to the load or the conductors.

Therefore, removing the fuse during maintenance or repair will not isolate the current-carrying wires because it is still possible to create a conductive channel that crosses both the Earth and the phase.

However, when a fuse is linked in phase, the entire current must pass through the fuse even if the circuit has another way for electricity to travel.

A fuse wired in phase can therefore offer complete protection. As a result, utilizing a fuse in the neutral is not recommended for safety concerns.


The fuse is never attached to the neutral wire (N) in an electrical installation; it is always linked to the live wire (L). When a fuse is installed in a live wire (phase), if an overload or short circuit causes the circuit current to reach its rated value, it immediately melts and opens the circuit without endangering people. I hope you learned Why Fuse Is Not Used In The Neutral Wire?

Frequently Asked Questions

Can a fuse be placed in neutral?

A live wire is always attached to the fuse. If the fuse wire is linked to the neutral wire rather than the live wire, the appliance will continue to be connected to the live wire even after the fuse blows, preventing overloading from disrupting the current supply.

Why are switches and fuses never located in the neutral wire but always on the phase wire?

It should always be connected to the live wire to ensure that no electricity runs through the appliance when the switch is off. If it is connected to the neutral wire, the circuit is constantly active even when it is off.

Which wire does a fuse not use?

Due to its higher melting point, low resistance, and ability to conduct electricity without melting or interrupting the circuit, copper wire cannot be utilized as a fuse wire.

Why is a fuse only available on live wires?

A fuse is a circuit component of a highly resistant substance that melts during a circuit overload. It is constantly connected to the live wire to interrupt the circuit and protect the attached devices from damage.

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