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Both devices are safety measures for the electrical circuit. The home fuse is a glass affair with a burnable core. If the core melts, the circuit opens. The circuit breaker does the same thing, but is a "reset" device, meaning that it can be used over and over again. The fuse is replaceable, but not "reset-able." Both systems are used in modern homes, but the fuse system is being replaced by the circuit breaker system.

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14y ago
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14y ago

when a circuit draws more current than the fuse is rated for the element (a piece of metal) in the fuse overheats and melts, therefore breaking the path of the current and no more current flows to the circuit. The fuse element is made to melt at a certain amount of current flowing through it and acts as a safety switch.

A circuit breaker acts the same way, it uses the heat generated by the current flowing though it to trip (open) the circuit when a certain current flow occurs. This is done through a thermo-magnetic mechanism.

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13y ago

Circuit breakers and fuses are designed to protect the wiring in the circuit from overheating and possibly melting or causing a fire. Each gauge (size) of wire will carry only so much electrical current before it overheats. The circuit breaker/fuse is designed to blow/trip at a safe limit before the wiring is overloaded. Larger circuit breakers and fuses protect larger wiring.

The cause of the overload is often a faulty electrical appliances that has shorted out and is allowing electrical current to flow unrestricted. The cause could also be too many appliances connected to the same circuit and, therefore, drawing too much current between them.

In any case, the circuit breaker or fuse is designed to blow or trip long before the wiring can become overheated. This is also why you should never replace a smaller amperage fuse with a larger one.

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12y ago

The current through the device exceeds the rated value. In a fuse the wire in the fuse just melts. In the breaker a switch opens up which is usually caused by heat that trips the breaker. The heat is caused by the excessive current inside the breaker.

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13y ago

Its because of the heavey load that your are pluging

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Q: Why does a fuse blow or circuit breaker trips?
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Why will too many electrical devices operating at one time after blow a fuse or trip a circuit breaker?

The load exceeds the limit of the breaker or fuse. For example a 20 amp breaker on a 120 volt circuit will handle 2400 watts. Exceed that wattage and the breaker will trip or the fuse will blow.


What happens if you overload plug sockets?

the circuit breaker will trip or fuse will blow to open the circuit.


How do you change wire fuse for circuit breaker?

A circuit breaker does not have a wire fuse in it.


In the electrical circuit of a house the fuse is used?

A fuse/breaker is used to protect the wiring within the home for overheating and catching on fire. When the fuse/breaker detects an excess flow of current beyond the range of the fuse/breaker, within a circuit, it will blow/trip to shut off the flow of electricity in that circuit thus preventing a possible fire.


What happens when you connect live wire to ground?

Connecting a live wire to ground can cause a short circuit. This can lead to a sudden surge of electricity flowing through the circuit and may result in a tripped circuit breaker or blown fuse, as well as potential damage to electrical equipment and a risk of fire. It can also pose a serious shock hazard to anyone in contact with the grounded object.


What is the function of the fuse or circuit breaker in a circuit?

A circuit breaker/fuse is designed to protect the wiring from getting overloaded.


What advantaged does a circuit breaker have compared with a fuse?

You can reset a circuit breaker but a fuse you must replace.


What device protects an electrical circuit?

An example of a circuit protection device is a fuse. Another example is a circuit breaker.


When you try to put fuses in for radio on your Saturn 2000 sp1 thew blow out why?

ANYTIME a fuse "blows out," or a circuit breaker "trips out," that event is caused by a current draw [measured in Amps], in/on the circuit, which is larger than the circuit and fuse were designed and intended to carry. The most common cause of a fuse blowing out repeatedly and immediately upon installation is a SHORT CIRCUIT either within the electrical device which the circuit supplies, OR in the circuit wiring itself, usually the latter.


What is the best suitable component for circuit protection instead of fuse?

circuit breaker, or "resettable fuse", which is a reallya small circuit breaker in the housing of a fuse


How does circuit breaker or fuse protect the house from fire?

The fuse is matched to the size wire in the circuit the breaker/fuse it is protecting. For instance, a 20 amp breaker/fuse is used in combination with AWG 12/2 wire. A 15 amp breaker/fuse would be used with AWG 14/2 wire. If there is too much current flow in the circuit caused by either overloading the circuit or by a short in the wires the wiring would overheat and catch fire if not for the breaker/fuse. The breaker/fuse is designed to detect this and to trip or blow and shut off all power flowing to that circuit and prevent a fire. This is why you should never install the wrong size fuse. Put a 20 amp fuse on a 15 amp circuit and it would not protect the circuit as it should.


A fuse or circuit breaker used in a circuit is usually inserted in?

A fuse or circuit breaker used in a circuit is usually inserted in series with the load.