Why Does a Fuse Blow?

Answer

A fuse blows because of heat from an overloaded circuit. When a circuit is overloaded, the electrical resistance in the circuit increases and this may cause damage to your equipment or cause a fire. The fuse therefore blows in order to prevent this.
Q&A Related to "Why Does a Fuse Blow?"
Some circuits momentarily draw a much higher current than their certified rating when first switched on. This is a normal part of their operation, but can cause fuses to blow unnecessarily
http://www.ehow.com/facts_7304902_slow-blow-fuse_....
An overload of electricity. Fuses are intended to be the weak link in case of an overload so they can be easily replaced. Otherwise the break would occur elsewhere and be more difficult
http://wiki.answers.com/Q/What_causes_fuses_to_blo...
An arc occurs in an electrical circuit when current flows through a gap of ionized gas or air. This event generates a very temperature, enough to melt most metals in less than a second
http://www.quora.com/Electricity/Why-does-arcing-b...
You've heard the term blown fuses, but what is this exactly? First, you need to know what fuses are and just exactly what they are designed to do. You see, your home's electrical
http://electrical.about.com/od/panelsdistribution/...
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