When you overload a circuit, what happens to a fuse?

Answer 1

The wiring in your house heats up as current passes through it. The more current, the hotter it gets. If there is too much current, the wiring may get hot enough to start a fire. Fuses and circuit breakers are used to prevent overloading a circuit so that a fire will not break out. Most outlets are wired with 12 gauge copper wire, which is rated and fused at 20 amps.

The fuse contains a short, flat hourglass-shaped metal alloy inside a glass housing. The alloy has a low melting temperature, much like solder. The current density is highest where the metal strip necks down, which is where the hottest temperature develops. When the current is sufficiently high, the alloy will melt and burn the strip open.

Circuit breakers are somewhat more complex. Instead of a metal strip that burns open ("fuses"), the current passes through a small coil of wire to form an electromagnet. The strength of the magnetic field is in proportion to the current: the more current, the stronger the magnetic field. This magnetic field works against a spring-loaded toggle mechanism that operates a switch to open the circuit when the current is too high.

Answer 2

The fuse heats up and burns until the material becomes ash and no longer passes current.

Answer 3

fuse is a fail safe... it actually melts a little strip of metal & breaks the circuit

Answer 4

Too much ampacity moves across a strand of aluminum wire causing it to melt or separate, thus protecting anything downstream of the fuse from too many amps.

Answer 5

Normally blows, U must replace it or set it back if U have
circuit breakers. Unplug what-ever blew it in the first place.

Answer 6

It pops the fuse.

Answer 7

you have 2 fuses for the device. One interior the fuse panel interior the passenger comaprtment and one uner the hood. locate them and consider them the two. in the event that they're sturdy, get on your proprietor's handbook, locate out the place the relay is and replace it.