How does the fuse protects the circuit?

The fuse breaks the circuit if a fault in an appliance causes too much current to flow. This protects the wiring and the appliance if something goes wrong. The fuse contains a piece of wire that melts easily. If the current going through the fuse is too great, the wire heats up until it melts and breaks the circuit.

How does a fuse protect a circuit when a short circuit occurs?

FUSES and circuit breakers are ”safety valves” built into electrical circuits to protect the wiring against overheating due to an overload or a short circuit. … A fuse or circuit breaker prevents this by ”blowing,” or breaking the circuit, when an overload occurs.

What part of the circuit does the fuse actually protect?

In electronics and electrical engineering, a fuse is an electrical safety device that operates to provide overcurrent protection of an electrical circuit. Its essential component is a metal wire or strip that melts when too much current flows through it, thereby stopping or interrupting the current.

What is the function of fuse in an electric circuit?

Electric fuse is a safety device used to limit the current in an electric circuit which melts and breaks the circuit whenever there is an excess flow of current through the circuit.

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What does the main fuse control?

The main job of the fuse is to protect the wiring. Fuses should be sized and located to protect the wire they are connected to. If a device like your car radio suddenly draws enough current to blow the fuse, the radio is probably already toast.

Why is fuse used?

The fuse breaks the circuit if a fault in an appliance causes too much current to flow. This protects the wiring and the appliance if something goes wrong. The fuse contains a piece of wire that melts easily. If the current going through the fuse is too great, the wire heats up until it melts and breaks the circuit.

What are two advantages of using a fuse over a circuit breaker?

Fuses represent a less expensive route for overcurrent protection. They also react faster than a circuit breaker, and they are believed to be more failsafe than breakers because they contain fewer moving parts. The metal either melts or it does not.

What fuse to use?

For an appliance rated as 700W or less, a 3A fuse should be fitted. For appliances above 700W, a 13A fuse should be fitted. One complication of using the 700W rule is that some appliances can draw a higher current when they are first switched on (inrush current).